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Means for sensing condition of user's body

Subclass of:

128 - Surgery

128200240 - RESPIRATORY METHOD OR DEVICE

128204180 - Means for supplying respiratory gas under positive pressure

128204210 - Electric control means

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DocumentTitleDate
20090050152Device and Method for Automatically Regulating Supplemental Oxygen Flow-Rate - Device and method for limiting adverse events during supplemental oxygen therapy are disclosed. In the present invention, the oxygen flow between a patient and an oxygen source is controlled with a valve such as a proportional solenoid capable of constraining flow-rates within a continuous range. The flow-rate of oxygen is accurately controlled in a closed-loop with flow-rate measurements. Measures of a patient's vital physiological statistics are used to automatically determine optimum therapeutic oxygen flow-rate. Controller signal filtering is disclosed to improve the overall response and stability. The control algorithm varies flow-rates to minimize disturbances in the patient feedback measurements.02-26-2009
20120199127SYSTEM AND METHOD FOR SUCTIONING FOR SECRETION REMOVAL FROM THE AIRWAY OF A MECHANICALLY VENTILATED SUBJECT - Secretions that have accumulated at or near an airway of a subject (08-09-2012
20130025598OXYGEN DELIVERY SYSTEM - The present disclosure is directed to an oxygen delivery system that distributes oxygen-enriched air around a patient's head and face without requiring a physical connection to the patient. The oxygen is distributed by the system through one or more fluid outputs, which are operatively connected to an oxygen supply line either directly or indirectly through at least one fluid transmission line, manifold or plenum. This directed oxygen mixes with the air surrounding the patient to produce an oxygen-enriched environment at the exit side of the fluid outputs.01-31-2013
20130025597METHODS AND SYSTEMS FOR MONITORING A VENTILATED PATIENT WITH AN OXIMETER - This disclosure describes systems and methods for monitoring the ventilation of a patient being ventilated by a medical ventilator. The disclosure describes a novel approach for triggering the delivery of a breath to account for cardiogenic artifacts. The disclosure further describes a novel approach for calculating exhaled spirometry to eliminate the effect of cardiogenic artifacts.01-31-2013
20130025596METHODS AND SYSTEMS FOR MODEL-BASED TRANSFORMED PROPORTIONAL ASSIST VENTILATION - This disclosure describes systems and methods for providing a model-based transformed proportional assist breath type during ventilation of a patient. The disclosure describes a novel breath type that delivers a target pressure calculated based on a predetermined trajectory and a support setting to a triggering patient.01-31-2013
20090194109CPAP INTERFACE AND BACKUP DEVICES - Described herein are combined active PAP/passive EPAP interface devices to transmit positive air pressure from a PAP source to the user, but provide passive EPAP when the PAP source is disabled. These interface device may continue to provide benefit to the user even if the PAP source becomes disconnected or otherwise fails. The interface devices described herein include a passive EPAP airflow resistor configured to provide expiratory positive airway pressure (“EPAP”). These interface devices may also include quick connects and/or disconnects for releasably connecting to the source of pressurized breathable gas, a quick release for disconnecting from the source of pressurized breathable gas, and an adhesive user interface region that connects the device the user's face. Also described are adapter for converting a PAP interface devices into combined active PAP/passive EPAP interface devices, and methods of using these devices.08-06-2009
20100083968VENTILATOR WITH BIOFEEDBACK MONITORING AND CONTROL FOR IMPROVING PATIENT ACTIVITY AND HEALTH - A respiratory support ventilator apparatus is described that mechanically supports the work of respiration of a patient. The ventilator apparatus is highly portable and optionally wearable so as to promote mobility and physical activity of the patient, and to improve the overall health of the patient. The respiratory support ventilator may monitor a physical activity level and overall health status of the patient, and process this information. The information is used to track efficacy of the ventilation therapy relative to activity level and quality of life, and or to titrate or optimize the ventilation parameters to improve, maintain or optimize the physical activity level and overall health status of the patient.04-08-2010
20100037895DETERMINING SUITABLE VENTILATOR SETTINGS FOR PATIENTS WITH ALVEOLAR HYPOVENTILATION DURING SLEEP - A method and apparatus for determining suitable settings for a servo-ventilator to be used during sleep. Respiratory characteristics of a patient are measured during an awake learning period. With these measured characteristics, a target ventilation setting may be calculated by alternative methods. The calculated setting may then be used for enforcing a minimum ventilation during a treatment period where ventilatory support is provided with a servo-controlled ventilator.02-18-2010
20080257349Multilevel Ventilator - A method and apparatus for detecting breathing disorders and controlling a breathing ventilator using an artificial neural network working on signals indicative of a patient's physiological status. Preferably the artificial neural network works on a signal indicative of the pressure or flow of supplied breathing gas divided into two or more intervals (10-23-2008
20100116274METHOD, VENTILATOR AND CONTROL UNIT FOR DETERMINING A POSITION OF AN ESOPHAGEAL CATHETER - A method of obtaining an indication of the position of an esophageal catheter inserted into a patient includes the steps of obtaining an electrical signal from the esophageal catheter, determining an ECG component of the electrical signal, determining the widths and/or rate of a number of periods in which the ECG component exceeds a threshold value, using the rate or widths of the periods to determine the presence of a P-wave in the ECG component, and concluding that the catheter is in a good position for obtaining a correct EMG signal if a P-wave is determined to be present. If not, the position may be corrected. The method may be performed by a control unit in a ventilator or a monitoring device.05-13-2010
20100071697INVERSION-BASED FEED-FORWARD COMPENSATION OF INSPIRATORY TRIGGER DYNAMICS IN MEDICAL VENTILATORS - A ventilator and method of ventilator control. The ventilator includes a pneumatic system for providing and receiving breathing gas, and a controller operatively coupled with the pneumatic system. The controller employs closed-loop control to provide positive breathing assistance to a patient. Supplemental feed-forward compensatory assistance is also provided, in addition to and independently of that commanded by the closed-loop control. The supplemental assistance may be determined, set or selected based on a ventilator parameter and/or an operator parameter, and/or as an automatic ongoing compensatory mechanism responding to varying patient respiratory demand.03-25-2010
20100071696MODEL-PREDICTIVE ONLINE IDENTIFICATION OF PATIENT RESPIRATORY EFFORT DYNAMICS IN MEDICAL VENTILATORS - Systems and methods for efficient computation of patient respiratory muscle effort are provided. According to one embodiment, patient-ventilator characteristics are received, estimated and/or measured representing values of parameters of interest associated with properties or attributes of a ventilated patient system. Online quantification of respiratory muscle effort of the patient is continuously performed by (i) establishing a respiratory predictive model of the ventilated patient system based on an equation of motion and functions that approximate clinically-observed, patient-generated muscle pressures, (ii) determining an instantaneous leak flow value for the ventilated patient system, and (iii) based on the patient-ventilator characteristics and the instantaneous leak flow value, solving the respiratory predictive model to extract an estimated physiologic respiratory muscle effort value. Then, based on the respiratory muscle effort value or other parameters derived therefrom, the ventilation system is configured and operated for monitoring or breath delivery purposes.03-25-2010
20130074844USE OF MULTIPLE BREATH TYPES - The present disclosure describes a mode of ventilation that makes an automatic determination of an appropriate mandatory breath type in response to one or more patient based criteria. Specifically, the ventilator during the delivery a mandatory breath type determines whether predetermined ventilatory criteria have been met. Based on the determination, the ventilator may deliver one of any number of mandatory breath types. Further, the present disclosure also combines the advantages of a hybrid mode of ventilation with this automatic determination of an appropriate mandatory breath type in response to one or more patient based criteria.03-28-2013
20130206144PRESSURE LINE PURGING SYSTEM FOR A MECHANICAL VENTILATOR - A secondary line purging system (08-15-2013
20100043795METHODS AND APPARATUS FOR HEART FAILURE TREATMENT - Methods and apparatus for assessing the condition of and treating patients for heart failure by the delivery of continuous positive airway pressure are disclosed. Treatment of obstruction due to reflex vocal cord closure often experienced by heart failure patients is distinguished from treatment of upper airway obstruction typically associated with Obstructive Sleep Disorder Treatment may also be implemented by delivering synchronized cardiac pressure oscillations superimposed on a respiratory pressure level to provide assistance for the heart. Heart treatment pressure dose indicator may be calculated for prescribing and monitoring the delivery of treatment. The apparatus may also generate data to track heart failure condition that may be indicative of the degree of severity of heart failure based upon breathing patterns to assist in the diagnosis and management of heart failure patients.02-25-2010
20090159082METHOD OF AUTOMATICALLY CONTROLLING A RESPIRATION SYSTEM AND A CORRESPONDING RESPIRATOR - A method of automatically controlling a respiration system for proportional assist ventilation with a control device and with a ventilator. An electrical signal is recorded by electromyography with electrodes on the chest in order to obtain a signal u06-25-2009
20100108065ACOUSTIC SENSOR FOR USE IN BREATHING MASKS - A breathing mask adapted to be placed over a wearer's face, comprises a mask body including a gas inlet port to be disposed in flow communication with the wearer's breathing passage for flow of a gas in a predetermined flow stream there through upon inhalation by the wearer; a communications microphone (05-06-2010
20100108066Methods, systems and apparatus for paced breathing - Methods, systems and/or apparatus for slowing a patient's breathing by using positive pressure therapy. In certain embodiments, a current interim breathing rate target is set, and periodically the magnitude of a variable pressure waveform that is scaled to the current interim breathing rate target is increased if the patient's breathing rate is greater than the interim breathing rate target in order to lengthen the patient's breath duration. The magnitude of the pressure increase may be a function of the difference between the interim breathing rate target and the patient's breathing rate. The interim breathing rate target may be periodically reduced in response to the patient's breathing rate slowing down toward the current interim breathing rate target. The variable pressure waveform cycles from an inhalation phase to an exhalation phase when the patient airflow decreases to a cycle threshold, the cycle threshold being a function of flow versus time within a breath and generally increasing with time. Different interim breathing rate targets have different cycle threshold functions, and the cycle threshold functions allow easier cycling as the interim breathing rate targets decrease. Similarly, the variable pressure waveform triggers from an exhalation phase to an inhalation phase when the patient airflow increases to a trigger threshold, the trigger threshold being a function of flow versus time within a breath and generally decreasing with time. Different interim breathing rate targets have different trigger threshold functions, and the trigger threshold functions allow easier triggering as the interim breathing rate targets decrease.05-06-2010
20130133656APPARATUS AND METHOD FOR PROVIDING GASES TO A USER - Apparatus and methods are disclosed for controlling pressure delivery to a user such as a patient. A flow generator generates an outlet flow at an outlet port for delivery to a patient. At least one sensor measures properties of the flow of gas at the outlet port or being delivered to the patient. A controller is operatively connected to the flow generator and the at least one sensor, and is adapted to operate according to a pressure control mode in which the controller controls the flow generator to output a substantially steady pressure or a flow control mode in which the controller controls the flow generator to output a substantially steady flow. The controller operates in the flow control mode when a patient may be awake and in the pressure control mode when the patient may be asleep.05-30-2013
20130037028SESSION-BY-SESSION ADJUSTMENT OF A DEVICE FOR TREATING SLEEP DISORDERED BREATHING - A method is disclosed for operating a device that treats sleep disordered breathing (SOB) during successive treatment sessions, where the device provides continuous positive airway pressure during sleep. The method comprises the steps of applying a constant treatment pressure during a first session and deriving a sleep disorder index (SOl) representative of the number of SOB episodes that occurred during the first session. If the treatment pressure should be increased based upon the derived SOl, it is increased during a second, subsequent session.02-14-2013
20100006098CPAP-OXIMETER HYBRID DEVICE AND METHOD OF USING - A CPAP-oximeter hybrid device and an associated method of using are presented for use in automatically adjusting or automatically controlling an air ventilation flow rate as a function of an estimated oxygen level in a patient using the device. The CPAP-oximeter hybrid device includes the interconnected components of a mouthpiece; a first and second EMF emitter; a detector; a housing unit, a blower and a control circuit. The method of using the CPAP-oximeter hybrid device includes the steps of adjusting, allowing, inserting, obtaining, reviewing, removing, setting, switching, and transferring.01-14-2010
20090301492METHOD AND DEVICE FOR DETERMINING THE PEEP DURING THE RESPIRATION OF A PATIENT - The invention relates to a device for the automated determination of the PEEP of a patient. Said device comprises sensors and a suitable electronic system for determining a pressure-volume characteristic curve during a P/V manoeuvre. The electronic system is designed in such a way as to generate, specifically in terms of breathing pressure, the difference between “lung volume during exhalation (Vdef)” and “lung volume during inhalation (Vinf)”, and to determine the maximum value of said difference. The breathing pressure is then determined, for which the volume difference has a value defined in relation to the maximum value of the volume difference. The device calculates a PEEP value on the basis of said determined breathing pressure value.12-10-2009
20090301491SYSTEMS AND METHODS FOR VENTILATION IN PROPORTION TO PATIENT EFFORT - Various embodiments of the present disclosure provide systems, methods and devices for respiratory support. As one example, a ventilation system is disclosed that includes a computer readable medium including instructions executable by a processor to receive a measured pressure value and a net flow value. A patient effort value is calculated based on a relationship between patient effort, the measured pressure value and the net flow value. The instructions are further executable to calculate a gas delivery metric that varies as a function of the patient effort value. Gas is then caused to be delivered consistent with the gas delivery metric.12-10-2009
20090301490SYSTEMS AND METHODS FOR DETERMINING PATIENT EFFORT AND/OR RESPIRATORY PARAMETERS IN A VENTILATION SYSTEM - Various embodiments of the present disclosure provide systems, methods and devices for respiratory support. As one example, a method for respiratory support is described that includes measuring a pressure, providing a measured pressure, measuring an inlet flow and an outlet flow, and providing a measured net flow. A relationship between a first value related to the measured pressure, a second value related to the measured net flow and a third value related to patient effort is used to provide a prediction of patient effort. An interim value is updated based at least in part on the prediction of the patient effort.12-10-2009
20090301489RESPIRATORY GAS SUPPLY CIRCUIT TO FEED CREW MEMBERS AND PASSENGERS OF AN AIRCRAFT WITH OXYGEN - The invention relates to a respiratory gas supply circuit (12-10-2009
20090301488Method And Apparatus For Providing Positive Airway Pressure To A Patient - Methods and apparatus for treatment of medical disorders such as obstructive sleep apnea and congestive heart failure are disclosed. A method involves delivering pressurized air, oxygen or other breathing gas to a patient during a respiratory cycle, where pressure of the air is decreased according to an expiratory unloading factor during expiration. The timing and magnitude of the pressure change may be fully automated and responsive to feedback from a motor load sensor, optionally in combination with a pressure sensor.12-10-2009
20120216810Methods And Systems For Transitory Ventilation Support - This disclosure describes systems and methods for providing a transitory ventilation support breath type during ventilation of a patient. The disclosure describes a novel breath type that provides for a beneficial transition between an assist breath type and an effort-based breath type and/or a breath type that is beneficial for weak patients.08-30-2012
20130068228PATIENT INTERFACES - The present invention relates to a device for delivering a supply of gases to a patient. The device includes a patient interface and connecting member. The connecting member is preferably a L-shaped swiveled connector that is capable of being fixed into one of two positions, a first position where the connector is freely rotatable within the patient interface, and a second position where an interference between the interface and connector prevents the free rotation of the connector within the patient interface, The present invention further relates to a connector that has outlet means, which includes at least one outlet vent and a funnel, which in use directs and passes a substantial portion gases expired from the patient through the outlet vent or vents.03-21-2013
20090272382Method and Apparatus for Predicting Work of Breathing - A method of creating a non-invasive predictor of both physiologic and imposed patient effort from airway pressure and flow sensors attached to the patient using an adaptive mathematical model. The patient effort is commonly measured via work of breathing, power of breathing, or pressure-time product of esophageal pressure and is important for properly adjusting ventilatory support for spontaneously breathing patients. The method of calculating this non-invasive predictor is based on linear or nonlinear calculations using multiple parameters derived from the above-mentioned sensors.11-05-2009
20090272381APPARATUS FOR RESPIRATORY SUPPORT AND NON-INVASIVE DETECTION OF ALVEOLAR DERECRUITMENT FOR PATIENTS SUFFERING FROM RESPIRATORY FAILURE - There is described an apparatus (11-05-2009
20100095964 METHOD AND SYSTEM FOR SYNCHRONIZING A PATIENT MONITORING DEVICE WITH A VENTILATOR DEVICE - A method and system for synchronizing a patient monitoring device with a ventilator device is disclosed herein. The method comprises: accessing a ventilation sequence defined by at least one device setting parameter and initiating assessment of a patient parameter with reference to at least one of the device setting parameter. The method further comprises controlling the progress on the ventilation maneuver based on the patient parameter assessment.04-22-2010
20110011402DISTINGUISHING BETWEEN CLOSED AND OPEN AIRWAY APNEAS AND TREATING PATIENTS ACCORDINGLY - Methods and apparatus for determining the occurrence of an apnea, patency and/or partial obstruction of the airway are disclosed. Respiratory air flow from a patient is measured to give an air flow signal. The determination of an apnea is performed by calculating the variance of the air flow signal over a moving time window and comparing the variance with a threshold value. One determination of partial obstruction of the airway is performed by detecting the inspiratory part of the air flow signal, scaling it to unity duration and area and calculating an index value of the amplitude of the scaled signal over a mid-portion. Alternatively, the index value is a measure of the flatness of the air flow signal over the mid-portion. One determination of patency of the airway is performed by applying an oscillatory pressure waveform of known frequency to a patient's airway, calculating the magnitude of the component of said air flow signal at the known frequency induced by the oscillatory pressure waveform and comparing the calculated magnitude with a threshold value. Alternatively, the air flow signal is analysed to detect the presence of a component due to cardiogenic activity.01-20-2011
20090007916Method for operating an anesthesia or ventilation apparatus having a trigger function and devcie therefor - A method for operating an anesthesia/ventilation apparatus (01-08-2009
20090007914Method and Apparatus for Resolving Upper Airway Obstruction, Resistance or Instability - A CPAP apparatus has a variable rise time (iii) from a base level of positive air pressure during expiration (EPAP) to a higher level during inspiration (IPAP). The rise time is adjusted in order to reduce obstruction, resistance or instability in the upper airway.01-08-2009
20120111329DEVICE AND METHOD FOR ASSISTING A COUGH - The invention provides a device (05-10-2012
20080295840PROCESS FOR OPERATING A RESPIRATOR AND/OR ANESTHESIA DEVICE IN THE APRV MODE WITH THE %PEF CRITERION AND A DEVICE OPERATED CORRESPONDINGLY - A process for operating a respirator and/or anesthesia device in the APRV mode with the % PEF criterion which includes a detection of a spontaneous expiratory effort by the patient and initiation of a pressure release phase when the detected spontaneous expiratory effort by the patient falls within a predetermined trigger window (Tf12-04-2008
20110030687OXYGEN CONCENTRATOR APPARATUS AND METHOD WITH AN OXYGEN ASSISTED VENTING SYSTEM - An oxygen concentrator may rely on a pressure swing adsorption process to produce an oxygen enriched gas stream from canisters filled with granules capable of separation of oxygen from an air stream. The adsorption process uses a cyclical pressurization and venting of the canisters to generate an oxygen enriched gas stream. During venting of the canisters, use of oxygen as a purge gas may improve the efficiency and lifetime of the oxygen concentrator.02-10-2011
20130206143FLOW GENERATOR MESSAGE SYSTEM - A flow generator for delivering breathable gas to a patient includes a processor coupled with operation sensors and a user interface. The processor is programmed to generate at least one of time-based or event-based messages relating to at least one of flow generator operation, flow generator service, flow generator use, patient health, peripheral devices and services, patient treatment, and reminders. Time-based messages are generated at predetermined time intervals based on either time of use or elapsed time. The event-based messages are generated based on signals from the operation sensors. The user interface is configured to deliver the messages to at least one of a display, a flow generator service provider, the patient and a physician. By this system, operation of the flow generator is facilitated and enhanced.08-15-2013
