Inventors list

Assignees list

Classification tree browser

Top 100 Inventors

Top 100 Assignees


Detecting respiratory condition

Subclass of:

600 - Surgery

600300000 - DIAGNOSTIC TESTING

600481000 - Cardiovascular

600483000 - Simultaneously detecting cardiovascular condition and diverse body condition

Patent class list (only not empty are listed)

Deeper subclasses:

Entries
DocumentTitleDate
20110201946REDUCING DATA ACQUISITION, POWER AND PROCESSING FOR HEMODYNAMIC SIGNAL SAMPLING - Methods, systems and devices are provided for reducing the amount of data, processing and/or power required to analyze hemodynamic signals such as photoplethysmography (PPG) signals, pressure signals, and impedance signals. In response to detecting a specific event associated with a cyclical body function, a hemodynamic signal is continuously sampled during a window following the detecting of the specific event, wherein the window is shorter than a cycle associated with the cyclical body function. The hemodynamic signal is then analyzed based on the plurality of samples. This description is not intended to be a complete description of, or limit the scope of, the invention. Other features, aspects, and objects of the invention can be obtained from a review of the specification, the figures, and the claims.08-18-2011
20130046189METHOD AND IMPLANTABLE MEDICAL SYSTEM FOR MONITORING RESPIRATORY PARAMETERS AND A CORRESPONDING COMPUTER PROGRAM AND A CORRESPONDING COMPUTER-READABLE STORAGE MEDIUM - A method and an implantable medical system for monitoring respiratory parameters, and a corresponding computer program and a corresponding computer-readable storage medium which can be used in particular for monitoring, especially for remote monitoring of the health condition of a patient with cardiac insufficiency that provides an improved method for determining the functional capacity of the cardiovascular system with consideration for stress.02-21-2013
20100069762System And Method For Assessing Sleep Quality - An assessment of sleep quality and sleep disordered breathing is determined from cardiopulmonary coupling between two physiological data series. An R-R interval series is derived from an electrocardiogram (ECG) signal. The normal beats from the R-R interval series are extracted to produce a normal-to-normal interval series. The amplitude variations in the QRS complex are used to extract a surrogate respiration signal (i.e., ECG-derived respiration) associated with the NN interval series. The two series are corrected to remove outliers, and resampled. The cross-spectral power and coherence of the two resampled signals are calculated over a plurality of coherence windows. For each coherence window, the product of the coherence and cross-spectral power is used to calculate coherent cross-power. Using the appropriate thresholds for the coherent cross-power, the proportion of sleep spent in CAP, non-CAP, and wake and/or REM are determined. Coherent cross-power can be applied to differentiate obstructive from non-obstructive disease, and admixtures of the same.03-18-2010
20080275349MONITORING, PREDICTING AND TREATING CLINICAL EPISODES - Apparatus (11-06-2008
20110196243NON-CONTACT DETECTION OF PHYSIOLOGICAL DATA USING STOCHASTIC RESONANCE - Obtaining physiological data from a living being using non-contact sensors is disclosed. The non-contact sensors are disposed within, for example, a vehicle seat or bed. Signals detected by the non-contacting sensors, which include both physiological signals and ambient noise, are transmitted to a processing device which is positioned nearby; such as in the vehicle seat or bed. The processing device employs a stochastic resonance function whereby a signal-to-noise ratio of the physiological signals is improved. A wavelet multi-scale decomposition function and an adaptive threshold function are then used to identify the physiological signals and distinguish them from the ambient noise. The resulting signals are measured and then made available at an output of the processing device for transmission to and use by a human-machine interface.08-11-2011
20130085400NON-INVASIVE INTRACRANIAL PRESSURE SYSTEM - Non-invasive intracranial pressure detection and/or monitoring and use of data with respect thereto. Illustratively, with respect to a method, there can be a method to digitally produce and communicate intracranial pressure data from skull deformation electric signals, the method including: receiving, from at least one sensor, detected skull deformation electric signals at electrical equipment configured to transform and process the skull deformation signals that are received; transforming and processing, by the electrical equipment, the received skull deformation electric signals to produce digital intracranial pressure data; and outputting, by the electrical equipment, the digital intracranial pressure data via an output device operably associated with the electrical equipment to render the digital intracranial pressure data.04-04-2013