20090293877METHOD AND APPARATUS FOR DETECTING AND QUANTIFYING INTRINSIC POSITIVE END-EXPIRATORY PRESSURE - The present invention describes a method and apparatus for detecting and quantifying intrinsic positive end-expiratory pressure (PEEPi) of a respiratory patient breathing with the assistance of a ventilator. A processing device receives respiratory airway data from one or more sensors adapted to non-invasively monitor a respiratory patient, calculates from the respiratory airway data two or more parameters that are indicative of or quantify intrinsic positive end-expiratory pressure of the patient, and generates a predicted quantitative value for intrinsic positive end-expiratory pressure based on the two or more parameters. The respiratory airway data is transformed into a predicted quantitative value for intrinsic positive end-expiratory pressure (PEEPi).12-03-2009
20090020122Respiratory device for treating obstructive sleep apnea and method for controlling said device - A respirator device for use in treating obstructive sleep apnea is described, with a pressure generator for generating an artificial atmosphere having a treatment pressure, with a pressure regulating device for controlling the pressure generator, and with a respiratory tube with a breathing mask for supplying the artificial atmosphere generated by the pressure generator to a patient, which is characterized in that it has a control mechanism for the continuous determination of a pressure loss occurring over an airway resistance in the airways of the patient, and for the essentially proportional adjustment of the pattern of treatment pressure to the pattern of the determined pressure loss.01-22-2009
20110132370BLOOD GLUCOSE REGULATION THROUGH CONTROL OF BREATHING - A respiratory treatment apparatus (06-09-2011
20090107499Expiratory Volume Reservoir for a Ventilator Patient Circuit - A ventilation system providing inspiratory air to a patient and receiving expiratory air from the patient. The ventilation system comprises a ventilator operable between an inspiratory phase and an expiratory phase of a respiration cycle. The ventilator has an inspiratory outlet for providing inspiratory air to a patient during the inspiratory phase and an expiratory inlet for receiving expiratory air from the patient during the expiratory phase. A patient circuit is configured in fluid communication with the lungs of a patient. The patient circuit conveys inspiratory air from the inspiratory outlet to a patient's lungs during the inspiratory phase and conveys expiratory air from the patient's lungs to the expiratory inlet during the expiratory phase. A flow transducer is provided in fluid communication with the patient circuit. The flow transducer is configured to detect a minimum volume of expiratory air in the patient circuit during the expiratory phase of a respiratory cycle. An elastic reservoir is provided in fluid communication with the patient circuit and the flow transducer. The elastic reservoir is configured to expand to a first volume during the inspiratory phase of the respiratory cycle and contract to a second volume during the expiratory phase of the respiratory cycle. A volume difference between the first volume and the second volume is at least equal to the minimum volume.04-30-2009
20090038616Acclimatization therapy for first time users - Systems, methods, and/or apparatuses for acclimatizing a user to positive airway pressure (PAP) therapy are provided. Generally, a sub-therapeutic treatment pressure is provided initially. It may be ramped up to a full treatment pressure over the course of one or more therapy sessions. The pressure level may be ramped up based on, for example, sleep state, sleep phase, patient compliance with types of treatment (e.g. bilevel vs. CPAP, etc.), clinician input (either at the site, remotely, via pre-programmed smartcards, etc.), etc. Such techniques may be used alone or in combination.02-12-2009
20110297156AUTOMATIC PRESSURE TITRATION - A pressure support methodology and system that utilizes at least two, and possibly all three, of information relating to (i) airway patency, i.e., the degree to which the patient's airway is open, (ii) the primary cause of the current sleep disordered breathing event, and (iii) the patient's response to previous pressure changes to automatically titrate pressure when presented with a sleep disordered breathing event. In another embodiment, pressure may be automatically titrated based solely on the primary cause of the sleep disordered breathing event.12-08-2011
20110271959MONITOR FOR MEASURING IMPROVEMENT IN INVOLUNTARY BREATHING - The present invention is a breathing improvement monitor that continuously measures involuntary breathing. The monitor is a sensor apparatus that is attached to a patient's mask which is connected to the monitoring apparatus. The sensor may be reusable and attachable and detachable to a mask or it may be an integral part of a breathing mask. The sensor technology may be any type sufficient in the art, including but not limited to solid state sensors, transducers, electromagnetic microturbines and the like. Since the mask does not have to be removed and the sensor provides constant signal to the monitoring apparatus, a real time status of a patient's involuntary breathing capability may be determined for a doctor's consideration.11-10-2011
20090205662Method and apparatus for improving cpap patient compliance - A method of operating a device for treating sleep disordered breathing (SDB), wherein the device provides continuous positive airway pressure during sleep, includes applying a treatment pressure to a patient, monitoring the patient for speech output, generating a signal in response to detected speech of the patient, and, in response to the signal, reducing the treatment pressure applied to the patient.08-20-2009
20120006328METHOD AND APPARATUS FOR PROVIDING VENTILATORY ASSISTANCE - The apparatus provides for the determination of the instantaneous phase in the respiratory cycle, subject's average respiration rate and the provision of ventilatory assistance. A microprocessor (01-12-2012
20110284003MECHANICAL VENTILATION IN THE PRESENCE OF SLEEP DISORDERED BREATHING - A method for controlling operation of a CPAP apparatus. The apparatus has a blower, a patient interface, an air delivery conduit for delivering air from the blower to the patient interface, a sensor for determining the pressure in the patient interface, and a control mechanism that causes air to be delivered at a desired pressure to the patient interface and that detects transitions between inhalation and exhalation of a respiratory cycle of a patient in order to synchronise the blower output with the patient's efforts. In one form the CPAP apparatus provides pressure in accordance with a bi-level waveform with at least one characterising parameter of the waveform being automatically adjusted in accordance with indications of sleep disordered breathing. The indications of sleep disordered breathing can be one or more of snoring, apnea, hypopnea, and flow limitation.11-24-2011
20100218767LEAK-COMPENSATED RESPIRATORY MECHANICS ESTIMATION IN MEDICAL VENTILATORS - This disclosure describes systems and methods for compensating for leakage when determining the respiratory mechanics of a patient during delivery of gas from a medical ventilator to a patient. The systems and methods include monitoring an instantaneous flow in the ventilation system based on one or more measurements of pressure and flow in ventilation system. The leakage is modeled using a predetermined leakage model. A leak-compensated instantaneous lung flow of gas inhaled or exhaled by the patient is estimated. Using the leak-compensated lung flow and a predetermined respiratory mechanics model, the respiratory mechanics of a patient may be estimated including at least one of a leak-compensated lung compliance and a leak-compensated lung resistance. The method may include using a dynamic respiratory mechanics model or a static respiratory mechanics model that requires use of a pause maneuver to collect the necessary data.09-02-2010
20100170512Improvements to Electrically Operable Resuscitators - The present invention relates to an electrically operable resuscitation device comprising a pump including a rigid cylinder including at least one gas inlet and at least one gas outlet, a piston to travel in said cylinder, and at least one valve, the or each valve configured to allow gas to be displaced into said cylinder through said at least one gas inlet during at least one of a first stroke direction and second stroke direction of said piston in said cylinder, and for allowing gas to displaced through said at least one gas outlet during an opposite of said at least one of the first stroke direction and second stroke direction of said piston in said cylinder; a motor, selected from one of a stepper motor and feedback motor and stepper motor with feedback and linear motor, operatively connected to said piston to move said piston in said cylinder; a patient interface in ducted fluid connection with said pump to receive gas via said at least one gas outlet and to deliver said gas to said patient.07-08-2010
20110290252CLOSED LOOP RESPIRATORY SUPPORT DEVICE WITH DYNAMIC ADAPTABILITY - The invention provides an automatic system based on the dynamic adaptability strategy for controlling oxygen concentration in blood of patients with fluctuating oxygen needs. The inventive system monitors patient's clinical measurement data and updates the system continuously, which provides changes in FiO12-01-2011
20110297155PATIENT-VENTILATOR DYSSYNCHRONY DETECTION - A method of detecting dyssynchrony between a patient and a pressure support system includes receiving patient flow data relating to a flow of gas provided to the patient by the pressure support system, receiving an I/E state signal representing a respiratory phase of the patient as determined by the pressure support system, and analyzing the patient flow data and the I/E state signal and declaring a dyssynchrony for a breath based on at least one of the patient flow data and the I/E state signal. The method includes determining whether at least one of a number of predetermined criterion is satisfied based on at least one of the patient flow data and the I/E state signal, and declaring the dyssynchrony for the breath if it is determined that at least one of the number of predetermined criterion is satisfied.12-08-2011
20080230063SETTING INSPIRATORY TIME IN MANDATORY MECHANICAL VENTILATION BASED ON PATIENT PHYSIOLOGY, SUCH AS FORCED INHALATION TIME - A method of setting inspiratory time in pressure controlled mechanical ventilation sets a subject's inspiratory time based on the subject's forced inhalation time. Another determines the subject's forced inhalation time and sets the subject's inspiratory time based on the determination.09-25-2008
20100031960Self-Automated Titration System and Method - A method of titration using a combination continuous flow and pulse flow portable oxygen concentration system (system) with a patient includes: a) providing the system in a continuous flow mode and titrating the patient to a predetermined blood oxygen saturation using the system at one or more predetermined conditions in the continuous flow mode; b) providing the system in a pulse flow mode and titrating the patient to the same predetermined blood oxygen saturation as step a using the system at the same one or more predetermined conditions as in step a in the pulse flow mode; c) determining an Individualized Pulse Dose Equivalent (IPDE) correlation based on data obtained from steps a and b; d) providing the system with the IPDE correlation; and e) using the IPDE correlation to operate the concentrator in a more efficient manner.02-11-2010
20110214672SYSTEM AND METHOD FOR CIRCUIT COMPLIANCE COMPENSATED PRESSURE-REGULATED VOLUME CONTROL IN A PATIENT RESPIRATORY VENTILATOR - A system and a method for circuit compliance compensated pressure control in a patient respiratory ventilation system, having a pressure regulated feedback servo control loop, a pressure-regulated volume controller, and a patient volume observer. The patient volume observer is operative to estimate a patient volume, that is, the volume actually delivered to the patient by accounting for volume deviation or loss caused by patient circuit leakage and valve dynamics. Based on the difference between the estimated patient volume and a set tidal volume, the pressure-regulated volume controller is operative to generate and update a circuit compliance pressure compensation factor. The pressure regulated feedback servo control loop is operative to modulate the peak airway pressure based on the circuit compliance pressure compensation factor, so as to achieve the set tidal volume while maintaining a constant inspiratory time and a constant I:E ratio.09-08-2011
20090151725Parameter Optimization in Sleep Apnea Treatment Apparatus - The present invention includes a method and apparatus for the optimized treatment of obstructive sleep apnea. The present invention includes a pressure source configured to provide positive airway pressure to a patient who is resting at home. The pressure source receives control signals from control electronics that define a pressure profile to be delivered to the patient. The control electronics select parameters to define the pressure profile based on factors such as a user selection, information received from a sensor, and/or a prescription.06-18-2009
20120024288APPARATUS AND METHOD FOR SUPPLYING A RESPIRATORY GAS - An apparatus for supplying a respiratory gas to a patient within the scope of the diagnosis and/or the treatment of sleep-related breathing disorders includes an electronic signal processing device for generating a pressure control signal on the basis of indicative signals relating to the breathing activity and/or the physiological state of a person. The signal processing device comprises a signal inputting device and an extraction device for generating data field entries according to predefined signal analysis procedures. A pressure signal generator is provided for generating the pressure control signal, taking into account determined data field entries which are at least selected by the extraction device.02-02-2012
20090308395Coordinated Use of Respiratory and Cardiac Therapies for Sleep Disordered Breathing - Methods and systems involve coordinating therapies used for treating disordered breathing. Disordered breathing therapies may include cardiac electrical stimulation therapy and external respiratory therapy as well as other therapies for treating disordered breathing in a patient. The therapies delivered to the patient may be coordinated to enhance effectiveness of the therapy, to reduce therapy interactions, to improve patient sleep, or to achieve other therapeutic goals.12-17-2009
20110197886RESPIRATORY DEVICE AND METHOD FOR VENTILATING A PATIENT - The invention relates to a respiratory device for ventilating a patient. The respiratory device comprises a respirator that is or can be linked with an endotracheal tube or a respiratory mask. The respiratory device is provided with a control/regulation unit (08-18-2011
20090308394SYSTEM AND METHOD FOR SMART DELIVERY OF BACKUP BREATHS - A method for delivering ventilatory support to a patient is presented. The method includes controlling delivery of a first backup breath by delaying onset of the first backup breath, wherein delaying the onset of the first backup breath is configured to allow selection of an appropriate backup rate. Systems and computer-readable medium that afford functionality of the type defined by this method is also contemplated in conjunction with the present technique.12-17-2009
20100083967MASK DEVICE WITH BLOWER - In a mask device with blower, a sensor for warning is disposed, which detects a movement position of an exhaust valve corresponding to the case where an internal pressure of a face body is lower than an outer atmospheric pressure at the time of inhaling air in a non-contact state and outputs a signal. A warning device operates in accordance with a signal that is output from the sensor for warning.04-08-2010
20100089396METHOD AND APPARATUS FOR TREATING APNEA/HYPOPNEA - Methods and/or apparatuses for treating sleep-disordered breathing (SDB) are provided. In particular, systems and/or methods are provided which may temporarily boost the pressure of a supply of breathable gas provided by an AutoSet device for the treatment of hypopnea. In certain example embodiments, a supply of breathable is provided to patients to treat apneas and/or hypopneas. The presence and/or absence of apneas and/or hypopneas are detected (e.g. by monitoring the Apnea-Hypopnea Index). When hypopnea events are detected, the pressure of the supply of breathable gas temporarily is increased above the Pcrit and/or CPAP levels, at least during patient inspiration. When the hypopnea events are normalized, the pressure is reduced. In certain example embodiments, the pressure will not be increased when a non-hypopnea event is detected at the same time as a hypopnea event.04-15-2010
20090188502ENERGY RELIEF CONTROL IN A MECHANICAL VENTILATOR - The present invention relates to a solution for controlling the pressure/flow of breathing gas to a mechanical ventilator (07-30-2009
20130098363ENDOTRACHEAL CUFF PRESSURE REGULATION CIRCUIT AND METHOD - Cuff pressure modulation results in decreased severity of injury to the subglottic region and upper trachea. A simple device is capable of modulating the pressure in the cuff of a regular endotracheal tube, by coordinating the pressure level to be maximal during the inspiratory phase and minimal during the expiratory phase. This allowed for regular positive airway pressure ventilation as during inspiration the seal was maintained between the ETT and the tracheal mucosa by the inflated cuff, but during expiration cuff deflation allowed the cuff pressure to drop in the subglottic and tracheal area.04-25-2013
20090151724METHODS AND DEVICES FOR PROVIDING INSPIRATORY AND EXPIRATORY FLOW RELIEF DURING VENTILATION THERAPY - Respiratory support and/or controlled mechanical ventilation of a patient are provided. A ventilation apparatus may include a ventilator, a transtracheal prosthesis, and a respiratory relief device. The transtracheal prostheses and ventilation catheter may be arranged such that the patient can breathe freely through the upper airway and/or the tracheal prostheses. Respiratory sensors may measure a breathing rate, lung pressure, airway pressure, or a combination thereof. Pulses of gas may be provided to the patient through the ventilation catheter during inspiration. The pulses may have a first volume while the patient breathes normal and a second volume when the sensors detect a cessation of breathing or reduction in breathing volume. The second volume may be provided at 1-5 times the normal breathing rate, with a volume 25-500% times the first volume, or both.06-18-2009
20100218766CUSTOMIZABLE MANDATORY/SPONTANEOUS CLOSED LOOP MODE SELECTION - A multimode ventilator is disclosed that provides physicians and clinicians the ability to select multiple modes of operation for the ventilator. Embodiments of the present disclosure provide users with the ability to select from multiple modes of ventilator operations. The users may also set transition conditions and monitoring thresholds that determine when the multimode ventilator transitions between the selected modes of operations. Multiple user interfaces are also disclosed that allow the user to interact with the multimode ventilator in order to select particular modes of operation, transition conditions, and monitoring thresholds.09-02-2010
20090288661ARRANGEMENT AND METHOD FOR SUPERVISING MEDICAL MONITOR - An arrangement for supervising a medical monitor. The arrangement for supervising the medical monitor comprises a measurement function having at least one measurement device to make at least one measurement for obtaining measurement information for monitoring one or more patient care signals. The arrangement for supervising the medical monitor also includes a supervision analyzer configured to communicate with the measuring function and to receive the measurement information. The supervision analyzer is adapted to obtain reference information and to compare the measurement information to the reference information to determine whether the measurement function is working properly.11-26-2009
20120167885Systems And Methods For Ventilation To Obtain A Predetermined Patient Effort - Various embodiments of the present disclosure provide systems, methods and devices for respiratory support. As one example, a ventilation system is disclosed that includes a computer readable medium including instructions executable by a processor to receive a measured pressure value and a net flow value. A patient effort value is calculated based on a relationship between patient effort, the measured pressure value and the net flow value. The instructions are further executable to calculate a gas delivery metric based on the computed patient effort to obtain a predetermined patient effort. Gas is then caused to be delivered consistent with the gas delivery metric.07-05-2012
20090165798 METHOD FOR IMPROVING CONTROL AND DETECTION PRECISION OF TIDAL VOLUME BY A CALCULATION INTRODUCED WITH R VALUE - The present invention discloses a method for improving control and detection precision of tidal volume by introducing R value, comprising the steps of: a plateau pressure Pplate is used to calculate a system compliance C with C=ΔV/(Pplate−PEEP); V07-02-2009
20090165797AIRWAY SYSTEM, OPERATING MEHTOD THEREOF AND VENTILATOR OR ANESTHETIC MACHINE HAVING SUCH SYSTEM - The present invention discloses an airway system and operating method thereof in the medical equipments such as a ventilator and an anesthetic machine. The airway system comprises: a respiratory circuit (07-02-2009
20120291785METHODS AND APPARATUS FOR ADAPTABLE PRESSURE TREATMENT OF SLEEP DISORDERED BREATHING - Respiratory pressure treatment apparatus include automated methodologies for controlling changes to pressure in the presence of sleep disordered breathing events. In an example apparatus, various levels of expiratory pressure relief can provide different pressure reductions for patient comfort during expiration (11-22-2012
20090038617ADMINISTRATION OF CPAP TREATMENT IN PRESENCE OF APNEA - CPAP treatment apparatus is disclosed having a controllable flow generator (02-12-2009
20110197888METHOD AND SYSTEM FOR VENTILATION - A method of monitoring tracheal pressure of a subject is disclosed. The subject is ventilated with breathing gas flowing via an endotracheal tube having an inflatable cuff. The method comprises monitoring sealing of the trachea by the cuff using a close loop control, varying a ventilation pressure thereby varying flow level of the breathing gas, monitoring a response pressure within the cuff in response to the variation, and calculating the tracheal pressure using the ventilation pressure variations, the cuff response pressure and the flow level. In some embodiments, an under-pressure is applied for suctioning fluid carrying secretions, synchronously with variations in the tracheal pressure.08-18-2011
20110197887ACCESSORY CONNECTION AND DATA SYNCHRONICATION IN A VENTILATOR - A medical ventilator that includes a memory device, a controller operatively coupled to the memory device, and an accessory connector provided at or about the exterior of the ventilator housing. The controller is adapted to record ventilation data in the memory device that includes at least one of data relating to the operation of the ventilator and data relating to the breathing of the patient while ventilation therapy is being provided to the patient. The accessory connector is structured to operatively couple the controller to an accessory device and to provide power to the accessory device. The accessory connector also serves as a communication bus for enabling the accessory device to communicate data generated by it to the controller, which in turn is adapted to record the accessory device data in the memory device in a manner wherein the accessory device data is merged.08-18-2011
20080251078Systems and methods for visualizing pressures and pressure responses to sleep-related triggering events - Systems and methods for visualizing patient treatment data collected while a patient suffering from sleep-disordered breathing is treated are provided. For example, according to certain example embodiments, a PAP device for treating a patient suffering from sleep-disordered breathing is provided. A processor may be set or programmed to generate a signal indicative of a triggering event. A flow generator may be configured to provide a supply of pressurized breathable gas to the patient based at least in part on the signal. Recording programmed logic circuitry may be provided to record in a data log pressures provided during patient treatment and triggering events occurring during patient treatment. Visualizing programmed logic circuitry in communication with the PAP device may be configured to read the data log and generate a visual depiction of provided pressures over time. Triggering events may include, for example, one or more of apnea, hypopnea, flattening, snore, etc.10-16-2008