20090076397Adherent Emergency Patient Monitor - An adherent device comprises an adhesive patch to adhere to a skin of the patient. At least two electrodes are connected to the patch and capable of electrically coupling to the patient. Electrocardiogram circuitry can be coupled to at the least two electrodes to measure an electrocardiogram signal of the patient. An accelerometer can be mechanically coupled to the adhesive patch to generate an accelerometer signal in response to at least one of an activity or a position of the patient. A processor comprising a tangible medium can be configured to communicate with the electrocardiogram circuitry and the accelerometer to generate an alarm signal in response to the electrocardiogram signal and the accelerometer signal.03-19-2009
20100076325METHOD AND APPARATUS FOR DETERMINING RESPIRATORY EFFORT IN A MEDICAL DEVICE - A method of determining respiratory effort in a medical device in which pressure signals are sensed to generate corresponding sample points, an inspiration and an expiration are detected in response to the sensed pressure signals, a breath is detected in response to the detected inspiration and the detected expiration, and the respiratory effort is determined in response to the detected breath.03-25-2010
20100076324METHOD AND APPARATUS FOR DETECTING RESPIRATORY EFFORT IN A MEDICAL DEVICE - A medical device for determining a respiratory effort having a pressure sensor to sense pressure signals, a housing having system components positioned therein, and a microprocessor positioned within the housing, wherein the microprocessor detects an inspiration and an expiration in response to the pressure signals, detects a breath in response to the detected inspiration and the detected expiration, and determines the respiratory effort in response to the detected breath.03-25-2010
20100076323METHOD AND APPARATUS FOR DETERMINING A RESPIRATION PARAMETER IN A MEDICAL DEVICE - An apparatus for determining a respiration parameter in a medical device in which a pressure sensor senses pressure signals, and a signal processor, coupled to the pressure sensor, receives the sensed pressure signals and generates corresponding sample points. A microprocessor continuously adjusts a breath detection threshold in response to the generated sample points to generate a current adjusted breath detection threshold, compares a current generated sample point to the current adjusted breath detection threshold, suspends the continuous adjusting of the breath detection threshold and sets the breath detection threshold equal to the most current adjusted breath detection threshold generated prior to the suspending, and determines the respiration parameter in response to a comparing of a next generated sample point to the set breath detection threshold03-25-2010
20100076322METHOD AND APPARATUS FOR DETERMINING A RESPIRATION PARAMETER IN A MEDICAL DEVICE - A method of determining a respiration parameter in a medical device in which pressure signals are sensed to generate corresponding sample points, and a breath detection threshold is continuously adjusted in response to the generated sample points to generate a current adjusted breath detection threshold. A current generated sample point is compared to the current adjusted breath detection threshold, and the continuous adjusting of the breath detection threshold is suspended and the breath detection threshold is equal to the most current adjusted breath detection threshold generated prior to the suspending in response to the comparing. A next sample point, generated subsequent to the suspending, is compared to the set breath detection threshold, and the respiration parameter is determined in response to the comparing of a next sample point to the set breath detection threshold.03-25-2010
20120245475Bio-Impedance Sensor and Sensing Method - Implantable medical devices and techniques are implemented that use bio-impedance to measure aspects of patient physiology. A signal separation method is performed at least in part in an implantable device. The method involves detecting a plurality of impedance signals using a plurality of implantable electrodes coupled to the implantable device. The method further involves separating one or more signals from the plurality of impedance signals using a signal separation technique, such as an algorithm-based separation technique.09-27-2012
20130085401METHODS AND APPARATUSES FOR DETECTION OF MYOCARDIAL ISCHEMIA UPON EXERTION - Various method embodiments of the present invention concern sensing patient-internal pressure measurements indicative of physiological exertion, identifying one or more steady state periods of physiological exertion based on the patient-internal pressure measurements, sensing extra-cardiac response data and cardiac response data corresponding to the one or more physiological exertion steady state periods, respectively comparing the extra-cardiac response data and the cardiac response data to extra-cardiac response information and cardiac response information associated with equivalent levels of physiological exertion intensity of the one or more steady state periods, and determining the likelihood that myocardial ischemia occurred during the one or more steady state periods based on the comparison of the extra-cardiac response data to the extra-cardiac response information and the cardiac response data to the cardiac response information.04-04-2013