20120291784METHOD AND SYSTEM FOR VISUALIZING MECHANICAL VENTILATION INFORMATION - Methods and systems for visualizing mechanical ventilation information are provided. One system includes a user interface for a medical system having a ventilator is provided. The user interface includes a memory storing one or more sensor measurements for a patient and a processor. The processor is programmed to display a visualization of a tidal volume determined from one of the sensor measurements of the patient and display a visualization of lung compliance for the patient, wherein the tidal volume visualization and the lung compliance visualization are displayed concurrently.11-22-2012
20080283062Respiratory Component Measurement System - A respiratory component measurement system that includes an airway adapter adapted to be placed in fluid communication with an airway of a patient and a sensor element in physical communication with the airway adapter. The sensor element is adapted to detect an orientation related characteristic of the airway adapter, a motion related characteristic of the airway adapter, or both. A respiratory component sensor is also adapted to be disposed on the airway adapter so as to measure a characteristic associated with a flow of gas through the airway adapter.11-20-2008
20080308105Computer Controlled Cpap System with Snore Detection - A CPAP apparatus is provided that determines the presence of a snore by the simplified method of using filtered expiratory noise as the measure of intrinsic device noise and comparing that to filtered inspiratory noise. The filtering time constants for inspiratory and expiratory noise are adjusted such that treatment pressure does not cause false snore detection.12-18-2008
20080210236Tubing management system - A tubing management system for a CPAP system includes a pillow including at least one port through an interior portion thereof. Each port includes an inlet and an outlet that is adapted to be coupled to an air delivery conduit to allow the air delivery conduit to be routed through the interior portion.09-04-2008
20080283061Energy Trigger - A method and apparatus for facilitating breathing using a mechanical breathing gas ventilator is presented. The patient effort is deduced from a measured flow signal and analyzed with respect to the energy in the breathing system comprising the mechanical ventilator and the patient. When a predetermined energy threshold has been reached the ventilator responds to the breathing pattern change.11-20-2008
20130118494METHODS AND APPARATUS FOR HEART FAILURE TREATMENT - Methods and apparatus for assessing the condition of and treating patients for heart failure by the delivery of continuous positive airway pressure are disclosed. Treatment of obstruction due to reflex vocal cord closure often experienced by heart failure patients is distinguished from treatment of upper airway obstruction typically associated with Obstructive Sleep Disorder. Treatment may also be implemented by delivering synchronized cardiac pressure oscillations superimposed on a respiratory pressure level to provide assistance for the heart. Heart treatment pressure dose indicator may be calculated for prescribing and monitoring the delivery of treatment. The apparatus may also generate data to track heart failure condition that may be indicative of the degree of severity of heart failure based upon breathing patterns to assist in the diagnosis and management of heart failure patients.05-16-2013
20130118497METHOD FOR SEMANTIC COMMUNICATION OF DEVICE DATA BETWEEN A SOURCE AND RECEIVING CLIENT - A treatment delivery system includes one or more medical therapy delivery devices (05-16-2013
20100139659SPO2 CONTROL WITH ADAPTIVE LINEAR COMPENSATION - A device and a process for controlling a respirator with inclusion of an oxygen saturation value (06-10-2010
20090139523System and Method for Automated Titration of Continuous Positive Airway Pressure Using an Obstruction Index - Described is a system including an air pressure supply arrangement, a sensor and a titration device. The air pressure supply arrangement provides air pressure to a patient's airways. The sensor detects input data corresponding to a patient's breathing patterns of a plurality of breaths. The titration device receives and analyzes the input data to determine existence of breathing disorder and corresponding characteristics. The titration device generates output data for adjusting the air pressure supplied to the patient as a function of an index of abnormal respiratory events included in the input data.06-04-2009
20090025725TRANSIENT INTERVENTION FOR MODIFYING THE BREATHING OF A PATIENT - A method for modifying the breathing of a patient while the patient is experiencing sleep apnea, for example Cheyne Stokes breathing. An instantaneous pulmonary ventilation of a patient is monitored. Limit cycle behavior of the instantaneous pulmonary ventilation is identified. A transient intervention is applied to the patient during a phase of a limit cycle of the instantaneous pulmonary ventilation. The transient intervention has an effect on a breathing state of the patient.01-29-2009
20120138058SINGLE STAGE, AXIAL SYMMETRIC BLOWER AND PORTABLE VENTILATOR06-07-2012
20120138057System and Method of Automated Lung Recruitment Maneuvers - A method of providing a recruitment procedure to a patient includes monitoring at least derecruitment event. A score is calculated for the at least one derecruitment event. A derecruitment score is aggregated. The derecruitment score is compared to a recruitment threshold. A ventilator is operated with the processor to perform a recruitment procedure. A system for providing mechanical ventilation to a patient includes a mechanical ventilator configured for pneumatic connection to a patient in order to deliver medical gas to the patient. A peripheral system is configured to provide medical assistance to the patient and the peripheral system produces a signal indicative of the operation of the peripheral system. A processor is communicatively connected to the mechanical ventilator in the peripheral system. The processor receives the signal from the peripheral system and calculates a first score from the signal. The processor aggregates the first score into a derecruitment score and compares the derecruitment score to a predetermined threshold. The processor operates the mechanical ventilator to provide a recruitment procedure to the patient.06-07-2012
20090241957BREATHING ASSISTANCE SYSTEMS WITH LUNG RECRUITMENT MANEUVERS - The disclosure provides a method for controlling the delivery of a breathing gas to a patient including automatic lung recruitment maneuvers. The method may include regulating the FiO10-01-2009
20090199855SYSTEM AND METHOD FOR CONSERVING OXYGEN DELIVERY WHILE MAINTAINING SATURATION - A system and method, for maintaining a predetermined level of a treatment gas in a patient while conserving use of the treatment gas, comprising a source of the treatment gas, a sensing device for sensing a breathing cycle of a patient, a conserver for controlling intermittent supply of the treatment gas to the patient in response to the sensed breathing cycle. In a first mode, when the sensing device senses breathing, the treatment gas is intermittently supplied to the patient at a supply rate coordinated with the breathing cycle. In a second mode, when the sensing device is unable to sense breathing, the treatment gas is supplied to the patient at a second intermittent cycle, determined independently of the patient breathing cycle, which is selected to overlap an assumed patient breathing cycle such that at least a desired level of the treatment gas is maintained in the patient.08-13-2009
20090320845Method of demand valve oxygen therapy for rapid abort of cluster headache - Methods for easing the duration of pain experienced by patients during a cluster headache are disclosed including providing a high-pressure source of substantially pure oxygen, applying the oxygen to the patient so that inhalation by the patient is substantially limited to inhalation of the substantially pure oxygen, inhaling the substantially pure oxygen in order to cause hyperventilation by the patient, and continuing hyperventilation at least until the patient achieves respiratory alkalosis, hypocapnia hyperoxia, and until the pain is terminated. The method preferably includes using a demand valve having a predetermined manual purge flow rate and a variable output flow rate to the user based on respiratory demand.12-31-2009
20090314294Breathing assistance device comprising a gas regulating valve and associated breathing assistance method - The invention relates to a breathing assistance device for a patient, the device including: a source of respiratory pressurised gas; a gas transmission duct comprising a distal end coupled to said source and a proximal end coupled to the patient; a gas regulating valve interposed in the gas transmission duct at a proximal location, comprising a leakage orifice and an obstruction means capable of varying the opening of the leakage orifice upon signal of controlling means and allowing a bidirectional gas flow through the leakage orifice in both expiration and inspiration phases.12-24-2009
20090020121METHODS FOR PROVIDING EXPIRATORY PRESSURE RELIEF IN POSITIVE AIRWAY PRESSURE THERAPY - A method of operating a CPAP apparatus in which the interface pressure is controlled to rapidly drop at the start of expiration by an expiratory relief pressure (ERP) that is independent of instantaneous respiratory flow, following which the pressure rises to an inspiratory level at or shortly before the end of expiration, or at the onset of an expiratory pause, if any. The ERP is an increasing function of the inspiratory pressure. The expiratory pressure follows a template that is a function of the expected expiration time, the magnitude of the template being equal to the ERP. The current estimated proportion of expiration is determined by comparing the expiration time of the breath in progress to low-pass filtered expiratory durations measured for a number of the preceding breaths.01-22-2009
20090241958METHOD FOR SELECTING TARGET SETTINGS IN A MEDICAL DEVICE - The disclosure provides a method for controlling the delivery of a breathing gas to a patient. The method may include regulating the delivery of the breathing gas delivered to the patient, determining a value for a first ventilation parameter, comparing the determined value of the first ventilation parameter to a pre-determined target value for the first ventilation parameter, automatically adjusting the breathing gas delivered to the patient in response to the comparison between the determined value of the first ventilation parameter and the pre-determined target value for the first ventilation parameter, and automatically determining a new target value for the first ventilation parameter based at least in part on the determined value of the first ventilation parameter.10-01-2009
20080264419INTEGRATED VENTILATOR WITH CALIBRATION - An integrated respiratory ventilation system and method for its calibration is described. The system includes a ventilator having air conduits, transducers adapted to emit signals proportional to the level of air pressure or air flow within the air conduits, and inspiration, expiration and exhaust ports. A processor-controlled calibrator is in communication with one or more of the air conduits. A preferred calibrator includes a water-filled outer column and a vertically aligned inner column extending into the outer column, the inner column having an upper end in communication with at least one of the ports. A processor controls the opening and closing of the ports and the level of air pressure in, and air flow from, the inner column to measure the level of transducer signals at two known pressures and two known flows. The processor uses the measured transducer signals to calibrate the transducer.10-30-2008
20090084382CATHETER POSITIONING METHOD AND COMPUTERIZED CONTROL UNIT FOR IMPLEMENTING THE METHOD - A control unit for a ventilator is arranged to receive, from each of a number of electrode pairs on an esophageal catheter a bioelectric signal having an ECG component. The control unit has a calculating unit that determines the ECG component of each of the bioelectric signals and a position unit that determines the position of the catheter in relation to the patient's diaphragm based on a comparison the amplitudes of ECG components of the bioelectric signals.04-02-2009
20090050153TUBE SYSTEM FOR VENTILATION APPLIANCES - The invention relates to a three-arm tube system (02-26-2009
20110226247Parameter Optimization in Sleep Apnea Treatment Apparatus - A method and apparatus for the optimized treatment of obstructive sleep apnea includes a controller coupled to an information storage device, a sensor and a pressure source. The pressure source is coupled to a patient airway. The controller reads information from the information storage device that represents a first operating mode defining a first pressure profile. The controller operates the pressure source to apply the pressure profile to the patient airway. The sensor generates a signal in response to changes in airflow in the patient airway. The controller analyzes the signal and selects a new operating mode in response to the analysis.09-22-2011
20090241956METHOD FOR CONTROLLING DELIVERY OF BREATHING GAS TO A PATIENT USING MULTIPLE VENTILATION PARAMETERS - The disclosure provides a method for controlling the delivery of a breathing gas to a patient. The method may include regulating the fractional inspired oxygen (FiO10-01-2009
20110139156VENTILATOR PATIENT SYNCHRONIZATION - A method and apparatus that provides an expert system for determining respiratory phase during ventilatory support of a subject. Discrete phase states are partitioned and prior probability functions and observed probability functions for each state are defined. The probability functions are based upon relative duration of each state as well as the flow characteristics of each state. These functions are combined to determine phase probabilities for each state using Bayes' theorem. The calculated probabilities for the states may then be compared to determine which state the subject is experiencing. A ventilator may then conform respiratory support in accordance with the most probable phase. To provide a learning feature, the probability functions may be adjusted during use to provide a more subject specific response that accounts for changing respiratory characteristics.06-16-2011
20090241954CONTROLLING THE OPERATION OF A RESPIRATORY GAS MONITOR - The invention concerns a method for controlling a respiratory gas monitor device, which typically comprises at least one respiratory gas analyzer, a gas sampling line, a gas pump for sucking sample(s) of respiratory gas from said gas sampling line, a power supply and a processing unit, and a pressure sensor pressure-connected to said gas sampling line and electrical-signal-connected to said processing unit. A minimum value and a maximum value in a signal from the patient are detected by said processing unit, and a difference between said minimum value and said maximum value is calculated, and is compared with a predetermined threshold value. If said calculated difference is below said threshold value said pump is switched off or kept non-operating by said processing unit, and if over said threshold value said pump is switched on or kept operating by said processing unit.10-01-2009
20090241955LEAK-COMPENSATED FLOW TRIGGERING AND CYCLING IN MEDICAL VENTILATORS - This disclosure describes systems and methods for compensating for inelastic and elastic leaks in a ventilation system. The disclosure describes a model-based enhancement to conventional flow triggering and cycling methodologies that improves the timing and patient work of flow-based triggering and cycling performance. The methods and systems described herein compensate for the leak condition and minimize additional effort a patient has to exert to generate the same patient synchrony and comfort level compared to no leak condition. One method described includes calculating an elastic leakage and an inelastic leakage based on current measurements of pressure and flow in the ventilation system and then estimating a leak-compensated lung flow using the inelastic and elastic leaks and pneumatic attributes of the patient-ventilator system.10-01-2009
20100147305System and Method for the Automatic Detection of the Expiratory Flow Limitation - The present invention refers to a system and a method for the automatic detection of the expiratory flow limitation of a subject. In an embodiment thereof the system for the automatic detection of expiratory flow limitation of a subject comprises determining the respiratory impedance of the subject comprising an imaginary component and, eventually, of a real part or, at least, by applying a forcing signal with one or more spectral components to the airway opening of a subject combined with measuring time courses of pressure and flow at the airway opening; determining at least one index linked to respiratory impedance or pressure and flow time courses; indicating the positioning of at least one index in relation to a preset threshold value.06-17-2010
20080308104Ventilator - A ventilator intended to be connected to a patient for breathing therapy has a control unit having an input for receiving EMG signals from an EMG detector and an output for an EMG based control signal and a pneumatic unit for generating breathing gas flows dependent on the EMG based control signal is described. The ventilator has a detector for determining a parameter related to breathing dynamics for the patient, this detector being connected to the control unit and control unit controlling the pneumatic unit dependent on the parameter related to breathing dynamics in the case of loss of EMG signals at the input.12-18-2008
20100147304BIO-MASK WITH INTEGRAL SENSORS - A system including a mask to detect an EEG signal and to deliver a gas, the mask having a forehead support extending from the body and adapted to contact a forehead surface of the patient during use, the forehead support having a plurality of sensors located thereon for detecting electrophysiological signals of the patient, with the plurality of sensors including EEG sensors positioned proximate to FP1/FP2 standard electrode placement positions of the patient, a gas delivery device in fluid communication with the mask and having an adjustable gas output, and a control system for determining a sleep stage from EEG signals detected by the mask and adjusting a gas delivery device based on the sleep stage.06-17-2010
20100147302Ventless Mask CPAP System - A CPAP or other ventilation system includes a mask, a flow generator, a positive or high pressure line to provide positive or high pressure air from the flow generator to the mask and a vacuum or return line provided to actively extract exhaled gas from the breathing chamber and/or the air delivery conduit of the mask. The vacuum or return line includes a vent outlet preferably positioned remote from the mask.06-17-2010
20100180897COUGHING AID DEVICE - The invention relates to a coughing aid device, comprising a first-sub-assembly (07-22-2010
20130213399RESPIRATION SYSTEM - A respiration system for noninvasive respiration includes a respiration drive, which is controlled by a control device, and includes a patient module (08-22-2013
20100258123SYSTEMS AND /OR METHOD FOR CALIBRATION -LESS DEVICE OR LESS EXPENSIVE CALIBRATION DEVICES FOR TREATING SLEEP-DISORDERED BREATHING - Systems and/or methods for treating sleep-disordered breathing (SDB) are provided. In particular, systems and/or methods are provided that include software systems for use with auto-titrating devices (e.g. APAP devices) that reduce and/or eliminate the need to calibrate the auto-titrating devices. The software system also may reduce and/or eliminate the need for certain sensors used in such calibrations. Certain example embodiments compute snore based on noises measured during expiration and inspiration, and certain example embodiments set patient leak utilizing the vent flow level. Certain example embodiments change treatment pressure thresholds after measuring patient improvement by monitoring a variable correlated with actual delivery pressure in accordance with an example embodiment, and certain example embodiments provide pressure according to motor speed in accordance with an example embodiment.10-14-2010
20100186743METHOD AND APPARATUS FOR TREATING CHEYNE-STOKES RESPIRATION - A system and method for delivering a flow of breathing gas to an airway of a patient. The system monitors a characteristic that varies based on variations of the flow of the breathing gas and determines a Target Flow for the gas to be delivered to the patient based on the monitored characteristic. The Target Flow is set to a level sufficient to treat Cheyne-Stokes respiration or a sleep disordered breathing event. The system also alters the Target Flow based on a determination that the patient is experiencing a sleep disordered breathing event. The system further determines a pressure relief component and controls the flow of gas delivered to the patient based on the Target Flow and the pressure relief component.07-29-2010
20100186742MEDICAL VENTILATOR WITH AUTONOMOUS CONTROL OF OXYGENATION - A portable critical care medical ventilator with autonomous control of oxygenation is provided. The system and method provide for significantly reducing the O07-29-2010
20100258126METHODS AND APPARATUS FOR HEART FAILURE TREATMENT - Methods and apparatus for assessing the condition of and treating patients for heart failure by the delivery of continuous positive airway pressure are disclosed. Airflow of the patient is measured to determine occurrences of central apneas. A heart failure index is calculated from a count of the number of central apneas that have occurred. The present heart failure index can be compared with a previously calculated heart failure index to determine how the patient's heart failure disease has changed and how it should be treated.10-14-2010
20090078257Auto-Titration of Positive Airway Pressure Machine With Feedback From Implantable Sensor - Systems and methods for detecting and treating an obstructive sleep apnea event are disclosed herein. The systems and methods may use an electrical output generating ionic polymer metal composite sensor attached to a region in an airway passage in an oral cavity. The electrical output may be wirelessly transmitted as a signal for indication of an obstructive sleep apnea event. The signal may be further analyzed by a positive airway pressure system for treatment of the obstructive sleep apnea event.03-26-2009
20090078255Methods for pressure regulation in positive pressure respiratory therapy - Methods of positive pressure therapy are described. The methods increase the pressure delivered to a user from a sub-therapeutic pressure to a therapeutic pressure in one or more pressure steps sequenced to the user's breath intervals.03-26-2009
20100175699RESPIRATORY SENSOR - A sensor assembly for monitoring the respiration pattern of a subject is disclosed, the sensor comprising a sensor element for exposing to a gas stream exhaled by the subject comprising a first electrode, a second electrode and an active layer extending between the first and second electrodes to provide an electrical path therebetween, the sensor element being responsive to the concentration of water vapour in the gas stream exhaled by the subject, whereby the conductivity of the path between the electrodes varies in response to changes in the concentration of water vapour; a processor for determining the pattern of respiration of the subject; and means for displaying information relating to the determined respiration pattern to a user. The sensor assembly is particular suitable for measuring the respiration rate and/or depth of respiration of the subject. The sensor and method find particular application in the diagnosis and treatment of sleep apnea.07-15-2010
20100252041METHODS, SYSTEMS AND DEVICES FOR NON-INVASIVE OPEN VENTILATION FOR PROVIDING VENTILATION SUPPORT - A system for providing ventilation support to a patient may include a ventilator, a control unit, a gas delivery circuit with a proximal end in fluid communication with the ventilator and a distal end in fluid communication with a nasal interface, and a nasal interface. The nasal interface may include at least one jet nozzle at the distal end of the gas delivery circuit; and at least one spontaneous respiration sensor for detecting respiration in communication with the control unit. The system may be open to ambient. The control unit may receive signals from the at least one spontaneous respiration sensor and determine gas delivery requirements. The ventilator may deliver gas at a velocity to entrain ambient air and increase lung volume or lung pressure above spontaneously breathing levels to assist in work of breathing, and deliver ventilation gas in a cyclical delivery pattern synchronized with a spontaneous breathing pattern.10-07-2010
20100236556VENTILATOR PATIENT SYNCHRONIZATION - A method and apparatus that provides an expert system for determining respiratory phase during ventilatory support of a subject. Discrete phase states are partitioned and prior probability functions and observed probability functions for each state are defined. The probability functions are based upon relative duration of each state as well as the flow characteristics of each state. These functions are combined to determine phase probabilities for each state using Bayes' theorem. The calculated probabilities for the states may then be compared to determine which state the subject is experiencing. A ventilator may then conform respiratory support in accordance with the most probable phase. To provide a learning feature, the probability functions may be adjusted during use to provide a more subject specific response that accounts for changing respiratory characteristics.09-23-2010
20100224192Automated Oxygen Delivery Method - The present invention advantageously provides a method of automatically delivering oxygen to a patient. A desired concentration of oxygen in a bloodstream of a patient is received from a user. Data, including a measurement of the amount of oxygen in the bloodstream of the patient, as well as status information associated with the measurement, is received from a sensor. The measured data are determined to be valid or invalid based on the measurement value and the status information, and, based on this determination, a delivered fraction of inspired oxygen is delivered to the patient. If the measured data are determined to be valid, then the delivered fraction of inspired oxygen is based on the desired oxygen concentration and the measured data. On the other hand, if the measured data are determined to be invalid, then the delivered fraction of inspired oxygen is set to a predetermined value.09-09-2010
20100275921METHODS AND APPARATUS FOR DETECTING AND TREATING RESPIRATORY INSUFFICIENCY - Devices and systems provide methods of detecting a severity change in respiratory insufficiency (RI) or chronic obstructive pulmonary disease (COPD) condition of a patient. In an example embodiment, a detection monitoring device determines one or more severity change indicators based on a measure of supplied pressure or other representative measure determined by the device. The supplied pressure may optionally be determined during pressure treatment that satisfies a target ventilation. The supplied pressure or representative data may be compared to one or more thresholds that are selected to represent a change in the condition of the RI or COPD patient such as an exacerbation of a prior condition. Results of the comparisons may trigger one or more warnings or messages to notify a patient or physician of a pending change to the patient's RI or COPD condition so that the patient may more immediately seek medical attention to treat the condition.11-04-2010
20100275920SYSTEM AND METHODS FOR VENTILATING A PATIENT - System and methods for ventilating a patient are provided. In one embodiment, the method comprises steps of placing a ventilator in a mode capable of delivering respiratory gas based on at least one fixed parameter and at least one variable parameter, the fixed parameters being tidal volume and peak airway pressure and the variable parameter being PEEP, identifying a first level for the PEEP, configuring the ventilator to deliver the respiratory gas at the peak airway pressure and the PEEP to achieve the tidal volume, monitoring respiratory gas flow over time to measure tidal volume, setting a second level for the PEEP based on the measured tidal volume, automatically adjusting the PEEP to the second level relative to the peak airway pressure and repeating the steps of configuring, monitoring, setting and automatically adjusting to achieve the ventilation.11-04-2010
20100236555LEAK-COMPENSATED PRESSURE REGULATED VOLUME CONTROL VENTILATION - This disclosure describes systems and methods for compensating for leakage when during delivery of gas to a patient from a medical ventilator in a pressure regulated volume control (PRVC) ventilation mode. The technology described herein includes systems and methods that compensate the delivery of PRVC ventilation for leakage in the patient circuit by using leak-compensated lung flows as well as respiratory mechanics (lung compliance and lung resistance) estimated in a manner that compensates for elastic and inelastic leaks from the ventilation system.09-23-2010
20130125891SYSTEM AND METHOD FOR DYNAMIC REGULATION OF OXYGEN FLOW RESPONSIVE TO AN OXIMETER - A system is provided for regulating a flow of oxygen to a patient where the system may include an oximeter for measuring the patient's blood oxygen level and/or heart rate; a controller for determining a desired oxygen flow rate based on the patient's blood oxygen level and/or heart rate, and generating a control signal representative of the desired oxygen flow rate; an oxygen flow regulator for dynamically regulating a flow rate of oxygen supplied to the patient responsive to the control signal provided by the controller; an oxygen delivery device; and a transmitter for wirelessly communicating with an electronic medical records system. The oxygen flow regulator may receive oxygen from an oxygen bottle, oxygen mixer, a wall oxygen supply of a healthcare facility, or an oxygen concentrator. One or more of the components of the system may be treated with an antimicrobial material.05-23-2013
20100242965DISTINGUISHING BETWEEN CLOSED AND OPEN AIRWAY APNEAS AND TREATING PATIENTS ACCORDINGLY - Methods and apparatus for determining the occurrence of an apnea, patency and/or partial obstruction of the airway are disclosed. Respiratory air flow from a patient is measured to give an air flow signal. The determination of an apnea is performed by calculating the variance of the air flow signal over a moving time window and comparing the variance with a threshold value. One determination of partial obstruction of the airway is performed by detecting the inspiratory part of the air flow signal, scaling it to unity duration and area and calculating an index value of the amplitude of the scaled signal over a mid-portion. Alternatively, the index value is a measure of the flatness of the air flow signal over the mid-portion. One determination of patency of the airway is performed by applying an oscillatory pressure waveform of known frequency to a patient's airway, calculating the magnitude of the component of said air flow signal at the known frequency induced by the oscillatory pressure waveform and comparing the calculated magnitude with a threshold value. Alternatively, the air flow signal is analysed to detect the presence of a component due to cardiogenic activity.09-30-2010
20100252043METHOD AND ARRANGEMENT FOR RESPIRATORY SUPPORT FOR A PATIENT AIRWAY PROSTHESIS AND CATHETER - The invention relates to a method and an arrangement for respiratory support for a patient and an airway prosthesis. The spontaneous breathing of a patient is recorded with sensors and an additional amount of oxygen administered by means of a jet gas flow at the end of a lung inhalation process. Oxygen uptake on inhalation is thus improved. Where necessary the exhalation process of the patient can be retarded by a counter-current to prevent a collapse of the airways. The above manner of proceeding is achieved by means of an arrangement, comprising an oxygen pump connected to an oxygen source and an airway prosthesis, which may be connected by means of a catheter. The spontaneous breathing of the patient is recorded by means of sensors, connected to a controller, for activating the oxygen pump. The airway prosthesis has a tubular nozzle body with a connector for the catheter, whereby two of the sensors are provided on the nozzle body. The airway prosthesis and the integrated or introduced jet catheter are of such a size that the patient may breathe and speak freely.10-07-2010
20100252038EMG-CONTROLLED VENTILATOR AND METHOD FOR THE OPERATION THEREOF - A ventilator provides breathing support to a patient in an EMG controlled mode, and has an input that receives an EMG signal representative of breathing activity from the patient and a control unit for controlling the ventilation in dependence of said EMG signal. The ventilator has a registration unit that registers the actual breathing support provided from the ventilator to the patient, and the control unit determines if there is asynchrony between the EMG signal and the breathing activity and, in case of asynchrony, causes a switch from EMG controlled ventilation to a second ventilation mode not dependent on the EMG signal. If synchrony is detected the ventilator can return to EMG controlled ventilation.10-07-2010
20100252042METHODS, SYSTEMS AND DEVICES FOR NON-INVASIVE OPEN VENTILATION FOR TREATING AIRWAY OBSTRUCTIONS - A system for reducing airway obstructions of a patient may include a ventilator, a control unit, a gas delivery circuit with a proximal end in fluid communication with the ventilator and a distal end in fluid communication with a nasal interface, and a nasal interface. The nasal interface may include at least one jet nozzle, and at least one spontaneous respiration sensor in communication with the control unit for detecting a respiration effort pattern and a need for supporting airway patency. The system may be open to ambient. The control unit may determine more than one gas output velocities. The more than one gas output velocities may be synchronized with different parts of a spontaneous breath effort cycle, and a gas output velocity may be determined by a need for supporting airway patency.10-07-2010
20110232643SYSTEM AND METHOD FOR TREATING LUNG DISEASE USING POSITIVE PRESSURE AIRWAY SUPPORT - A method of treating lung disease, such as asthma or COPD, is provided that includes determining a parameter indicative of a patient's pulmonary mechanics (such as, without limitation, airway resistance or lung compliance), and delivering positive pressure support to the airway of the patient, wherein the pressure level (which may be constant or variable) of the positive pressure support during at least a portion of the inspiratory phase of the patient is determined based on the determined parameter.09-29-2011
20090114223METHOD AND SYSTEM TO CONTROL MECHANICAL LUNG VENTILATION - The present disclosure refers to a system to control mechanical lung ventilation with volume band, more particularly a system to manage respiratory cycles in patients. Preferably, said respiratory cycles are controlled under pressure, so that the volumes as inspired by the patient are maintained within a volume range, comprising a lower volume limit and an upper volume limit, which are previously determined.05-07-2009
20090114222PROCESS FOR OPERATING A RESPIRATOR OR ANESTHESIA DEVICE IN THE APRV MODE TAKING INTO ACCOUNT THE IMPEDANCE AND/OR THE IMPEDANCE CHANGE - A process is provided for operating a respirator and/or anesthesia device in the APRV mode with at least one pressure release phase with the step of setting a first point in time for terminating the pressure release phase. The process includes measuring the electrical impedance and/or impedance change of the lungs and setting the first point in time such that the measured impedance and/or impedance change are taken into account. A device is provided for carrying out the process according to the present invention.05-07-2009
20090107501SYSTEM AND METHOD OF MONITORING RESPIRATORY AIRFLOW AND OXYGEN CONCENTRATION - Described is system and method of monitoring respiratory airflow and oxygen concentration. The system may include a first sensor producing data corresponding to an airflow in a respiratory system of a body; a second sensor producing data corresponding to an oxygen concentration in the body; a generator supplying a pressurized airflow; an oxygen source supplying oxygen; a conduit through which the pressurized airflow and oxygen are delivered to the respiratory system; and a processing arrangement for processing the data from the first and second sensors and for controlling the generator and the oxygen source based on the processed data.04-30-2009
20090020123PROCESS AND SYSTEM FOR TRANSMITTING MONITORING STATES - A process and system are provided for transmitting monitoring states between respirators. The process includes the detection of and recording of monitoring states of a monitoring unit (01-22-2009
20080230064SETTING INSPIRATORY TIME IN MANDATORY MECHANICAL VENTILATION BASED ON PATIENT PHYSIOLOGY, SUCH AS WHEN FORCED INHALATION FLOW CEASES - A method of setting inspiratory time in pressure controlled mechanical ventilation sets a subject's inspiratory time based on when the subject's forced inhalation flow ceases. Another determines when the subject's forced inhalation flow ceases and sets the subject's inspiratory time based on the determination.09-25-2008
20090107502Method and device for monitoring and improving patient-ventilator interaction - Method and apparatus for non-invasively determining the time onset (T04-30-2009
20090107498Respiratory Equipment and Method for Controlling Respiratory Equipment - The invention relates to a method and a device for operating or controlling respiratory equipment. According to the invention, a respiratory gas source, which can be connected to a patient interface, is coupled to a control unit. The control unit is configured to specify at least two different respiratory modes. The various respiratory modes are determined, selected and used for at least some respiratory disorders according to a current patient-specific requirement. The control unit is configured to automatically execute the control operations.04-30-2009
20110232644AIRWAY PRESSURE RELEASE VENTILATION - A pressure support system (09-29-2011
20120125337DEVICE FOR CALCULATING RESPIRATORY WAVEFORM INFORMATION AND MEDICAL INSTRUMENT USING RESPIRATORY WAVEFORM INFORMATION - Provided is a configuration capable of executing a detection test for a comfort level including the quality of sleep, which is measurable at home without requiring the measurement of brain waves or electrocardiogram. The respiratory waveform of a subject during sleep is continuously measured and recorded from the respiratory gas flow, etc., and is window-Fourier transformed at each measurement time to generate a frequency spectrum, and a bandwidth including a respiratory frequency is extracted. The index indicating the regularity of the respiratory period of the subject is also calculated at each time point during the sleep, and the time-dependency of this index during the sleep is represented as a graph. A medical device includes a sleep evaluation system equipped with a control means for performing control so that a sleep cycle repeated at a cycle of about 90 minutes is clearly observed if the comfort level including the quality of sleep of the subject is favorable.05-24-2012
20090050155DETERMINATION OF APNEA/HYPOPNEA DURING CPAP TREATMENT - CPAP treatment apparatus is disclosed having a controllable positive airway pressure device. A sensor generates a signal representative of patient respiratory flow that is provided to a controller. The controller is operable to determine the occurrence of an apnea from a reduction in respiratory airflow below a threshold determined from long term ventilation. When an apnea or hypopnea has occurred the calculation of the threshold is suspended until the end of that event.02-26-2009
20100300444OXYGEN CONSERVING OXYGEN DELIVERY SYSTEM - The present invention extends to methods, systems, computer program products, and circuits for conserving oxygen during the delivery of oxygen to a user. Embodiments of the invention use a microphone to detect breathing sounds indicative of different portions of a breathing cycle. Sounds not related to the breathing cycle are filtered out of the signal. Using the breathing sounds, a microprocessor differentiates inspiration from other portions of the breathing cycle. When inspiration is detected, a valve is transitioned to permit the flow of oxygen from an oxygen source to a user to deliver an appropriate bolus of oxygen. The microprocessor can also detect fault conditions, such as, for example, apnea, failure to deliver a bolus of oxygen, and restrictions in the flow of oxygen from the oxygen source to a user.12-02-2010
20100300445VENTILATOR CONTROL SYSTEM UTILIZING A MID-FREQUENCY VENTILATION PATTERN - Systems and methods are provided for providing ventilation to a patient. An air source is configured to provide pressurized air to a patient through a patient circuit according to a ventilation pattern. At least one sensor is configured to monitor a corresponding physiologic property of the patient. A ventilator control system is configured to calculate an alveolar ventilation value from the monitored physiologic property of the patient, determine at least an optimal frequency for the ventilation pattern from the calculated alveolar ventilation value, and update the ventilation pattern according to the determined optimal frequency.12-02-2010
20130139817OXYGEN REGULATION WITH AT LEAST TWO SPO2 MONITORS AND AUTOMATIC RECOGNITION OF A SIGNAL HAVING A HIGHER RATING - A process and a device for oxygen regulation of a patient having at least two SPO06-06-2013
20090078256METHOD AND APPARATUS FOR IMPROVED FLOW LIMITATION DETECTION OF OBSTRUCTIVE SLEEP APNEA - In a respiratory apparatus for treatment of sleep apnea and other disorders associated with an obstruction of a patient's airway and which uses an airflow signal, an obstruction index is generated which detects the flattening of the inspiratory portion of the airflow. The flattening index serves as an obstruction index used to differentiate normal and obstructed breathing. The obstruction index is based upon comparison of values of airflow in different sectors of the inspiratory peak of the wave function and is particularly suitable for distinguishing M shaped or square shaped respiratory patters indicative of partially obstructed airways.03-26-2009
20120145153SETUP AUTOMATION FOR RESPIRATORY TREATMENT APPARATUS - A respiratory treatment apparatus implements pressure delivery control settings by improved set-up procedures. In such an embodiment, a processor may automate setting of parameters for delivering a controlled flow of breathable gas. Data sets of pressure delivery parameter settings may be associated with one or more respiratory pathology indicators. The respiratory pathology indicators may each represent a different respiratory condition diagnosis. The processor may then prompt for an input of at least one of the respiratory pathology indicators. In response to the input, a particular set of pressure delivery parameter settings associated with the input respiratory pathology indicator may then serve as a basis for setting controls for delivering a controlled flow of breathable gas for respiratory treatment.06-14-2012
20100180898APPARATUS AND METHOD FOR SUPPLYING A RESPIRATORY GAS - An apparatus for supplying a respiratory gas to a patient within the scope of the diagnosis and/or the treatment of sleep-related breathing disorders includes an electronic signal processing device for generating a pressure control signal on the basis of indicative signals relating to the breathing activity and/or the physiological state of a person. The signal processing device comprises a signal inputting device and an extraction device for generating data field entries according to predefined signal analysis procedures. A pressure signal generator is provided for generating the pressure control signal, taking into account determined data field entries which are at least selected by the extraction device.07-22-2010
20100180896CONTROL UNIT AND DISPLAY UNIT FOR AN EMG CONTROLLED VENTILATOR - A control unit for controlling a ventilator that provides EMG controlled ventilation to a patient receives EMG signals from an esophageal catheter inserted into the patient and selects, dependent on the EMG signal, at least one signal for controlling the ventilator. A user interface unit operates by the control unit indicates the position of the catheter relative to the patient's diaphragm based on the selected signal. The position information may be presented in relation to signal curves representing the catheter signal or as an elongate vertical shape representing the catheter, the display unit being operated to indicate on the elongate vertical shape the position of the diaphragm.07-22-2010
20100180895Methods and Apparatus for Controlling Mask Leak in CPAP Treatment - A method of operating a device for treating sleep disordered breathing (SDB), wherein the device provides continuous positive airway pressure during sleep, includes determining whether treatment pressure at the patient interface is below a desired value, in response to the determining, increasing pressure generated by the flow generator, in response to the increasing, making a determination that the increase in flow generator pressure has resulted in less than a desired increase in treatment pressure at the patient interface, and in response to the determination, reducing or inhibiting further increase of the flow generator pressure.07-22-2010
20110023880Method And System For Delivering A Multi-Breath, Low Flow Recruitment Maneuver - This disclosure describes systems and methods for delivering one or more low flow recruitment maneuvers to a patient while on a ventilator. Embodiments described herein provide methods for delivering low flow recruitment maneuvers wherein either or both of the inspiratory and expiratory phases of the recruitment maneuver are maintained by the ventilator at a low flow. Embodiments described herein provide for single-breath recruitment maneuvers and multi-breath recruitment maneuvers at low flow. Embodiments described herein provide for graphical display of a pressure-volume loop (PV loop) for both single-breath and multi-breath recruitment maneuvers. Embodiments described herein also disclose an automated ventilator functionality whereby recruitment maneuvers settings and/or post-recruitment maneuver settings for resuming prescribed ventilation may be set via a graphical user interface. Other embodiments described herein enable a clinician to configure the ventilator to synchronize the end the recruitment maneuver with patient-triggered inspiration for post-recruitment maneuver ventilation.02-03-2011
20110023881Method And System For Generating A Pressure Volume Loop Of A Low Flow Recruitment Maneuver - This disclosure describes systems and methods for delivering one or more low flow recruitment maneuvers to a patient while on a ventilator. Embodiments described herein provide methods for delivering low flow recruitment maneuvers wherein either or both of the inspiratory and expiratory phases of the recruitment maneuver are maintained by the ventilator at a low flow. Embodiments described herein provide for single-breath recruitment maneuvers and multi-breath recruitment maneuvers at low flow. Embodiments described herein provide for graphical display of a pressure-volume loop (PV loop) for both single-breath and multi-breath recruitment maneuvers. Embodiments described herein also disclose an automated ventilator functionality whereby recruitment maneuvers settings and/or post-recruitment maneuver settings for resuming prescribed ventilation may be set via a graphical user interface. Other embodiments described herein enable a clinician to configure the ventilator to synchronize the end the recruitment maneuver with patient-triggered inspiration for post-recruitment maneuver ventilation.02-03-2011
20090065004Parameter Optimization in Sleep Apnea Treatment Apparatus - The present invention includes a method and apparatus for the optimized treatment of obstructive sleep apnea. The present invention includes a pressure source configured to provide positive airway pressure to a patient who is resting at home. The pressure source receives control signals from control electronics that define a pressure profile to be delivered to the patient. The control electronics select parameters to define the pressure profile based on factors such as a user selection, information received from a sensor, and/or a prescription.03-12-2009