20130035602MOBILE REMOTE ALCOHOL MONOTORING DEVICE - A monitoring apparatus including an ethanol level sensor; an ECG sensor for generating an ECG circuit for sampling an electrical activity of a heart of a monitored person being monitored; and an air inlet component connected to an air flow sensor; wherein a first electrode is attached to the breath inlet component and wherein the ECG circuit is generated when a monitored person is in electrical contact with the first electrode and the second electrode of the ECG.02-07-2013
20130041269METHOD AND APPARATUS FOR DETERMINATION OF PHYSIOLOGICAL PARAMETERS USING CERVICAL IMPEDANCE - Implanted electrodes can be used to deliver electrical stimulation signals to areas near blood vessels, nerves, or other internal body locations. In an example, an electrode can be implanted in a cervical location and can be used to measure dimensional changes in an artery using impedance plethysmography. Measured artery dimensional changes can be used to determine one or more physiological parameters associated with a patient's health status, such as pulse transit time, relative pulse pressure, or aterial compliance, among others. These parameters can be used to monitor a patient health status or to modulate a patient's therapy, among other uses. In some examples, an electrode configured to deliver an electrostimulation signal to nerve tissue can be used to provide non-neurostimulating electrical stimulation plethysmography signals near a blood vessel.02-14-2013
20100324427SYSTEM AND KIT FOR STRESS AND RELAXATION MANAGEMENT - This invention relates to a system and a kit for stress and relaxation management. A cardiac activity sensor (12-23-2010
20090156945MONITORING RESPIRATORY VARIATION OF PULSE PRESSURE - A monitoring device may include a display, an input device to receive patient-related data, and logic. The logic may determine the pulse pressure of the patient based on the patient-related data, calculate a respiratory variation of the pulse pressure of the patient, and generate a first value based on the respiratory variation of the pulse pressure of the patient and a mean pulse pressure of the patient. The logic may also output the first value to the display. The logic may update the first value in a continuous, real-time or near real-time manner.06-18-2009
20100106027DEVICE FOR DETECTION AND ANALYSIS OF VITAL PARAMETERS OF THE BODY, SUCH AS, IN PARTICULAR, PULSE AND RESPIRATION - The present invention relates to a device for detecting and analyzing vital parameters, particularly the pulse and respiration. A metal plate (04-29-2010
20120184858BEAT ALIGNMENT AND SELECTION FOR CARDIAC MAPPING - This invention relates to the determination and/or representation of physiological information relating to a heart surface.07-19-2012
20090043212MONITORING SYSTEM FOR CARDIAC SURGICAL OPERATIONS WITH CARDIOPULMONARY BYPASS - A monitoring system for cardiac operations with cardiopulmonary bypass comprising: a processor operatively connected to a heart-lung machine; a pump flow detecting device connected to a pump of the heart-lung machine to continuously measure the pump flow value and send it to the processor; a hematocrit reading device inserted inside the arterial or venous line of the heart-lung machine to continuously measure the blood hematocrit value and to send it to the processor; a data input device to allow the operator to manually input data regarding the arterial oxygen saturation and the arterial oxygen tension; computing means integrated in the processor to compute the oxygen delivery value on the basis of the measured pump flow, the measured hematocrit value, the preset value of arterial oxygen saturation, and the preset value of arterial oxygen tension; and a display connected to the processor to display in real-time the computed oxygen delivery value.02-12-2009
20130090565METHOD AND APPARATUS FOR MONITORING EXERCISE WITH WIRELESS INTERNET CONNECTIVITY - Methods and apparatuses are provided for a wireless health monitoring system for interactively monitoring fitness or health condition of a user by connecting an internet-enabled wireless web device (“WWD”), such as a mobile phone or tablet, to a health monitoring device which may be a medical device or other device such as an exercise machine. The WWD may be wirelessly connected to the device, such as via an RF connection, including using protocols such as 802.15 or 802.11. The wireless connection may employ an adaptor, to convert proprietary RF schemes to input to a WWD. Alternatively, an adaptor may convert the output of a health monitoring device to a Bluetooth® signal for transmission to a WWD. The data is transmitted from the WWD to an Internet server using standard Internet protocols. The user may interact with the server and with other users equipped with similar apparatus.04-11-2013
20100268095SYSTEM AND METHOD FOR PREDICTING PATIENT HEALTH WITHIN A PATIENT MANAGEMENT SYSTEM - Systems and Methods for predicting patient health and patient relative well-being within a patient management system are disclosed. A preferred embodiment utilizes an implantable medical device comprising an analysis component and a sensing component further comprising a three-dimensional accelerometer, a transthoracic impedance sensor, a cardio-activity sensor, an oxygen saturation sensor and a blood glucose sensor. Some embodiments of a system disclosed herein also can be configured as an Advanced Patient Management System that helps better monitor, predict and manage chronic diseases.10-21-2010