20110209706VENTILATOR WITH LIMP MODE - A method of operating a ventilator that includes steps of (a) providing a specified ventilation therapy to a patient through a ventilator according to a specification; (b) determining and storing a backup parameter relating to the operation of the ventilator or the breathing of the patient during the step of providing the specified ventilation therapy; (c) determining that an alarm condition exists that indicates a problem with the ventilator that would prevent the ventilator from providing the specified ventilation therapy to the patient according to the specification; and (d) responsive to determining that the alarm condition exists, providing backup ventilation therapy to the patient through the ventilator that is based at least partially on the stored backup parameter. Also, a ventilator that is adapted to perform the method just described.09-01-2011
20100224191Automated Oxygen Delivery System - The present invention advantageously provides a system for automatically delivering oxygen to a patient, including a sensor to measure an amount of oxygen in a bloodstream of a patient, a pneumatics subsystem and a control subsystem. The pneumatics subsystem includes an oxygen inlet, an air inlet, a gas mixture outlet, and a gas delivery mechanism to blend the oxygen and air to form a gas mixture having a delivered oxygen concentration, and to deliver the gas mixture to the patient. The control subsystem includes an input device to receive a desired concentration of oxygen in the bloodstream of the patient, a sensor interface to receive measurement data and status information associated with the measurement data from the sensor, a pneumatics subsystem interface to send commands to, and receive data from, the pneumatics subsystem, and a processor to control the delivered oxygen concentration based on the desired oxygen concentration, the measurement data and the status information.09-09-2010
20110139155METHODS AND APPARATUS FOR MONITORING THE CARDIOVASCULAR CONDITION OF PATIENTS WITH SLEEP DISORDERED BREATHING - A method for relating to each other cardiovascular and sleep disordered breathing conditions of a patient. The patient's heart rate and/or detailed echocardiogram data is monitored and recorded continuously or periodically together with sleep disordered breathing information on similar time scales. Changes in the patient's heart rate associated with changes in sleep disordered breathing can then be observed. More specifically, positive airway pressure at therapeutic levels for treatment of sleep disordered breathing is applied while events associated with the treatment of the patient's sleep disordered breathing are detected and recorded. At the same time, information concerning the cardiovascular condition of the patient is stored and the stored information concerning the cardiovascular condition of the patient and the recorded events associated with the treatment of the patient's sleep disordered breathing are related to each other.06-16-2011
20090114224METHOD FOR AUTOMATICALLY CONTROLLING A VENTILATION OR BREATHING SYSTEM AS WELL AS A CORRESPONDING VENTILATION OR BREATHING SYSTEM - A method is provided for automatically controlling a ventilation or breathing system with a ventilation unit (05-07-2009
20110209705TRACHEAL CATHETER AND PROSTHESIS AND METHOD OF RESPIRATORY SUPPORT OF A PATIENT - A method and apparatus is described for supporting the respiration of a patient. The spontaneous respiration of a patient can be detected by sensors and during inhalation an additional amount of oxygen can be administered to the lungs via a jet gas current. If required, during exhalation a countercurrent can be administered to avoid collapse of the respiration paths. This therapy can be realized by an apparatus including a transtracheal catheter, an oxygen pump connected to an oxygen source, spontaneous respiration sensor(s) connected to a control unit for activating the oxygen pump and, if needed, a tracheal prosthesis. The tracheal prosthesis may include a connection for the catheter and the breath sensor(s). The tracheal prosthesis, if used, and the catheter can be dimensioned so the patient can freely breathe, cough, swallow and speak without restriction, and the system can be wearable to promote mobility.09-01-2011
20100186744SYSTEM AND PROCESS FOR SUPPLYING RESPIRATORY GAS UNDER PRESSURE OR VOLUMETRICALLY - The object of the invention is a device for supplying respiratory gas to a patient according to respiratory cycles, comprising a gaseous flow rate generator provided with a turbine with low inertia and high nominal speed, a first circuit called a supply circuit for the gaseous flow toward a respiratory mask or an intubation means of the patient, means for measuring pressure and/or measuring flow rate of the gaseous flow, computation means for parameters of pressure and/or flow rate, and means for controlling the speed of rotation of the generator, characterized in that the measuring means, the computation means and the speed control means coact automatically to control the speed of rotation of the turbine as a function of the inspiration and expiration phases and as a function of patient pressure signals and/or inspiration flow rate signals.07-29-2010
20090205663CONFIGURING THE OPERATION OF AN ALTERNATING PRESSURE VENTILATION MODE - Systems and methods for configuring the operation of an alternating pressure ventilation mode are provided. According to one embodiment a configuration method includes monitoring gas flow between a patient and a ventilation system. Based on the monitoring, a peak expiratory flow rate (PEFR) is determined Information indicative of values of parameters of the ventilation mode are received, including a higher pressure setting, a lower pressure setting and a duration of the higher pressure setting. User input is also received indicative of a target percentage of PEFR at which the ventilation system should cycle from the lower pressure setting to the higher pressure setting. Based on the target percentage, a duration of the lower pressure setting is programmatically determined. Finally, the ventilation system is configured to automatically cycle between the higher and lower pressure setting at a predetermined flow based on the parameters and the duration of the lower pressure setting.08-20-2009
20110247622Portable Oxygen Delivery Device - Disclosed are devices, systems, and methods, including an oxygen delivery device that includes an oxygen delivery module to produce at least concentrated oxygen, and a gas moving device to deliver air to the oxygen delivery module. The gas moving device includes at least one piston rotatable inside a first chamber defined in a housing, the rotational movement of the at least one piston inside the first chamber resulting in varying pressure generated in a first portion of the first chamber, and a vane member rigidly coupled to the at least one piston, the vane member being configured to move inside a vane chamber defined in the housing, the piston and the vane rigidly coupled to the piston define the first portion of the first chamber and a second portion of the first chamber.10-13-2011
20110247620Portable Oxygen Delivery Device - Disclosed are devices, systems, and methods, including an oxygen delivery device that includes an oxygen delivery module, at least one sensor to detect patient breathing, and a controller configured to control the oxygen delivery module to cause the oxygen delivery module to deliver oxygen to the patient based on data from the at least one sensor such that in response to a determination, based on data from the at least one sensor, that no breathing is detected for a first pre-determined period of time, the controller causes the oxygen delivery module to deliver oxygen to the patient in continuous flow mode, and in response to a determination, based on additional data from the at least one sensor, that breathing is detected for a second period of time, the controller causes the oxygen delivery module to deliver oxygen to the patient in a pulse flow mode.10-13-2011
20100065056ARESPIRATORY GAS SUPPLY CIRCUIT TO FEED CREW MEMBERS AND PASSENGERS OF AN AIRCRAFT WITH OXYGEN - The invention relates to a respiratory gas supply circuit for an aircraft carrying passengers and/or crewmembers (03-18-2010
20100065057METHOD AND APPARATUS FOR PROVIDING VENTILATORY ASSISTANCE - The apparatus provides for the determination of the instantaneous phase in the respiratory cycle, subject's average respiration rate and the provision of ventilatory assistance. A microprocessor (03-18-2010
20110067697Method and Device for Administering Oxygen to a Patient and Monitoring the Patient - A method for administering a gas containing oxygen to a patient. The method includes: measuring an oxygen-dependent physiological parameter in the patient; determining an optimal gas delivery parameter based on the oxygen-dependent physiological parameter; and administering the gas to the patient in accordance with the optimal gas delivery parameter. In some embodiment of the invention, the method also includes monitoring the oxygen-dependent physiological parameter.03-24-2011
20110100366EXTENDABLE AIR DELIVERY SYSTEM AND AIR DELIVERY METHOD - An extendable air delivery system and a method for deciding a delivery mode therein are provided. The extendable air delivery system includes a PAP device supply a breathable pressured air to a patient and a sensing device to acquire physiological information from the patient by at least a sensor. The method includes steps of initiating the PAP device, detecting if the sensing device is connected with the PAP device, and if negative, the PAP device enters a preset independent operation mode and performs a preloaded first air delivery behavior for providing the breathable air to the patient, or if positive, the PAP device enters a common operation mode. During the common operation mode, based on the acquired physiological information, the sensing device generates a signal/data for sending to the PAP device, and the signal/data involves in deciding a second air delivery behavior for providing the patient the breathable air. And, the above steps are repeated during the air delivery.05-05-2011
20110100365Respiratory device and method for controlling a respiratory device - The invention relates to a respiratory device comprising a respiratory gas source (05-05-2011
20110000489CONTROL UNIT, METHOD AND COMPUTER-READABLE MEDIUM FOR OPERATING A VENTILATOR - To set trigger conditions correctly in pneumatic mode, a ventilator is controlled to obtain a measurement value of a bioelectric signal representative of the patient's breathing function, determine, based on the bioelectric signal, at least one point in time at which the patient starts inhalation, obtain a measurement value to be used for triggering an inspiration phase in the ventilator during the at least one point in time, determine a trigger condition for the inspiration phase on the basis of the measurement value, and use the trigger condition for initiating inspiration when ventilating the patient in support mode.01-06-2011
20100258124Method and device for carrying out a signal-processing viewing of a measurement signal that is correlated to the respiratory activity of an individual - The invention relates to a method and device for carrying out a signal-processing viewing of a measurement signal that is correlated with the respiratory activity of an individual, for example, of a measurement signal that is correlated with the respiratory gas. The aim of the invention is to provide solutions with which an improved electronic analysis of the signals that are representative with regard to respiratory activity can be achieved. To this end, the invention provides that viewing results are obtained within the scope of a signal-processing viewing of said measurement signal and make a differentiation between obstructive and central respiratory disorders possible. The viewing results are determined, in particular, while taking into account changes of selected breathing characteristics such as, for example, the change in the ratio of inhalation time to exhalation time.10-14-2010
20100252039METHODS, SYSTEMS AND DEVICES FOR NON-INVASIVE OPEN VENTILATION WITH GAS DELIVERY NOZZLES IN FREE SPACE - A non-invasive ventilation system may include an interface. The interface may include at least one gas delivery jet nozzle adapted to be positioned in free space and aligned to directly deliver ventilation gas into an entrance of a nose. The at least one gas delivery jet nozzle may be connected to a pressurized gas supply. The ventilation gas may entrain ambient air to elevate lung pressure, elevate lung volume, decrease the work of breathing or increase airway pressure, and wherein the ventilation gas is delivered in synchrony with phases of breathing. A support for the at least one gas delivery jet nozzle may be provided. A breath sensor may be in close proximity to the entrance of the nose. A patient may spontaneous breathe ambient air through the nose without being impeded by the interface.10-07-2010
20090007915APPARATUS FOR REGULATING A MECHANICAL VENTILATION - The invention relates to a device, with which one is to prevent a patient who breathes on Ms own and who desires a lower CO01-08-2009
20100258125Respirator and/or Anesthetic Device - A respirator and/or anesthesia device is provided having internal sensors and at least one respirator connection for the patient as well as an output unit, wherein at least one external sensor can be attached to the patient and its measured values that correlate with the measured values of the internal sensors can be displayed and evaluated.10-14-2010
20110247621Portable Oxygen Delivery Device - Disclosed are devices, systems, and methods, including an oxygen delivery device that includes an oxygen delivery module configured to deliver a pulse including greater than 100 mL of concentrated oxygen, and a controller configured to control the oxygen delivery module to cause the oxygen delivery module to deliver the pulse including greater than the 100 mL of the concentrated oxygen within approximately first 60% of a patient's inspiratory period. Also disclosed is a device that includes an oxygen delivery module, a piezoelectric valve coupled to an output of the oxygen delivery module to receive the concentrated oxygen, a driver to electrically actuate the piezoelectric valve, and a controller to control the driver to cause controllable actuation of the piezoelectric valve by the driver to cause controllable opening of the valve to enable oxygen flow to be directed for inhalation by a patient via the piezoelectric valve.10-13-2011
20090126736In-home medical data collection and reporting system - The invention is an oxygen system, including a home care system, for patients who require supplemental oxygen. Built around an intelligent portable oxygen concentrator, the system incorporates a variety of patient monitoring and reporting function enabled by the processing and communications channels built into the concentrator.05-21-2009
20080314385O2 - Controller - The invention relates to a device for the regulation of PEEP and FiO12-25-2008
20110041851DEVICE FOR DETECTING ELECTRICAL POTENTIALS OF THE FOREHEAD REGION OF A PATIENT - A device for detecting electrical potentials in the forehead area of a patient has a transverse member adapted to rest against the forehead of the patient, a vertical member extending crosswise to the transverse member and a mask on the vertical member. Electrodes are provided on the transverse members at least at its ends and at the center at which the vertical bar crosses the transverse member.02-24-2011
20110041850Method For Ventilation - The disclosure describes a method for automatically initiating ventilation, controlling ventilation, transitioning a ventilator to subject controlled ventilation, and weaning a subject from ventilation. The disclosure describes that the method for automatically initiating ventilation includes inputting a physical characteristic of the subject into a ventilator. The physical characteristic may be ideal body weight, height, or age. Based on the inputted physical characteristic, one or more ventilation parameters are calculated. The disclosure describes initiating ventilation based on the calculated parameters. During ventilation at least one physiological parameter of the subject is monitored. At least one ventilation parameter may be adjusted based on the monitoring of the physiological parameters and the inputted physical characteristic.02-24-2011
20110041849SYSTEMS AND METHODS FOR CONTROLLING A VENTILATOR - A method and system for controlling a ventilator is disclosed. Oxygen saturation values from pulse oximeters may be used to adjust the settings of a ventilator. Multiple sensors and multiple oxygen saturation values in a fault tolerant pulse oximeter configuration may be used to provide a backup value or confidence measure, thereby increasing reliability and patient safety.02-24-2011
20120199126Modification of Sympathetic Activation and/or Respiratory Function - Devices, systems and methods are disclosed for modifying sympathetic activation of a patient through alteration of respiratory function. In one form, a sub-apneic ventilation target for a ventilator is determined such that chronic sympathetic activation of the patient is mitigated.08-09-2012
20080230065METHOD AND SYSTEM FOR MONITORING PATIENT'S BREATHING ACTION RESPONSE TO CHANGES IN A VENTILATOR APPLIED BREATHING SUPPORT - A method for monitoring patient's breathing action response to changes in a ventilator applied breathing support, where a) a desired target range for a breathing gas indication of O2-consumption for the patient is first determined, after which b) the ventilator applied breathing support is changed, and c) the breathing gas indication of O2-consumption of said patient is measured and d) compared with the desired target range. At least the steps b)-d) are repeated to maintain the measured breathing gas indication of O2-consumption of said patient within the desired target range. A system for monitoring a patient's breathing action is also provided.09-25-2008
20100282257Fluid Mixing Apparatus With an Improved Mixer - A fluid mixing apparatus is provided. The apparatus has a mixing volume, a primary inlet, secondary inlet, and an outlet are provided for the volume. The secondary inlet includes a valve which is adapted to be operated by a driver to pulse width modulate the valve between two flow states to achieve a given flow state through the secondary inlet.11-11-2010
20110108034METHOD AND SYSTEM FOR CONTROLLING A VENTILATOR - A method and system for controlling a ventilator. The method includes monitoring a central nervous system parameter and automatically adjusting a level of ventilatory support from a ventilator based on a value of the central nervous system parameter.05-12-2011
20110132368Display Of Historical Alarm Status - This disclosure describes embodiments of alarm systems and methods for use in devices such as medical ventilators. Embodiments described provide for an apparatus of an interactive multilevel alarm system. Embodiments of the alarms also provide, at a glance, current alarm and device status information and historical alarm information to the operator. Embodiments also direct interaction with the alarming functions of the device by the operator. In some embodiments, additional visual indicators may be provided to identify non-normal or noteworthy operating conditions, such as the use of a therapeutic gas by a mechanical ventilator, so that the operator can assess the impact of that non-normal condition on any current and historical alarm information simultaneously provided.06-09-2011
20110132369Ventilation System With System Status Display - The disclosure describes a novel approach for displaying information on a ventilator system. The disclosure describes a novel system including a removable primary display and system status display. Further, the disclosure describes a novel method for displaying ventilator information and a novel method for controlling a ventilator system.06-09-2011
20120199125Positive Airway Pressure System With Head Control - The invention is directed to a positive airway pressure (PAP) system with a head mounted harness assembly with a housing and a head position sensor located within or secured to the housing that detects the position of a patient's head, and communicates this head position information to a controller of the system which may be disposed within the housing having the position sensor or a second housing. The controller varies the output pressure of the pressure source, e.g. a rotary compressor, based, at least in part, on the head position information provided by the head position sensor. In a preferred embodiment, the position sensor is an accelerometer.08-09-2012
20120199124Positive Airway Pressure System With Head Position Control - The invention is directed to a positive airway pressure (PAP) system with a head mounted harness assembly with a housing and a head position sensor located within or secured to the housing that detects the position of a patient's head, and communicates this head position information to a controller of the system which may be disposed within the housing having the position sensor or a second housing. The controller varies the output pressure of the pressure source, e.g. a rotary compressor, based, at least in part, on the head position information provided by the head position sensor. In a preferred embodiment, the position sensor is an accelerometer.08-09-2012
20100252040METHODS, SYSTEMS AND DEVICES FOR NON-INVASIVE OPEN VENTILATION WITH GAS DELIVERY NOZZLES WITHIN AN OUTER TUBE - A non-invasive ventilation system may include at least one outer tube with a proximal lateral end of the outer tube adapted to extend to a side of a nose. The at least one outer tube may also include a throat section. At least one coupler may be located at a distal section of the outer tube for impinging at least one nostril and positioning the at least one outer tube relative to the at least one nostril. At least one jet nozzle may be positioned within the outer tube at the proximal lateral end and in fluid communication with a pressurized gas supply. At least one opening in the distal section may be adapted to be in fluid communication with the nostril. At least one aperture in the at least one outer tube may be in fluid communication with ambient air. The at least one aperture may be in proximity to the at least one jet nozzle.10-07-2010
20100282259THREE-DIMENSIONAL WAVEFORM DISPLAY FOR A BREATHING ASSISTANCE SYSTEM - An apparatus configured to display a three-dimensional representation of a waveform for a breathing assistance system may include a processor and a display device. The processor may be configured to receive signals from one or more sensors over a plurality of time periods and generate multiple instances of a waveform based on the received signals, each instance corresponding to one of the plurality of time periods. The display device may be configured to cooperate with the processor to display a graphical three-dimensional representation of the waveform over time. The three-dimensional representation may include graphical representations of the multiple instances of the waveform displayed simultaneously.11-11-2010
20100282258METHOD AND APPARATUS FOR PROVIDING PULSES INHALATION OF 17O2 FOR MAGNETIC RESONANCE IMAGING OF CEREBRAL METABOLISM - Prior approaches have delivered O11-11-2010
20110186050Method and System for Controlling Breathing - The present invention relates to a method and a system for controlling breathing of a patient. A system for controlling breathing of a patient includes a respiratory conduit. The respiratory conduit is configured to be coupled to a patient interface device and is further configured to be coupled to a pressurized air generating device. The respiratory conduit includes at least two air flow control devices, positioned between the patient interface device and the pressurized air generating device. The respiratory conduit includes at least two volumes, wherein one volume is positioned between a first air flow control device and a second air flow control device and another volume is positioned between a second air flow control device and a third air flow control device.08-04-2011
20100024820Pressure-Controlled Breathing Aid - The ventilation module (02-04-2010
20100024819APPARATUS, METHOD, SYSTEM AND COMPUTER PROGRAM FOR LEAKAGE COMPENSATION FOR A VENTILATOR - A ventilator apparatus, method, system, and computer program for determining leakage in a flow circuit providing pressurized gas to a patient having breathing disorder. The present invention determines the leakage by calculating a ratio between a measured flow of gas and a determined flow of gas related to a standard leakage. The determined standard leak flow may be calculated from a formula derived from Bernoulli's theorem. The invention may further be arranged to use a volume difference between inspiration and expiration phases in the compensation process.02-04-2010
20120145154SYSTEM AND METHOD FOR QUANTIFYING LUNG COMPLIANCE IN A SELF-VENTILATING SUBJECT - The lung compliance of a subject that is at least partially self-ventilating is determined. The quantification of lung compliance may be an estimation, a measurement, and/or an approximate measurement. The quantification of lung compliance may be enhanced over conventional techniques and/or systems for quantifying lung compliance of self-ventilating subjects in the lung compliance may be quantified relatively accurately without an effort belt or other external sensing device that directly measures diaphragmatic muscle pressure, and without requiring the subject to manually control diaphragmatic muscle pressure. Quantification of lung compliance may be a useful tool in evaluating the health of the subject, including detection of fluid retention associated with developing acute congestive heart failure.06-14-2012
20120145152INTEGRATED PULMONARY INDEX FOR WEANING FROM MECHANICAL VENTILATION - There is provided herein a system for weaning a patient from mechanical ventilation (MV), the system comprising a ventilation device and a controller comprising an interface module configured to receive two or more measured patient parameters, wherein at least one measured patient parameters parameter comprise a CO06-14-2012
20100089397BREATH RESPONSIVE POWERED AIR PURIFYING RESPIRATOR APPARATUS - Breathing responsive powered air purifying respirator apparatus comprising an air-tight housing having connections for filters (04-15-2010
20100018530METHOD AND APPARATUS FOR DETECTING AND TREATING HEART FAILURE - Devices and systems provide methods of detecting a heart failure condition of a patient that may be based on one or more respiratory parameters of a patient. In an example embodiment, a monitoring device determines one or more heart failure condition indicators based on a measure of the patient respiratory airflow and/or a measure of treatment pressure. Respiratory parameters such as respiration rate, hypopneas, apneas, Cheyne-Stokes breathing patterns or apnea-hypopnea counts may be compared to thresholds that are selected to represent a change in the condition of a heart failure patient such as an onset of a decompensation event. Results of the comparisons may trigger a pressure treatment change and/or one or more warnings or messages to notify a patient or physician of a pending change to the patient's heart failure condition so that the patient may more immediately seek medical attention to treat the heart failure condition.01-28-2010
20090173347PRESSURE SUPPORT VENTILATION OF PATIENTS - A methodology and apparatus for determining ventilator settings including an end expiratory pressure setting, pressure swing, resistive unloading and target ventilation for delivering ventilatory support based upon generalized patient ventilation characteristics and/or disease classifications. An apparatus may be programmed with the instructions to accomplish the methodology interactively by prompting the user/physician during setup and calculating settings based upon measurements or input responses. Pre-assigned values associated with ventilation characteristics or disease classifications may be combined with a base pressure value or measured values to provide patient customized settings or adjustments to determine pressure levels for the delivery of ventilatory support.07-09-2009
20100192952Methods and Devices for Central Photoplethysmographic Monitoring Methods - Disclosed herein are methods and devices for delivering gas to a subject and obtaining plethysmograph readings from a subject. Specifically disclosed herein are masks and helmets which comprise one or more pulse oximeter probes associated therewith. The masks and helmets may be used in particular contexts, including, but not limited to, emergency responder personnel, pilots or subjects of medical attention.08-05-2010
20090095299Sleep inducing apparatus for a CPAP machine - A continuous positive airway pressure (“CPAP”) machine has an electrically driven air pump, an air hose coupled to the air pump, and a air mask coupled to the air hose and adapted to be applied to a head of a patient to supply a stream of air to breathing passages of said patient while the patient is sleeping. A device, attached to said machine, is provided for inducing sleep in said patient.04-16-2009
20120037159DETECTION OF ASYNCHRONY - A controller or processor(s) (02-16-2012
20120304995Previous Set Up Mode Parameter Retention - The present application describes a previous mode button that allows a clinician to select any previously administered ventilation mode for a patient such that the previously input ventilation parameters for the selected ventilation mode will be used during ventilation. Upon receiving the selection of the previous mode button, a first stored previous mode and first ventilation parameters associated with the first stored previous mode are displayed. A determination is then made as to whether the displayed first stored previous mode is an appropriate mode. If the displayed first stored previous mode is an appropriate mode, ventilation is administered using the first stored previous mode and first ventilation parameters. If a determination is made that the first stored previous mode is not appropriate, a second stored previous mode is retrieved and displayed.12-06-2012
20120304997LEAK-COMPENSTATED PROPORTIONAL ASSIST VENTILATION - This disclosure describes systems and methods for compensating for leakage when during delivery of gas from a medical ventilator in a proportional assist mode to a patient. The technology described herein includes systems and methods to compensate the delivery of PA ventilation for leakage in the patient circuit by using leak-compensated lung flows as well as leak-compensated respiratory mechanics parameters (lung compliance and lung resistance) estimated in a manner that compensates for elastic and inelastic leaks from the ventilation system.12-06-2012
20120304996Compressed Air Control Device for a CPAP Device and Corresponding CPAP System - The present invention relates to a compressed air control device for a CPAP device and to a corresponding CPAP system. The compressed air control device comprises: a pressure measuring device (12-06-2012
20120304998RESPIRATORY APPARATUS WITH IMPROVED FLOW-FLATTENING DETECTION - In a respiratory apparatus for treatment of sleep apnea and other disorders associated with an obstruction of a patient's airway and which uses an airflow signal, an obstruction index is generated which detects the flattening of the inspiratory portion of the airflow. The obstruction index is used to differentiate normal and obstructed breathing. The obstruction index is based upon different weighting factors applied to sections of the airflow signal thereby improving sensitivity to various types of respiration obstructions.12-06-2012
20110315141INTRA-ORAL CONTINUOUS POSITIVE AIRWAY PRESSURE (CPAP) INTERFACES - The present invention provides intra-oral interfaces, systems and methods for preventing sleep apnea, the interfaces comprises a conduit adapted to receive continuous positive airway pressure (CPAP) from a CPAP source, and for delivering positive air pressure to a mouth of a patient, a mouthpiece through which the conduit extends, the mouthpiece having a portion configured to reside between the teeth and inner part of the lips and cheeks in the mouth of the patient; and an active seal associated with the mouthpiece, the active seal having at least a portion thereof adapted to reside in a buccal vestibulum of the patient, the active seal being configured to bulge and contract as the patient breathes.12-29-2011
20110315140PORTABLE OXYGEN CONCENTRATOR - A vacuum pressure swing absorption system provides portable oxygen to medical patients. A pair of sieve beds are alternately pressurized with air and evacuated by vacuum by coordinated operation of a selector valve and a vent valve. Product gas flows from both sieve beds through respective check valves to a product tank. An equalization valve is operated in coordination with the selector valve and the vent valve to open a flow path between the sieve beds and allow pressure to equalize therebetween. Operation of the vent valve is time to occur after pressure in the sieve beds has equalized. Components of the concentrator are tuned so that the equalization pressure occurs at about zero pounds per square inch (psi). This reduces energy loss due to free expansion of gasses and reduces noise created by the venting of gasses to the ambient atmosphere.12-29-2011
20080202528Pressure Support System with Automatic Comfort Feature Modification - A pressure support system that delivers a flow of gas to a patient's airway via a pressure generating system and a patient circuit. A controller receives a treatment set point from an input source and determines an adjusted treatment set point based on the treatment set point and a comfort feature function, which in one embodiment, is not based on a physiological condition of such a patient. In another embodiment, the controller provides a respiratory treatment therapy during a therapy session based on the treatment set point and the comfort feature, which is modified automatically during a therapy session without user intervention based on a comparison of the treatment set point to a treatment set point variable. The controller controls the operation of the pressure generating system based on the adjusted treatment set point or the combination of the treatment set point and the comfort feature.08-28-2008
20110155134SESSION-BY-SESSION ADJUSTMENT OF A DEVICE FOR TREATING SLEEP DISORDERED BREATHING - A method is disclosed for operating a device that treats sleep disordered breathing (SDB) during successive treatment sessions, where the device provides continuous positive airway pressure during sleep. The method comprises the steps of applying a constant treatment pressure during a first session and deriving a sleep disorder index (SDI) representative of the number of SDB episodes that occurred during the first session. If the treatment pressure should be increased based upon the derived SDI, it is increased during a second, subsequent session.06-30-2011
20120006327Method and Device for Determining a Level of Ventilatory Assist to a Patient - A method and device for determining a level of ventilatory assist to be delivered to a patient by a mechanical ventilator in response to a measure of a patient's neural respiratory drive multiplied by an amplification factor, wherein an existing predicted ventilatory assist pressure is calculated and an existing resulting pressure delivered to the patient by the mechanical ventilator is measured. The amplification factor is changed from an existing amplification factor to a new amplification factor, a new predicted ventilatory assist pressure is calculated using the new amplification factor, and a new resulting pressure delivered to the patient by the mechanical ventilator after the amplification factor has been changed is measured. The new and existing predicted ventilatory assist pressures are compared to determine an anticipated change in pressure that will be delivered to the patient, and the new and existing resulting pressures are compared to determine an actual change in pressure delivered to the patient by the mechanical ventilator. The anticipated and actual changes in pressure are compared and a decision to increase, maintain or decrease the amplification factor is delivered in response to the comparison between the anticipated change and the actual change in pressure.01-12-2012
20120012110METHODS AND APPARATUS FOR VARYING THE BACK-UP RATE FOR A VENTILATOR - A ventilator device delivers ventilatory support to a patient in a back up timed mode when patient respiration is not detected or a spontaneous mode when patient respiration is detected. The timing threshold governing the back-up mode is chosen to deviate from normal expected respiration time for the patient to promote patient initiated ventilation in the spontaneous mode but permit back-up ventilation in the event of apnea. Automated adjustments to the timing threshold during the timed mode are made from the less vigilant timing threshold to a more vigilant threshold at or near a timing of normal expected breathing of the patient. Such adjustments may be made from a minimum to a maximum vigilance timing settings or incrementally there between as a function of time in the timed mode which is preferably the number of delivered machine breaths.01-19-2012
20120055478POSITIVE PRESSURE THERAPY SYSTEMS AND METHODS - Described herein are various embodiments of an oxygen concentrator system. In some embodiments, an oxygen concentrator system may be used to provide oxygen enriched gas to a patient undergoing positive pressure therapy.03-08-2012
20120055479RESPIRATOR AND ADJUSTMENT METHOD FOR SAME - A respirator for respiration of a patient having an interface (03-08-2012
20120055477OXYGEN CONCENTRATOR APPARATUS CONFIGURED FOR HIGH ALTITUDE USE - Described herein are various embodiments of an oxygen concentrator system. In some embodiments, an oxygen concentrator system includes a controller that compensates for the ambient pressure.03-08-2012
20090107500Portable Oxygen Concentrator System and Method Including Concentrated Oxygen Flow Delivery - A portable oxygen concentrator system weighing 4-20 pounds adapted to be readily transported by a user and for delivering oxygen to lungs of the user includes a rechargeable energy source; a concentrator powered by said energy source and adapted to convert ambient air into concentrated oxygen gas for said user; and a control unit that controls the concentrator to deliver a flow rate based on at least one of a Body Temperature Pressure Dry (BTPD) condition, a Body Temperature Pressure Saturated with water (BTPS) condition, and a condition between BTPD and BTPS, where relative humidity is 0-100%, to maintain a constant fraction of inspired oxygen (FI02) in the lungs of the user.04-30-2009
20120060840VENTILATION SYSTEM - A ventilation system having a processor in communication with a mechanical ventilator and a user interface for allowing an individual to operate the system with little or no respiratory care expertise until a respiratory care practitioner can take over operation is disclosed. The ventilation system further includes a function that permits seamless transition between modes of operation.03-15-2012
20120118290Detection of Dynamic Hyperinflation in Spontaneously Breathing Mechanically Ventilated Patients - A method and device for determining dynamic hyperinflation during mechanical ventilation of a spontaneously breathing patient, wherein mechanical ventilation is removed during one breath of the patient, inspiratory and expiratory volumes of the patient are measured during the one breath, and a difference between the inspiratory and expiratory volumes measured during the one breath is calculated. Dynamic hyperinflation of the patient's lungs is indicated in relation to the calculated difference.05-17-2012
20080276939Delta Flow Pressure Regulation - A method, system, apparatus, and computer program for detecting breathing pattern changes and controlling a mechanical ventilator in accordance to changes of breathing air flow thus reducing the work of breathing for the patient.11-13-2008
20100147303DETERMINATION OF PATIENT CIRCUIT DISCONNECT IN LEAK-COMPENSATED VENTILATORY SUPPORT - This disclosure describes systems and methods for detecting disconnect conditions in a ventilator. The disclosure describes a model-based enhancement to conventional disconnect detection. The methods and systems described herein compensate for the additional leakage that occurs due to inelastic and elastic leaks in the ventilation system. One method described includes calculating the actual leakage from the ventilation system including leaks from elastic leakage and inelastic leakage based on measurements of pressure and flow in the ventilation system for a breath and then comparing this leakage to a calculated hypothetical maximum allowable leakage determined based on an operator-selected maximum allowable leakage and the measurements of pressure for the same breath. Disconnection is assumed if the actual leakage is greater than the maximum allowable leakage.06-17-2010
20110094512AUTOTITRATING METHOD AND APPARATUS - An apparatus and method of controlling the delivery of therapeutic gas delivered to a patient undergoing positive airway pressure therapy is described. The method includes providing a flow of gas to a patient's airway at a pressure, obtaining information from the range of 0 to 25 Hz of the frequency domain of the flow, and adjusting the pressure based on the information. The apparatus includes a blower for providing a flow of gas to a patient's airway at a pressure, a sensor to measure a characteristic of the flow, a controller to obtain information from the range of 0 to 25 Hz of the frequency domain of the characteristic, and a pressure regulator for adjusting the pressure based on the information.04-28-2011
20120152250PROCESS FOR THE AUTOMATIC CONTROL OF A RESPIRATOR - A process is provided for the automatic control of a respirator for changing over (triggering) between consecutive phases of respiration (inspiration and expiration phases), wherein a pneumatic breathing activity signal u06-21-2012
20120152252AUTO-TITRATION BI-LEVEL PRESSURE SUPPORT SYSTEM AND METHOD OF USING SAME - A bi-level pressure support system and method of treating disordered breathing that optimizes the pressure delivered to the patient during inspiration and expiration to treat the disordered breathing while minimizing the delivered pressure for patient comfort. The pressure generating system generates a flow of breathing gas at an inspiratory positive airway pressure (IPAP) during inspiration and at an expiratory positive airway pressure (EPAP) during expirations. A controller monitor at least one of the following conditions: (1) snoring, (2) apneas, (3) hypopneas, or (4) a big leak in the pressure support system and adjusts the IPAP and the EPAP based on the occurrence of any one of these conditions.06-21-2012
20120152251PROCESS FOR THE AUTOMATIC CONTROL OF A RESPIRATOR - A process for automatic control of a respirator changes between two phases of respiration by checking a detected respiratory breathing activity signal for a threshold criterion. If the threshold criterion is met, a changeover is made. A dynamic threshold curve, used for changing over into an inspiration phase, is held, after the beginning of the present expiration phase, at high values until the end of a selected inspiratory refractory period, and is then lowered monotonically, dropping to an inspiratory threshold target value at the expected point in time of the phase duration maximum of the present expiration phase. A dynamic threshold curve, which is held at low values, after the beginning of the present inspiration phase, until the end of a selected expiratory refractory period, is raised monotonically, increasing to an expiratory threshold target value at the expected point in time of the phase duration maximum of the present inspiration phase and is then changed over into the expiration phase when the breathing activity signal drops below the threshold curve for the expiration. The phase duration of the inspiration and expiration phases or breath duration (inspiration and expiration phases) is stored in each case, and the expected points in time of the phase duration maxima are derived from the distributions of the phase durations in relation to the beginning of the respective phase of respiration or from the distribution of the breath durations in relation to the beginning of the previous phase of respiration.06-21-2012
20120152249PROCESS FOR THE AUTOMATIC CONTROL OF A RESPIRATOR - A process for the automatic control of a respirator with a changeover between phases of respiration (inspiration and expiration), by a control unit checking a breathing activity signal for a threshold criterion. If the threshold criterion is met, a changeover is made and the control unit controls the fan of the respirator such that a pneumatic respiration variable (airway pressure, flow) is brought from an actual value to a preset target value for the new phase of respiration. The control unit further divides the change in the respiration variable, from the actual value to the target value, into a plurality of partial steps and checks the current breathing activity signal for the threshold criterion after each partial step. If this threshold criterion is no longer met, the state of operation of the respirator returns to the state before the last changeover, and otherwise, continues with the next partial step.06-21-2012
20120103337Device and Methods for Applying Therapeutic Protocols to Organs of the Cardiopulmonary System - The invention is a device for the introduction of a fluid into a human's airway. The air so introduced has a carefully modulated envelope of pressure vs. time, this envelope generally consisting of sequences of pressurized air packets of controlled frequency and pressures. The device produces these packets by means of pressurized air occluded by a shutter action which “chops” and interrupts the fluid stream. The vibrations induced by the device within human organs have been shown to have beneficial effects on various bodily systems, such as increase in heart rate variability, increase in absorbed oxygen, decrease in absorbed CO2, and the like.05-03-2012
20110088694Integrated, Extendable Anesthesia System - The specification describes anesthesia systems with an integrated, extendable clinical center and clinician/anesthesia office that accommodates for physical separation of clinical and clerical functions. The disclosed anesthesia systems allow for a portion of the system to be brought closer to the patient such that clinical controls can be accessed while tending to the patient airway, without compromising office space available to the clinician or crowding the patient area.04-21-2011
20120125336ADJUSTMENT OF VENTILATOR PRESSURE-TIME PROFILE TO BALANCE COMFORT AND EFFECTIVENESS - The invention is a ventilator whose servo-controller adjusts the degree of support by adjusting the profile of the pressure waveform as well as the pressure modulation amplitude. As the servo-controller increases the degree of support by increasing the pressure modulation amplitude, it also generates a progressively more square, and therefore efficient, pressure waveform; when the servo-controller decreases the degree of support by decreasing the pressure modulation amplitude, it also generates a progressively more smooth and therefore comfortable pressure waveform.05-24-2012
20120247472Systems and Methods for Diagnosing and Treating Sleep Disorders - A method for diagnosing and treating sleep disorders with a sleep therapy auto-titrator for in-home use by the patient includes the step of collecting, recording and analyzing sleep data in real time with the auto-titrator. Corrective action is provided in real time to the patient to mitigate sleep events based upon the collected sleep data. The collected sleep data is transmitted, via a global computer information system, to a remote server for storage. The stored sleep data is analyzed by a computer programmed with an algorithm to monitor therapy effectiveness daily and for identifying one or more therapy intervention recommendations. An alert is provided to at least one of the patient or a sleep therapy professional associated with the patient communicating the one or more intervention recommendations.10-04-2012
20120247471Systems And Methods For Automatic Adjustment Of Ventilator Settings - Various embodiments of the present disclosure provide systems, methods and devices for respiratory support. As one example, a ventilation system is disclosed that includes a computer readable medium including instructions for operating in a hybrid mode. These instructions include measuring patient effort during a spontaneous breath type and deriving a neural inspiratory time from the measurements of patient effort. This neural inspiratory time is then set as the inspiratory for a breath of a mandatory breath type. If new patient effort measurements are received by the ventilator, the neural inspiratory time may be adjusted.10-04-2012