20130060150METHOD AND APPARATUS FOR MONITORING CARDIAC AND RESPIRATORY CONDITIONS USING ACOUSTIC SOUNDS - A medical device system and associated method discriminating conditions that includes a plurality of sensors, a sensing module coupled to the plurality of sensors and configured to acquire signals from the plurality of sensors, and a processor coupled to the sensing module and configured to determine a change in a respiratory related sounds in response to a signal from a sensor of the plurality of sensors, select one or more sensors of the plurality of sensors associated with the determined change, determine a respiratory signature in response to signals from the selected one or more sensors, and determine the respiratory condition in response to the determined respiratory signature.03-07-2013
20130060151METHOD AND APPARATUS FOR MANAGEMENT OF HEART FAILURE HOSPITALIZATION - A hospitalization management system including a heart failure analyzer that receives diagnostic data including at least sensor data representative of one or more physiological signals sensed from a hospitalized patient using one or more sensors and assesses risk of rehospitalization for the patient using the diagnostic data. The outcome of the risk assessment is used during and following the patient's hospitalization for reducing the risk of rehospitalization.03-07-2013
20130060149METHOD AND APPARATUS FOR MONITORING CARDIAC AND RESPIRATORY CONDITIONS USING ACOUSTIC SOUNDS - A medical device system and associated method discriminate respiratory and cardiac conditions using respiratory sounds. A sensing module acquires a first signal and a second signal, at least the second signal acquired from an acoustic transducer. A processor is configured to receive the first signal and to control the sensing module to acquire the second acoustic signal in response to a change in the first signal. The processor discriminates between a cardiac condition and a respiratory condition as a cause of the change in the first signal in response to the second acoustic signal.03-07-2013
20100081943Detecting Sleep Events Using Localized Blood Pressure Changes - Techniques for detecting sleep events are disclosed. In some embodiments, a continuous non-invasive blood pressure (“CNIBP”) monitoring system may be used to obtain blood pressure values from a subject during a sleep study. Changes in the blood pressure over time may be determined and analyzed in order to identify a sleep event. The localized blood pressure changes may be interpreted in isolation or in combination with other signals collected from the subject.04-01-2010
20110021928METHODS AND SYSTEM OF DETERMINING CARDIO-RESPIRATORY PARAMETERS - Embodiments of the present invention provide noninvasive methods and systems of determining and monitoring an individual's respiration pattern, respiration rate, other cardio-respiratory parameters or variations thereof.01-27-2011
20090012408GARMENT FOR BIOINFORMATION MEASUREMENT HAVING ELECTRODE, BIOINFORMTION MEASUREMENT SYSTEM AND BIOINFORMATION MEASUREMENT DEVICE, AND DEVICE CONTROL METHOD - The present invention provides a garment for measuring biological information, a biological information measurement system, a biological information measurement device and a method of controlling thereof capable of measuring biological information with accuracy regardless of variations of the constitution of each examinee. When an examinee wears a biological information measurement shirt 01-08-2009
20120238886SYSTEMS AND METHODS TO INDICATE HEART FAILURE CO-MORBIDITY - Systems and methods to indicate heart failure co-morbidity are described. In an example, one or more physiological signals can be analyzed for a specified time period to determine at least one of an indication of a heart failure event or a characteristic of heart failure co-morbidity, such as a characteristic of a non-heart failure physiological event. At least one of the different physiological signals can be compared to a specified criterion indicative of the heart failure event to provide a comparison value, where the comparison value is indicative of whether the at least one of the different physiological signals contributed towards the indication of the heart failure event. An indication of a non-heart failure physiological event can be determined using the heart failure event indication, the non-heart failure physiological event characteristic, and the comparison value indicative of whether the one or more physiological signals contributed towards the heart failure event.09-20-2012
20120215116METHOD AND APPARATUS FOR ESTIMATING ENERGY CONSUMPTION - The present invention relates to a method and apparatus for estimating the energy consumption of a person on the basis of heart rate data. In the method, the beat rate of heart is measured with a sensor or previously measured heart rate data are input for providing heart rate data and the energy consumption of a person is determined on the basis of heart rate data. According to the invention, a first threshold value is selected for the mass of the person and in case the mass of the person is larger than the first threshold value, energy consumption is calculated using a formula taking into account the deviation of the person's mass from the said first threshold value. The invention allows getting more accurate energy consumption estimates especially for overweight persons.08-23-2012