20120211008SYSTEMS AND METHODS FOR MANAGING PRESSURE IN A BREATHING ASSISTANCE SYSTEM - A breathing assistance system for providing breathing assistance to a patient is provided. The breathing assistance system may include a ventilation system for supplying a gas flow, a conduit operatively coupled to the ventilation system, and a pressure sensor configured to measure the pressure of the gas flow through the conduit. The pressure sensor may include a structure configured to create a localized pressure drop in the gas flow proximate the pressure sensor structure.08-23-2012
20120160244ADAPTABLE OXYGEN REGULATOR SYSTEM AND METHOD WITH AN ELECTRONIC CONTROL DEVICE - A system and method for an adaptable oxygen regulator with an electronic control device is disclosed. In one embodiment, an oxygen regulator system includes an electronic control device which includes a non-volatile memory for storing a first reference point. The electronic control device also includes a pressure sensor configured for generating pressure data of the pressurized aircraft cabin. The electronic control device further includes a logical control unit for generating a control signal by processing the first reference point and the pressure data. Further, the electronic control unit includes a rotary actuator for generating a rotary displacement based on the control signal. Moreover, the oxygen regulator system includes a demand dilution oxygen regulator coupled to the electronic control unit and configured to control the supply of oxygen and the flow of dilution air from the pressurized aircraft cabin based on the control signal.06-28-2012
20120160243MACRO-CONTROL OF TREATMENT FOR SLEEP DISORDERED BREATHING - A method and apparatus for treating sleep disordered breathing. An arousal index is determined for use in an outer loop of a control algorithm, the arousal index being a measure of the frequency of sleep arousals. The respiratory airflow signal in an inner loop of the control algorithm is monitored to detect an airway obstruction. If the arousal index is high, then the sensitivity of obstruction detection and/or the aggressiveness of the treatment is increased, and if the arousal index is low, then the sensitivity of the obstruction detection and/or the aggressiveness of the treatment is decreased.06-28-2012
20100051029Inverse Sawtooth Pressure Wave Train Purging In Medical Ventilators - This disclosure describes systems and methods for purging narrow diameter sensor tubing, occasionally referred to as “sensor lines”, in a ventilation system. The disclosure describes a novel approach in which a series of short, periodic releases of pressurized gas through the sensor tubes are used to clear any blockages due to condensation or patient secretions.03-04-2010
20100051030System and Method for Controlling Bolus Pulse Duration Based on Inspiratory Time in an Oxygen Concentration System - A method of controlling bolus delivery in a pulse flow oxygen concentration system for a patient includes providing a pulse flow oxygen concentration system that delivers concentrated oxygen gas to the patient in boluses having a pulse bolus duration, the pulse flow oxygen concentration system including an open control for controlling the pulse bolus duration of the boluses; determining one or more respiratory conditions of the patient; and adjusting the open control to adjust the pulse bolus duration of the boluses in accordance with the determined one or more respiratory conditions of the patient.03-04-2010
20120216811Use of Multiple Spontaneous Breath Types To Promote Patient Ventilator Synchrony - The present disclosure combines the advantages of a hybrid mode of ventilation with an automatic determination of an appropriate spontaneous breath type in response to one or more patient based criteria. Specifically, when the ventilator is delivering a spontaneous breath type, a determination may be made as to whether predetermined ventilatory criteria have been met. Based on the determination the ventilator may deliver one of any number of spontaneous breath types.08-30-2012
20100031959METHOD AND SYSTEM FOR MONITORING SLEEP - A method of monitoring sleep of a sleeping subject is disclosed. The method comprises determining a phase shift of input radiofrequency signals received from the subject during sleep relative to output radiofrequency signals transmitted to the subject during sleep, calculating cardiac output based on the phase shift, and using the cardiac output for identifying sleep apnea events.02-11-2010
20100018531Methods And Apparatus For Varying The Back-Up Rate For A Ventilator - A ventilator device delivers ventilatory support to a patient in a back up timed mode when patient respiration is not detected or a spontaneous mode when patient respiration is detected. The timing threshold governing the back-up mode is chosen to deviate from normal expected respiration time for the patient to promote patient initiated ventilation in the spontaneous mode but permit back-up ventilation in the event of apnea. Automated adjustments to the timing threshold during the timed mode are made from the less vigilant timing threshold to a more vigilant threshold at or near a timing of normal expected breathing of the patient. Such adjustments may be made from a minimum to a maximum vigilance timing settings or incrementally there between as a function of time in the timed mode which is preferably the number of delivered machine breaths.01-28-2010
20100269827System and Method for Circuits to Allow CPAP to Provide Zero Pressure - A system comprises a respiratory delivery arrangement adapted to cover at least one respiratory orifice of a patient. The system also comprises a first conduit having a first end and a second end, the second end connected to the respiratory delivery arrangement. A positive pressure is provided to the respiratory orifice via the first conduit and a second conduit having a third end and a fourth end, the fourth end connected to the respiratory delivery arrangement. An exhaled gas is extracted from the respiratory orifice by one or both of a valve configured to redirect flow through the respiratory delivery arrangement and a venturi opening.10-28-2010
20120255552METHOD AND APPARATUS FOR TREATING CHEYNE-STOKES RESPIRATION - A system and method for delivering a flow of breathing gas to an airway of a patient. The system monitors a characteristic that varies based on variations of the flow of the breathing gas and determines a Target Flow for the gas to be delivered to the patient based on the monitored characteristic. The Target Flow is set to a level sufficient to treat Cheyne-Stokes respiration or a sleep disordered breathing event. The system also alters the Target Flow based on a determination that the patient is experiencing a sleep disordered breathing event. The system further determines a pressure relief component and controls the flow of gas delivered to the patient based on the Target Flow and the pressure relief component.10-11-2012
20120298108AUTOMATICALLY CONTROLLED VENTILATION SYSTEM - A system for controlling and regulating breathing gas supplied to a patient that includes a pressure generator system that provides breathing gas to a patient and a patent circuit that delivers the breathing gas to the patient. The system includes an interface device coupled to the patient circuit to communicate the flow of gas to the patient' airway. A sensor detects a parameter indicative of a flow of breathing gas delivered to the patient. A controller coupled to the sensor and the pressure generator system measures at least one characteristic of respiratory airflow of a patient and calculates a target breath-amplitude-based parameter and a time-based parameter of at least a portion of the patient's respiratory cycle to be delivered to the patient based on the at least one characteristic of respiratory airflow.11-29-2012
20120227739DRUG ADMINISTRATION CONTROLLER - A drug administration controller has a sensor that generates a sensor signal to a physiological measurement device, which measures a physiological parameter in response. A control output responsive to the physiological parameter or a metric derived from the physiological parameter causes a drug administration device to affect the treatment of a person, such as by initiating, pausing, halting or adjusting the dosage of drugs administered to the person.09-13-2012
20120227740ADMINISTRATION OF CPAP TREATMENT PRESSURE IN PRESENCE OF APNEA - CPAP treatment apparatus is disclosed having a controllable flow generator (09-13-2012
20080302364System and Method for Treating Ventilatory Instability - A therapy system adapted to treat a patient's ventilatory instability using a ventilatory therapy, a gas modulation therapy, or both. The algorithm implemented by the therapy system monitors the ventilatory instability, such as Cheyne Stokes Respiration (CSR), mixed apneas, CPAP emergent apneas, and complex sleep disordered breathing (CSDB) and treats the ventilatory instability. The algorithm also determine a reference point with respect to the ventilatory instability. The therapy delivery system initiate the treatment based on the reference point.12-11-2008
20100326443METHOD AND DEVICE FOR GAS SUPPLY DURING CARDIOPULMONARY RESUSCITATION - A method and device for providing ventillation gas to a patient during cardiopulmonary resuscitation, mechanically or manually. The includes comprises: a gas source, a tracheal tube arranged in the trachea of a patient, a gas channel in the tracheal tube, for supplying gas, such as oxygen, to the bronchi of the patient, a central channel for connecting the bronchi to the atmosphere, a flow valve for adjusting the flow rate of the gas supplied, and a switch valve for initiating and terminating the gas supply. The device is operated by a computer to cycle the patient through a series of operational phases.12-30-2010
20110120471Reperfusion Protection in Resuscitation - An apparatus and method for resuscitating a patient suffering from cardiac arrest or another condition in which normal circulation has been interrupted. A ventilator is used for delivering a gas mixture to the patient. The ventilator is configured to adjust the partial pressure of CO2 to one or more partial pressures high enough to slow expiration of CO2 from the patient's lungs and thereby maintain a reduced pH in the patient's tissues for a period of time following return of spontaneous circulation.05-26-2011
20110120470TREATMENT PROTOCOL TEMPLATE GENERATION AND BRANCHING LOGIC SYSTEM - A method for determining a next protocol step in a patient treatment protocol upon completion of a current treatment protocol step. The method includes accessing a treatment protocol template associated with a treatment protocol step. The treatment protocol step includes rules that determine when the protocol step is passed or failed and includes a first clinical decision point that specifies a second protocol step that is be performed next when the rules are passed and a second clinical decision point that specifies a third protocol step that is to be performed next when the rules are not passed. The method includes receiving input into parameter fields of the treatment protocol template, determining if the rules associated with the parameter fields of the treatment protocol template have been passed or not passed, and automatically determining which of the second or third protocol steps is to be performed next.05-26-2011
20110120469MEDICAL VENTILATION DEVICE WITH HOSE DETECTION - A medical ventilator is coupled to a patient via a hose system to generate a respiratory flow according to a predetermined ventilation mode. The ventilator has a first flow sensor for generating a first sensor signal indicative of an inspiratory flow into the hose system distant from the patient. The hose system has a further flow sensor for generating a further sensor signal indicative of the respiratory flow proximal to the patient. The ventilator has an input for receiving the further sensor signal. The ventilator compares the further sensor signal with an expected sensor signal indicative of the respiratory flow proximal to the patient. The expected sensor signal is determined by a combination of the first sensor signal and the predetermined ventilation mode. The ventilator controls the ventilating in dependence on the comparison.05-26-2011
20120266882APPARATUS FOR RESPIRATORY SUPPORT AND NON-INVASIVE DETECTION OF ALVEOLAR DERECRUITMENT FOR PATIENTS SUFFERING FROM RESPIRATORY FAILURE - Apparatus for respiratory support and non-invasive detection of alveolar recruitment/derecruitment provides air supply to a patient at a base pressure and an additional pressure which can be varied at a frequency of from 5 to 10 Hz and transducers applied to the conduits supplying air to the patient to send electric signals to a computer to obtain a variable positive end-expiratory pressure and a to obtain an end expiratory resistance at varying values of positive end expiratory pressure and defining the state of pulmonary recruitment as the value of the positive end-expiratory pressure which corresponds to a point of maximum expiratory resistance.10-25-2012
20110226248AUTOMATIC RISE TIME ADJUSTMENT - A method of providing pressure support to a patient that includes determining a measure associated with an inspiratory time of the patient during therapy, delivering a flow of breathing gas to the patient at an inspiratory positive airway pressure (IPAP) level during at least a portion of an inspiratory phase of the patient, delivering the flow of breathing gas to the patient at an expiratory positive airway pressure (EPAP) level that is less than the IPAP level during at least a portion of an expiratory phase of the patient, and automatically setting a rise time associated with a transition from the EPAP level to the IPAP level based on the measure associated with the inspiratory time of the patient. Also provided is a pressure support system adapted to perform the method.09-22-2011
20120318267Providing Automated or Manual Guidance on Dynamic Patient Positioning Based on Measured Variables for Ventilation Control - Methods and systems that incorporate automated or manual control of ventilation and kinetic rotation therapy are provided. In one exemplary embodiment, an artificial ventilator is used to artificially ventilate one of the patient's lungs, the status of the artificially ventilated lung is determined by measuring one or more ventilation status measures, and one or more of the ventilation status measures is used to provide feedback for controlling the positioning of the patient. In some exemplary embodiments, the feedback is used for automated control of the positioning of the patient, while in other exemplary embodiments, the feedback is used as guidance for manual control of the positioning of the patient.12-20-2012
20110265794VENTILATORY ASSISTANCE FOR TREATMENT OF CARDIAC FAILURE AND CHEYNE-STOKES BREATHING - Method and apparatus for the treatment of cardiac failure, Cheyne Stokes breathing or central sleep apnea are disclosed. A subject is provided with ventilatory support, for example positive pressure ventilatory support using a blower and mask. Respiratory airflow is determined. From the respiratory airflow are derived a measure of instantaneous ventilation (for example half the absolute value of the respiratory airflow) and a measure of longterm average ventilation (for example the instantaneous ventilation low pass filtered with a 100 second time constant). A target ventilation is taken as 95% of the longterm average ventilation. The instantaneous ventilation is fed as the input signal to a clipped integral controller, with the target ventilation as the reference signal. The output of the controller determines the degree of ventilatory support. Clipping is typically to between half and double the degree of support that would do all the respiratory work. A third measure of ventilation, for example instantaneous ventilation low pass filtered with a time constant of 5 seconds, is calculated. Ventilatory support is in phase with the subject's respiratory airflow to the fuzzy extent that this ventilation is above target, and at a preset rate conversely.11-03-2011
20120318266AIR DELIVERY SYSTEM - An air delivery system is provided. The air delivery system includes a PAP device having a flow generator, a patient interface, a processor and a connector, and at least a removable sensing device having at least a sensor, a front-end analog circuit and a connector. The sensor is integrated with the patient interface to measure a respiratory characteristic in a path between the patient's upper airway and the flow generator. When the removable sensing device is separated from the PAP device, the PAP device enters a first operation mode to perform a first preset air delivery behavior, and when the removable sensing device is coupled to the PAP device through the connectors respectively thereof, the PAP device enters a second operation mode to perform a second air delivery behavior for adjusting the treatment pressure in accordance with the respiratory characteristic.12-20-2012
20120318268VENTILATION METHOD AND VENTILATION DEVICE - The present invention relates to a method for the ventilation of a living being (12-20-2012
20120090611Systems And Methods For Controlling An Amount Of Oxygen In Blood Of A Ventilator Patient - This disclosure describes systems and methods for controlling blood oxygen saturation (SpO04-19-2012
20120285456Automated Inspiratory Muscle Training for Patients Receiving Mechanical Ventilation - A system and method for automated inspiratory muscle strength exercise includes software for setting a mechanical ventilator for a pressure regulated breath with an initial pressure target that is at the highest pressure setting a patient can tolerate and increasing the pressure target as tolerated.11-15-2012
20120325212Method And Apparatus For Providing Positive Airway Pressure To A Patient - Methods and apparatus for treatment of medical disorders such as obstructive sleep apnea and congestive heart failure are disclosed. A method involves delivering pressurized air, oxygen or other breathing gas to a patient during a respiratory cycle, where pressure of the air is decreased according to an expiratory unloading factor during expiration. The timing and magnitude of the pressure change may be fully automated and responsive to feedback from a motor load sensor, optionally in combination with a pressure sensor.12-27-2012
20120325211VENTILATION MASK WITH INTEGRATED PILOTED EXHALATION VALVE AND METHOD OF VENTILATING A PATIENT USING THE SAME - In accordance with the present invention, there is provided a mask for achieving positive pressure mechanical ventilation (inclusive of CPAP, ventilator support, critical care ventilation, emergency applications), and a method for a operating a ventilation system including such mask. The mask of the present invention includes a piloted exhalation valve that is used to achieve the target pressures/flows to the patient. The pilot for the valve may be pneumatic and driven from the gas supply tubing from the ventilator. The pilot may also be a preset pressure derived in the mask, a separate pneumatic line from the ventilator, or an electro-mechanical control. Additionally, the valve can be implemented with a diaphragm or with a flapper.12-27-2012
20100170513Self-contained, intermittent positive airway pressure systems and methods for treating sleep apnea, snoring, and other respiratory disorders - Systems and methods provide a self-contained, intermittent positive airway pressure system for treating sleep apnea, snoring, and other respiratory disorders. The systems and methods provide an air flow director that can be worn in or over the nose of the individual in communication with an upper airway. The systems and methods provide an airflow regulation assembly that can also be worn in its entirety by the individual in communication with the air flow director. The airflow regulation assembly includes a source of positive pressure. The airflow regulation assembly intermittently operates the source of positive pressure to increase positive air pressure in the air flow director sufficient to resist tissue collapse in the upper airway during only a portion of the respiratory cycle less than the entire respiratory cycle.07-08-2010
20120240934SYSTEM FOR CONTROLLING APENA - An implanted stimulation device or air control device are activated by an external radar-like sensor for controlling apnea. The radar-like sensor senses the closure of the air flow cavity, and associated control circuitry signals (1) a stimulator to cause muscles to open the air passage way that is closing or closed or (2) an air control device to open the air passage way that is closing or closed.09-27-2012
20080236584Gas Conserving Device - An electronic oxygen conserving device for controlling a flow of oxygen from an oxygen storage container to a user. When a conserve setting is selected, a flow of oxygen travels through an oxygen regulating valve that has an open state and a closed state. A temporary electrical charge or current is provided to the oxygen regulating valve during the initial inhalation of oxygen by an individual, opening the regulating valve opens to delivery oxygen to the user. The oxygen regulating valve remains open even after termination of the electric current. After a predetermined timed delivery dose or upon exhalation by the individual, a subsequent temporary electric charge or current is provided to oxygen regulating valve, closing the regulating valve closes to prevent delivery of oxygen to the user, thus conserving oxygen. The oxygen regulating valve remains closed even after termination of the subsequent electric current.10-02-2008
20130174846SYSTEM AND METHOD FOR DETERMINATION OF TRANSPULMONARY PRESSURE IN A PATIENT CONNECTED TO A BREATHING APPARATUS - A breathing apparatus (07-11-2013
20130174847DISTINGUISHING BETWEEN CLOSED AND OPEN AIRWAY APNEAS AND TREATING PATIENTS ACCORDINGLY - A method of controlling treatment of respiratory conditions of a patient includes determining a signal representative of patient respiratory flow. The signal is analysed to determine (i) the presence of an apnea and a hypopnea and (ii) if present, a type of the apnea or hypopnea. A motor driven blower is controlled to increase a treatment pressure of an airflow delivered toward the airway of the patient upon determination of the presence of an apnea or a hypopnea depending on the type of the apnea or hypopnea, and otherwise to decrease the treatment pressure.07-11-2013
20110259333Ventilation System With System Status Display For Maintenance And Service Information - The disclosure describes a novel approach for displaying information on a ventilator system. The disclosure describes a novel respiratory system including a removable primary display and system status display. Further, the disclosure describes a novel method for displaying ventilator information and a novel method for controlling a ventilator system.10-27-2011
20080216835STANDALONE CPAP DEVICE AND METHOD OF USING - A continuous positive airway pressure (CPAP) device is provided. The CPAP device includes the feature that the blower is mounted directly to the mouthpiece or the nose mask, thus eliminating the need for an air tube to convey the pressurized air from the blower to the user's mouth or nose. The CPAP device may operate in continuous mode, bi-phase mode, or automatic mode. The CPAP device may include a capability to regulate pressure, temperature, and/or relative humidity of the pressurized air. The CPAP device may collect and store user respiration data, possibly including recordation of snoring noises.09-11-2008
20080216834Method and Apparatus for Delivering a Dose of a Gaseous Drug to a Patient - A method and device that can vary the dose of a gaseous drug provided to a patient based on a comparison of the normal resting breath rate for each individual patient and the current breath rate of the patient so that the patient does not become desaturated.09-11-2008
20090050154METHOD AND APPARATUS FOR ADJUSTING DESIRED PRESSURE IN POSITIVE AIRWAY PRESSURE DEVICES - Systems and methods for adjusting a desired pressure in a positive airway pressure (PAP) device are provided. In one embodiment, the method includes: a) providing breathing gas under positive pressure to a patient via a PAP device based on current desired pressure, b) monitoring a characteristic of the breathing gas, patient, or PAP device indicative of respiration, c) creating a breathing cycle signal having a first level associated with inhalation and a second level associated with exhalation, the signal being based on the monitored respiration characteristic, d) performing an abnormal breathing check based on the monitored respiration characteristic and the breathing cycle signal, and e) if abnormal breathing is detected, increasing the current desired pressure until a maximum desired pressure is reached, otherwise, decreasing the current desired pressure until a minimum desired pressure is reached. Several embodiments of an apparatus associated with the method are also provided.02-26-2009
20130118496LEAK ESTIMATION USING FUNCTION ESTIMATION - The disclosed concept maintains that Q05-16-2013
20130118495BREATHING ASSISTANCE APPARATUS - A breathing assistance apparatus operates in alternating inhalation and expiratory phases wherein a) the control means of the apparatus comprise selection means capable of selecting a pressure parameter or a flow rate parameter to define; b) the reference value for the gas source, the selection means are controlled by an automatic control unit being: I) connected to pressure and flow rate sensors situated on the inhalation duct to form a direct closed regulation loop for selecting a reference value parameter, II) associated to a program allowing the selection to be made in real time from a pressure or flow rate signal, so that the association of a direct closed regulation circuit for the selection of a reference value parameter with a valve permitting proportional operation, allows real time control of barometric and volumetric operating modes, between and during the inhalation and expiratory phases. The invention also concerns associated operating processes.05-16-2013
20130133655SYSTEM AND METHOD FOR SUPPORTING SUB-PHYSIOLOGIC AND PHYSIOLOGIC TIDAL VOLUMES IN SPONTANEOUS OR NON-SPONTANEOUS BREATHING DURING HIGH FREQUENCY VENTILATION - A method of providing high frequency ventilation to a patient, comprises delivering a flow of breathing gas to the patient, the flow of breathing gas having a first positive pressure level and a second positive pressure level, the first and second positive pressure levels alternating with one another in a plurality of cycles in the flow of breathing gas to have a frequency and an amplitude, the flow of breathing gas to the patient generating a mean airway pressure; determining whether the patient is breathing spontaneously or is trying to breath spontaneously; and, in response to the determination that the patient is breathing spontaneously or trying to breath spontaneously or according to the user settings for HFV and user intervention for non-spontaneous breathing patient, adjusting the mean airway pressure, modulating the frequency and duty cycle of the flow of breathing gas, or modulating the level of flow and pressure amplitude of the breathing gas, or two or more thereof.05-30-2013
20090260630Sleep inducing apparatus for CPAP machine - A continuous positive airway pressure (“CPAP”) machine has an electrically driven air pump, an air hose coupled to the air pump, and a air mask coupled to the air hose and adapted to be applied to a head of a patient to supply a stream of air to breathing passages of said patient while the patient is sleeping. A device, attached to said machine, is provided for inducing sleep in said patient.10-22-2009
20080202527PROVIDING AUTOMATED OR MANUAL GUIDANCE ON DYNAMIC PATIENT POSITIONING BASED ON MEASURED VARIABLES FOR VENTILATION CONTROL - Methods and systems that incorporate automated or manual control of ventilation and kinetic rotation therapy are provided. In one exemplary embodiment, an artificial ventilator is used to artificially ventilate one of the patient's lungs, the status of the artificially ventilated lung is determined by measuring one or more ventilation status measures, and one or more of the ventilation status measures is used to provide feedback for controlling the positioning of the patient. In some exemplary embodiments, the feedback is used for automated control of the positioning of the patient, while in other exemplary embodiments, the feedback is used as guidance for manual control of the positioning of the patient.08-28-2008
20110209704Event-Based Delay Detection And Control Of Networked Systems In Medical Ventilation - This disclosure describes systems and methods for detecting and quantifying transmission delays associated with distributed sensing and monitoring functions within a ventilatory system. Specifically, the present methods and systems described herein define an event-based delay detection algorithm for determining transmission delays between distributed signal measurement and processing subsystems and a central platform that receives data from these subsystems. It is important to evaluate and quantify transmission delays because dyssynchrony in data communication may result in the misalignment of visualization and monitoring systems or instability in closed-loop control systems. Generally, embodiments described herein seek to quantify transmission delays by selecting a ventilator-based defining event as a temporal baseline and calculating the delay between the inception of the defining event and the receipt of data regarding the defining event from one or more distributed sensing devices.09-01-2011
20130146055METHODS AND SYSTEMS FOR ADAPTIVE BASE FLOW - This disclosure describes systems and methods for providing novel adaptive base flow scheduling during ventilation of a patient to optimize the accuracy of estimated exhaled tidal volume. Further, this disclosure describes systems and methods for providing novel adaptive inspiratory trigger threshold scheduling during the novel adaptive base flow scheduling.06-13-2013
20130146056METHOD AND SYSTEM FOR CLASSIFICATION OF PHOTO-PLETHYSMOGRAPHICALLY DETECTED RESPIRATORY EFFORT - Embodiments disclosed herein may include systems and methods for determining a patient's respiratory effort and blood oxygen saturation based on data acquired from a pulse oximetry sensor and analyzing the parameters in conjunction with each other. For example, the respiratory effort may be determined based on a photo-plethysmographic waveform generated from light attenuation detected by the sensor, and the blood oxygen saturation may be a pulse-based estimate of arterial blood oxygen saturation determined from the detected attenuation. Analysis of the parameters may enable detection and classification of apnea (e.g., obstructive or central) or another underlying cause for respiratory instability. Furthermore, the measured respiratory effort may be compared to respiratory effort supplied by a ventilator to ensure proper sensor placement before enabling automatic adjustment of ventilator settings.06-13-2013
20130146057System and Method for Circuits to Allow CPAP to Provide Zero Pressure - A system comprises a respiratory delivery arrangement adapted to cover at least one respiratory orifice of a patient. The system also comprises a first conduit having a first end and a second end, the second end connected to the respiratory delivery arrangement. A positive pressure is provided to the respiratory orifice via the first conduit and a second conduit having a third end and a fourth end, the fourth end connected to the respiratory delivery arrangement. An exhaled gas is extracted from the respiratory orifice by one or both of a valve configured to redirect flow through the respiratory delivery arrangement and a venturi opening.06-13-2013
20080196724Gas Supply Device for Sleep Apnea - An apparatus is provided for controlling air supplied under pressure to a patient suffering from sleep disorders such as apnoea. The apparatus measures and/or calculates the inspiratory air flow, volume and pressure to the airway. Controlled pressurized air is supplied to the patient's upper anatomical airway, wherein the apparatus measures the air flow and pressure to the airway. The apparatus determines whether to increase or decrease the pressure to the patient's airway based on a determination of one or more factors, such as the occurrence of hypopnoea, hyperventilation, obstructive or central apnoea, air leakage and acoustical vibrations. Occurrences of events representing a sleep problem may be stored by the apparatus and retrieved by a clinician at a later date.08-21-2008
20100307500METHODS AND DEVICES FOR THE DETECTION OF HYPOPNOEA - Automated methods provide hypopnea detection for determining a hypopnea event and/or a severity of a hypopnea event. In some embodiments, a calculated short-term variance of a measured respiratory flow signal are compared to first and second proportions of a calculated long-term variance of the measured flow signal. A detection of the hypopnea may be indicated if the first measure falls below and does not exceed a range of the first and second proportions during a first time period. In some embodiments, a hypopnea severity measure is determined by automated measuring of an area bounded by first and second crossings of a short-term measure of ventilation and a proportion of a long-term measure. The detection methodologies may be implemented for data analysis by a specific purpose computer, a detection device that measures a respiratory airflow or a respiratory treatment apparatus that provides a respiratory treatment regime based on the detected hypopneas.12-09-2010
20100307499RESPIRATOR WITH AUTOMATICALLY CONTROLLED PRESSURE-ASSIST RESPIRATION - A respirator with an adjustable pressure or volume flow curve has a control and analyzing unit, which is set up to determine the resistance R and the alveolar pressure P12-09-2010
20120272964MOBILE RESPIRATOR - A respiration device with a respirator (11-01-2012
20120272962METHODS AND SYSTEMS FOR MANAGING A VENTILATOR PATIENT WITH A CAPNOMETER - This disclosure describes systems and methods for managing the ventilation of a patient being ventilated by a medical ventilator. The disclosure describes a novel approach of displaying integrated ventilator information with capnometer data. The disclosure further describes a novel approach for determining if the ventilator breathing circuit is occluded or disconnected.11-01-2012
20120272963INTERFACE APPLIANCE CARRYING ONE OR MORE SENSORS DETECTING PARAMETERS RELATED TO A FLOW OF FLUID DELIVERED THROUGH THE APPLIANCE - An interface appliance is configured to deliver a flow of fluid to the airway of a subject. The generation of the flow of fluid may be controlled to provide a therapeutic benefit to the subject. The interface appliance is configured to carry one or more sensors (11-01-2012
20120272961METHODS AND SYSTEMS FOR EXHALATION CONTROL AND TRAJECTORY OPTIMIZATION - This disclosure describes systems and methods for controlling pressure and/or flow during exhalation. The disclosure describes novel exhalation modes for ventilating a patient.11-01-2012
20120272960Methods and Systems for Volume-Targeted Minimum Pressure-Control Ventilation - This disclosure describes systems and methods for providing a volume-targeted minimum pressure-control breath type during ventilation of a patient. The disclosure describes a novel breath type that allows an operator to input a tidal volume and receive some of the benefits of utilizing an airway pressure release ventilation (APRV) breath type in combination with some of the benefits of utilizing a volume-targeted-pressure-control (VC+) breath type.11-01-2012
20100313888SPOOL VALVE ASSEMBLY FOR DELIVERY OF A GASEOUS DRUG - A spool valve assembly for a gaseous drug delivery device includes a housing, a gas inlet, a continuous flow orifice, a valve outlet, a valve mounting surface, a spool valve, a patient outlet, an exhaust chamber with a pressure sensor detecting inhalation and a gaseous drug path to the patient, and a control circuit connected to the pressure sensor. The gas inlet includes a port connected to a gaseous drug supply, with a first portion inside the housing and a second portion outside the housing. The valve mounting surface includes a mount for a high flow valve and a low flow valve, with the valve mounting surface between the gas inlet and the valve outlet. The spool valve includes a knob, an outer surface, sealing members and a counter bore, with a first portion of the knob inside the housing and a second portion outside the housing.12-16-2010
20110232642VARIABLE FLOW OXYGEN THERAPY - The present invention describes systems and methods to provide variable flow oxygen therapy. An exemplary embodiment of the present invention provides a method of oxygen therapy involving delivering oxygen-enriched gas to a patient during a first portion of a breathing cycle at a first flow rate. Furthermore, the method of oxygen therapy involves delivering oxygen-enriched gas to the patient during a second portion of the breathing cycle at a second flow rate, where the second flow rate is greater than zero and less than the first flow rate.09-29-2011
20130152934ADAPTIVE CYCLING FOR RESPIRATORY TREATMENT APPARATUS - A controller or processor (s) implements detection of respiratory related conditions that may serve as control logic to synchronize pressure treatment delivery with a patient's respiratory cycle. Based on data derived from sensor signals associated with the respiratory treatment, a monitoring device, detector or respiratory treatment apparatus may evaluate flow measures from a flow sensor and distinguish flow attributable to the respiratory treatment apparatus and flow attributable to patient respiratory muscles. The determination may serve as a basis of synchronization criteria that controls pressure levels from a pressure treatment apparatus, such as by evaluating the determined patient generated flow or a relationship between total flow and apparatus flow. In some embodiments, data for the cycling conditions is determined in preliminary treatment cycles during which synchronized pressure changes are controlled according to other cycling criteria. The new cycling conditions are then automatically initiated for control of synchronization in subsequent cycles.06-20-2013
20130152932Respiratory Treatment Delivery System - Embodiments relate to systems and methods for delivery of oxygen or other treatment gases to a patient without requiring physical contact or enclosure of the patient. Embodiments can include a delivery hood, sensing components, and a gas distribution system including one or more gas delivery ports. Gas delivery ports may be individually controlled based on input from the sensing components to alter the volume and orientation of treatment gas flow directed at a patient. Sensing components can include cameras or other sensors that detect the position of a patient's head, and gas delivery ports may then be controlled to direct treatment gas flow in the direction of the patient's head. Embodiments and methods described thereby allow for efficient oxygen or other gas delivery to a patient without requiring contact or enclosure of the patient.06-20-2013
20130152933AUTOMATED FLUID DELIVERY SYSTEM AND METHOD - An automated fluid delivery system and method are disclosed. The system includes distensible tubing, a flow controller, and a fluid flow adjustment module. The fluid flow adjustment module may be configured to detect differential pressure in the tubing and adjust the flow controller to provide an amount of fluid through the tubing during inhalation.06-20-2013
20130180526WEANING FROM VENTILATION USING CAPNOGRAPHY - There is provided herein a method for monitoring weaning of a subject from a respiratory ventilator, the method comprising characterizing distinct patterns in a series of CO2 waveforms obtained from expired breath of a subject undergoing respiratory ventilation weaning, wherein said distinct patterns are indicative to the effectiveness of a weaning process and wherein said distinct patterns are selected from a group consisting of “sigh events”, “spike events” and “pools”; and providing an indication relating to the effectiveness of the weaning process.07-18-2013
20080196723Breath responsive powered air-purifying respirator - A system for regulating the airflow to a closed environment using feedback control for the position of a control valve and blower speed. The system provides a control apparatus that regulates airflow to a closed environment, such as the mask of a breathing apparatus, to ensure sufficient breathing air for a wearer of such mask. In order to provide fast response to a change in condition in the breathable environment, the airflow regulator includes a valve control and a blower control.08-21-2008
20130125892SERVO VENTILATION USING PRESSURE DROP FROM BASELINE - A system and method for delivering a flow of breathing gas to an airway of a patient that includes a gas flow generator and a patient circuit that communicates the flow of gas to an airway of a patient. A sensor measures a characteristic associated with the flow of gas, such as flow rate. A controller determines a first characteristic based on the measured characteristic and a target of the flow of gas to be delivered to the patient. The controller controls the delivery of gas to the patient by 1) providing a baseline positive pressure support amount to the patient and 2) providing a modified pressure support amount by reducing the baseline amount by a given amount if the first characteristic is above the target. The baseline pressure includes a pressure provided during inspiration that is higher than a pressure provided during expiration.05-23-2013
20110303223PRESSURE SUPPORT SYSTEM WITH MACHINE DELIVERED BREATHS - A method of operating a ventilator or pressure support system that automatically determines a timed back up rate for the patient based on the patient's spontaneous breathing patterns. The aggressiveness of the determined rate increases as the patient takes less spontaneous breaths. Also, a method wherein one or more mechanisms are used to determine whether a machine breath should be issued. Each mechanism consists of a basic timing element coupled with one or more logical permits. Both the timing element and each of the one or more logical permits must be satisfied to allow the timing mechanism to trigger a machine breath.12-15-2011
20130186401LEAK-COMPENSATED PRESSURE REGULATED VOLUME CONTROL VENTILATION - This disclosure describes systems and methods for compensating for leakage when during delivery of gas to a patient from a medical ventilator in a pressure regulated volume control (PRVC) ventilation mode. The technology described herein includes systems and methods that compensate the delivery of PRVC ventilation for leakage in the patient circuit by using leak-compensated lung flows as well as respiratory mechanics (lung compliance and lung resistance) estimated in a manner that compensates for elastic and inelastic leaks from the ventilation system.07-25-2013
20120000466System and Method for Improved Treatment of Sleeping Disorders using Therapeutic Positive Airway Pressure - Described is a method and system providing therapeutic positive airway pressure to a particular area of patient's airways. The system may include a flow generator and a processing arrangement. The flow generator supplies an airflow to an airway of the patient. The processing arrangement is connected to the flow generator to control a supply pressure at which the airflow is generated by the flow generator. The processing arrangement continuously adjusts the supply pressure to maintain a pressure in a predetermined portion of the patient's airway substantially constant. The predetermined portion of the patient's airway includes a collapsible portion of an upper airway of the patient. The processing arrangement also controls the supply pressure to maintain the pressure in the collapsible portion of the patient's airway at a value at least as great as a tissue pressure below which the collapsible portion collapses.01-05-2012
20130192600BREATHING SYSTEM WITH FLOW ESTIMATION - A breathing system for ventilating a patient has a gas channel enclosing a gas channel volume (V), and a compliance (C). The system has a flow calculation unit operative to determine a gas flow estimate (Fe) at a flow estimate location in the gas channel. The gas flow estimate (Fe) is based on a relationship between a monitored gas flow (Fm) in the gas channel and a compressible gas flow (Fc) which depends on the compliance (C) in the gas channel. The monitored gas flow (Fm) is a gas flow at a monitoring location in the gas channel and the compressible gas flow (Fc) is a flow of gas in the gas channel between the flow estimate location and the monitoring location, and the flow estimate location is remote from the monitoring location.08-01-2013
20130192599USING ESTIMATED CARINAL PRESSURE FOR FEEDBACK CONTROL OF CARINAL PRESSURE DURING VENTILATION - This disclosure describes systems and methods for configuring a ventilator to estimate the carinal pressure to minimize the work of breathing due to a breathing tube. A patient's carina is a cartilaginous ridge located at the site of the tracheal bifurcation between the two primary bronchi. According to embodiments, an estimated carinal pressure may be determined and used as feedback control for the carinal pressure. An estimated carinal pressure refers to a pressure estimated to exist at the patient carina. According to embodiments, the estimated carinal pressure may be compared to the carinal pressure command to determine an error. The carinal pressure command may be positive end expiratory pressure (PEEP) or some other suitable target pressure. The error between the estimated carinal pressure and the carinal pressure command may then be used as feedback control to achieve the carinal pressure command and thereby to minimize the work of breathing due to the breathing tube.08-01-2013
20120024287SYSTEM AND METHOD FOR PROVIDING FEEDBACK TO A SUBJECT REGARDING RECEPTION OF POSITIVE AIRWAY SUPPORT THERAPY - A system and method provide feedback to a subject regarding compliance to a positive airway pressure support therapy regime. The feedback is provided to the subject in real-time (or near real-time). The feedback indicates to the subject whether a usage goal has been achieved. The usage goal may be dynamically and adaptively determined based on past usage by the subject. This may facilitate the automatic generation of usage goals for the subject that are realistic and gradually increase the compliance of the subject over time.02-02-2012
20130199532SYSTEM AND METHOD OF DETECTING AND RESPONDING TO SPONTANEOUS RESPIRATION SUBSEQUENT TO A RESIRATORY EVENT - A pressurized flow of breathable gas is delivered to the airway of a subject in accordance with a therapy regime. Responsive to the subject resuming respiration after a respiratory event, delivery of the pressurized flow of breathable gas is resumed at an inhalation in the therapy regime. As such, the therapy regime is effectively re-synchronized with the respiration of the subject subsequent to a respiratory event.08-08-2013
20130199533VENTILATION MANAGEMENT SYSTEM - Ventilator management systems are provided. In one aspect, a ventilator management system includes a memory that includes an initial configuration profile configured to designate operating parameters for a ventilation device, and a processor. The processor is configured to receive ventilator data from the ventilation device, the ventilator data includes at least one of operating parameters of the ventilation device or physiological statistics of a patient associated with the ventilation device, and determine, based on the ventilator data, a modification to the initial configuration profile for the ventilation device. The processor is also configured to generate a modified configuration profile for the ventilation device based on the determined modification. Methods and machine-readable media are also provided.08-08-2013
20130199534VENTILATION SYSTEM - Ventilation systems are provided. In one aspect, a ventilation system includes system includes a ventilation device that is configured to provide breathable air or gas mixture to a patient according to certain operating parameters, a memory that includes instructions, and a processor. The processor is configured to execute the instructions to receive, over a network, at least one of patient data, order data, configuration data, user data, or rules or protocols, and provide a modification of operating parameters of the ventilation device based on the received patient data, order data, configuration data, user data, or rules or protocols. Methods and machine-readable media are also provided.08-08-2013

Patent applications in class Means for sensing condition of user's body