20100191128Volume Status Monitor: Peripheral Venous Pressure, Hypervolemia and Coherence Analysis - Systems and methods are provided for monitoring changes in blood volume using waveforms in the peripheral vasculature. In particular, the systems and methods relate to detecting ventilation-induced variation (VIV) of waveforms in the peripheral vasculature. Advantageously, the systems and methods may relate to analyzing VIV in peripheral venous pressure (PVP). Thus, the VIV of PVP may be measured, wherein decreased VIV is indicative of decreased blood volume In exemplary embodiments, such as involving spontaneous breathing, it may be necessary to account for changes in respiratory signal strength. Thus systems and methods are also provided for assessing coherence between ventilation and VIV for a flow or pressure waveform. Specifically, coherence is evaluated by comparing the waveform to a detected respiratory signal. Finally, systems and method are provided for distinguishing the impact of respiration on the PG signal during hypervolemia as compared to hypovolemia. Such systems and methods may advantageously be utilized to monitor fluid status during fluid replacement.07-29-2010
20100198083Random Body Movement Cancellation for Non-Contact Vital Sign Detection - A method and system for cancelling body movement effect for non-contact vital sign detection is described. The method begins with sending on a first electromagnetic wave transceiver a first electromagnetic signal with a first frequency to a first side of a body, such as a person or animal. Simultaneously using a second electromagnetic wave transceiver a second electromagnetic signal is sent with a second frequency to a second side of a body, wherein the first frequency and the second frequency are different frequencies. A first reflected electromagnetic signal reflected back in response to the first electromagnetic wave on the first transceiver is received and a first baseband complex signal is extracted. Likewise a second reflected electromagnetic signal reflected back in response to the second electromagnetic wave on the second transceiver is received and a second baseband complex signal is extracted. The first baseband complex signal is mathematically combined with the second baseband complex signal to cancel out a Doppler frequency drift therebetween to yield a periodic Doppler phase effect.08-05-2010
20090326387Electrocardiogram and Respiration Monitoring in Animals - An ambulatory animal monitoring system includes a wearable structure constructed to be worn about a body of a non-human animal to be monitored. The system includes a plurality of electrical signal conduits each associated with the wearable structure and each connectable to a different one of a plurality of surface electrode components. The system includes processing and control device adapted to be worn with the wearable structure, the processing and control device comprising a) an ECG monitoring component and b) an impedance level monitoring component that generates data indicative of electrical impedance levels of the animal over time.12-31-2009
20100268093METHOD AND SYSTEM TO MEASURE ECG AND RESPIRATION - A method for monitoring the respiration rate of a patient includes attaching a plurality of electrocardiogram (ECG) electrodes and a pressure sensor to a patient, producing a first respiration signal based on variations detected in signals provided by the ECG electrodes attached to the patient, and producing a second respiration signal based on pressure variations detected in the pressure sensor secured to the patient. The method also includes selecting at least one of the first respiration signal and the second respiration signal based on respective signal qualities and producing a respiration rate from the selected signal. The method also includes providing indicia of the respiration rate. The method may also include displaying ECG signals with the indicia of the respiration rate.10-21-2010
20100268094Consumer electronic camera photoplethysmograph - A body part is placed on or near a consumer electronic device camera. The camera senses periodic light variations. A program analyses variations in images captured by the digital camera to determine pulse rate or breathing rate.10-21-2010
20100241009Systems and Methods for Detecting Movement of a Target - A system is disclosed for wirelessly detecting movement of a target. The system comprises a reference oscillator, a transmitter, a receiver, a demodulator, and a processor, wherein: the reference oscillator generates references frequencies for the transmitter, the receiver, and the demodulator; the transmitter generates a continuous-wave signal at a frequency based on the transmitter reference frequency and wirelessly transmits it to the target; the receiver wirelessly receives a reflected signal from the target having a phase angle corresponding to movement of the target and converts the reflected signal into an intermediate frequency signal based on the receiver reference frequency; the demodulator demodulates the intermediate frequency signal into an in-phase component and a quadrature component; and the processor converts the in-phase component and the quadrature component into a movement signal corresponding to movement of the target.09-23-2010
20100249611 Respiratory Signal Processing Method - This Invention relates to a respiratory signal processing method, including the following steps: A. Obtain the respiratory physiological signals by means of a specific respiratory circuit, AD collects and obtains the respiratory digital signals and applies the data preprocessing to such signals; B. Convert frequency spectrum of the preprocessed respiratory signals and obtain the distribution of their frequency domain; C. Judge whether there is asphyxia in accordance with the properties of respiratory signal's physiological parameters; D. Introduce the physiological parameters of heart activities and analyze frequency spectrum distribution of respiratory signals and judge whether there is any interference from heart activities; E. Analyze the spectral energy envelop of respiratory waveform and find out the correct spectral peak, and then convert the frequency point corresponding to the spectral peak to the respiratory rate so as to obtain the value of current respiratory rate by integrating with the previous values of respiratory rate. The processing methods under this Invention can maximize the accuracy of results of respiratory rate and improve the stability of such result remarkably.09-30-2010
20110295127Vibro-Acoustic Detection of Cardiac Conditions - Apparatus and methods for vibro-acoustic detection of cardiac conditions are disclosed. An example method includes calculating a frequency difference between a first frequency of a first cardiac signal and a second frequency of a second cardiac signal; calculating an amplitude difference between the first cardiac signal and the second cardiac signal; calculating a root-mean-square value based on a difference between the first cardiac signal and the second cardiac signal; calculating a value based on the frequency difference, the amplitude difference, and the root-mean-square value; and detecting a cardiac condition based on the value.12-01-2011
20120089032METHOD AND SYSTEM FOR DISCRIMINATING AND MONITORING ATRIAL ARRHYTHMIA BASED ON CARDIOGENIC IMPEDANCE - A medical device is provided that comprises a lead assembly. The lead assembly includes at least one intra-cardiac (IC) electrode, an extra-cardiac (EC) electrode and a subcutaneous remote-cardiac (RC) electrode. The IC electrode is configured to be located within the heart. The EC electrode is configured to be positioned proximate to at least one of a superior vena cava (SVC) and a left ventricle (LV) of a heart. The RC electrode is configured to be located remote from the heart. An arrhythmia monitoring module is configured to analyze intra-cardiac electrogram (IEGM) signals from the at least one IC electrode to identify a potential atrial arrhythmia. An extra-cardiac impedance (ECI) module is configured to measure extra-cardiac impedance along an ECI vector between the EC and RC electrodes to obtain ECI measurements. The hemodynamic performance (HDP) assessment module is configured to determine a hemodynamic performance based on the ECI measurements. The arrhythmia monitoring module is configured to declare the potential atrial arrhythmia to be an atrial arrhythmia based on the hemodynamic performance determined from the ECI measurements. The medical device further provides the HDP assessment module that derives a current ECI waveform from current ECI measurements and compares the current ECI pattern with a prior ECI waveform that is derived from prior ECI measurements.04-12-2012
20090312649NIGHT RESPIRATION RATE FOR HEART FAILURE MONITORING - The invention refers to a monitoring device for monitoring and analyzing physiological signals. The monitoring device comprises a transthoracic impedance measurement unit and an evaluation unit connected to the transthoracic impedance measurement unit. The transthoracic impedance measurement unit is adapted to conduct a transthoracic impedance measurement and to generate a transthoracic impedance signal representing a measured transthoracic impedance at consecutive points in time. The evaluation unit being configured to process the transthoracic impedance signal received from the transthoracic impedance measurement unit and to thus generate a respiration signal and to generate therefrom an evaluation signal reflecting at least a diurnal pattern of the respiration rate.12-17-2009
20080312541Daytime/nighttime respiration rate monitoring - A device and method can monitor or trend a patient's respiration rate measurements according to the time of day. The device, which may be implantable or external, collects and classifies respiration rate measurements over time. The trended information about particular classes of respiration rate measurements is then communicated to a remote external device, which in turn provides an indication of heart failure decompensation. Examples of classes of respiration rate measurements include a daily maximum respiration rate value, a daily minimum respiration rate value, a daily maximum respiration rate variability value, a daily minimum respiration rate variability value, and a daily central respiration rate value. These respiration rate measurements can be further classified into daytime or nighttime respiration rate measurements.12-18-2008
20100137723APNEA TYPE DETERMINING APPARATUS AND METHOD - An apnea classification system provides for apnea monitoring and differentiation based on several sleep apnea related parameters for diagnostic and therapeutic purposes. Monitoring of such sleep apnea related parameters allows the apnea classification system to differentiate among the different types of apnea. This information may then be used to determine the best method of therapy, or adjust current therapy parameters to more effectively treat a subject.06-03-2010
20100280394MEDICAL DEVICE FOR ATRIAL FIBRILLATION PREDICTION - In a device and a method for providing correlated measures for predicting potential occurrence of atrial fibrillation, an impedance of the patient is measured to obtain impedance information; cardiogenic data is determined from the information; respiratory data is determined from the information; at least one hemodynamic measure is calculated from the cardiogenic data and at least one apnea measure is calculated from the respiratory data; the hemodynamic and apnea measures are correlated such that the correlated measures can be utilized for predicting potential occurrence of atrial fibrillation.11-04-2010
20110009753Respiration Rate Trending for Detecting Early Onset of Worsening Heart Failure - Patient respiration is sensed from which respiration measurements are made, including a median respiration rate (MedRR) and a maximum respiration rate (MaxRR). Determinations are made as to whether an abnormality exists in MedRR and in MaxRR. An output indicative of the patient's tachypnea status is generated in response to determining the abnormality in MedRR and MaxRR.01-13-2011
20120296221METHOD AND APPARATUS FOR DETERMINING A RESPIRATION SIGNAL - The invention relates to a method and apparatus for determining a respiration of a subject (11-22-2012
20100298718Multiple Mode, Portable Patient Monitoring System - The specification discloses a number of embodiments directed to patient monitoring systems. The system determines a physiological parameter of a patient and includes an input device for receiving a plurality of physical inputs from a user, such as finger taps, and communicating to a memory interval data indicative of the frequency at which the plurality of physical inputs are received from the user within a time period and a processor in data communication with said memory wherein said processor determines at least one physiological parameter of a patient based upon said interval data.11-25-2010
20090118626Calculating Respiration Parameters Using Impedance Plethysmography - A method of determining a value for a respiration parameter in a test subject can include capturing—using a fully implanted system that includes a wireless transmitter and at least a first lead wire having a first electrode disposed thereon and a second lead wire having a second electrode disposed thereon—information indicative of an impedance measure between the first and second electrodes and across a thoracic region of the test subject; wirelessly transmitting, from the implanted system and to external equipment, the captured information; and determining a respiration parameter of the test subject based on the captured information. The at least first and second lead wires can be positioned in the test subject subcutaneously and external of any cranial, thoracic, abdominal and pelvic cavities of the test subject05-07-2009
20110270097METHOD AND APPARATUS FOR ASSESSMENT OF FLUID RESPONSIVENESS - Disclosed embodiments include a method and related apparatus for determining a physiological parameter from the arterial blood pressure signal, the photoplethysmographic signal, the electrocardiogram, or any other a physiologic signal whose pulse amplitude variation is affected by respiration and it is indicative of fluid status in order to quantify the degree of amplitude modulation due to respiration (pulse variation) and help assess fluid responsiveness.11-03-2011
20100210953System and method for heart and activity monitoring - A system and method determining physiological status of a patient. A determination is made whether the patient is sleeping. The amplitude and change in voltage over time of any intramyocardial electrogram is measured for a right ventricle and a left ventricle of a heart of the patient for a predefined number of heartbeats at a specified time interval in response to determining the patient is asleep. The measurements are averaged for the right ventricle and left ventricle. The averaged measurements are transmitted to a receiver for communication to an intended recipient.08-19-2010
20120197138BIOLOGICAL PARAMETER MONITORING METHOD, COMPUTER-READABLE STORAGE MEDIUM AND BIOLOGICAL PARAMETER MONITORING DEVICE - A method for monitoring a biological parameter out of either the heartbeat and/or respiratory signal of an occupant on a member of a seat or bed, wherein a signal or signals received from one or a plurality of sensors connected to the member and capable of detecting the variation of pressure due to contact are processed by non-linear filtering. For example, the method is mounted on a vehicle and used. Also provided is a computer program including code instructions capable of controlling execution of the method of the invention when the method is executed by a computer. Further provided is a monitoring device for monitoring a biological parameter out of either the heartbeat and/or respiratory signal of an occupant on a member of a seat or bed.08-02-2012
20100204587Wavelength Division Sensing Method and Apparatus for Doppler Radar Vital Sign Monitoring and Mechanical Vibration Monitoring - Embodiments of the present invention provide a method and a radar system incorporating multiple carrier wavelengths. A multi-carrier radar method and system according to the present invention can be used to realize sensing of complex pattern vibrations using a wavelength division sensing technique.08-12-2010
20090137911Electrode Positioning - In a method and device for positioning a linear array of electrodes mounted on a distal end section of an elongated flexible member in a patient's respiratory airways at the level of the patient's diaphragm, a length of the elongated flexible member pre-determined to position the linear array of electrodes at the level of the patient's diaphragm is inserted through the patient's respiratory airways. Signals representative of an electrical activity of the patient's diaphragm (EAdi) are detected through the electrodes of the linear array, a presence or absence of ECG signal components is detected in the EAdi signals, and the position of the linear array of electrodes in the patient's respiratory airways is detected in response to the presence or absence of the ECG signal components in the EAdi signals. Also, lower esophageal sphincter activity may be detected in the EAdi signals, and the position of the linear array of electrodes in the patient's respiratory airways determined in response to the detected lower esophageal sphincter. Finally, an end-expiratory occlusion of the patient's respiratory airways may be performed to verify that the electrical activity of the diaphragm coincides with a negative deflection of the patient's respiratory airways pressure again in view of determining adequate positioning of the linear array of electrodes.05-28-2009
20090326388Systems And Methods For Processing Signals With Repetitive Features - The present disclosure relates to systems and methods for detecting features of a signal. According to embodiments, by transposing segments of a signal, such as segments representing pulses in a PPG signal, such that they are stacked next to each other, various characteristics about the signal may be discerned such as information about repetitive features of the signal. According to an embodiment, from a PPG signal respiration information may be determined about individual breaths, blood pressure changes may be determined, and information about other physiological parameters affecting the PPG signal may be determined.12-31-2009
20090292215SLEEP QUALITY INDICATORS - A method for diagnosis includes acquiring a physiological signal from a patient (11-26-2009
20090198139Daytime/nighttime respiration rate monitoring - A device and method can monitor or trend a patient's respiration rate measurements according to the time of day. The device, which may be implantable or external, collects and classifies respiration rate measurements over time. The trended information about particular classes of respiration rate measurements is then communicated to a remote external device, which in turn provides an indication of heart failure decompensation. Examples of classes of respiration rate measurements include a daily maximum respiration rate value, a daily minimum respiration rate value, a daily maximum respiration rate variability value, a daily minimum respiration rate variability value, and a daily central respiration rate value. These respiration rate measurements can be further classified into daytime or nighttime respiration rate measurements.08-06-2009
20080262360USING RESPIRATION DISTRESS MANIFESTATIONS FOR HEART FAILURE DETECTION - Systems and methods for diagnosing one or more respiration distress manifestations by implantably recognizing their occurrence and evaluating information about the same to provide an indication of present or impending worsening heart failure are discussed. Using information produced by an implantable respiration sensor circuit and an implantable physiological sensor circuit, such as at least one of a physical activity sensor circuit or a posture sensor circuit, an implantable or external processor circuit may detect a respiration disturbance and an associated subsequent arousal from stable state occurrence and thereafter evaluate over time arousal from stable state occurrences to provide the indication of present or impending worsening heart failure. In one example, information about a fluid level within a subject is used in determining the indication of worsening heart failure. In various examples, a regimen is initiated or adjusted in response to the indication of present or impending worsening heart failure.10-23-2008
20120078122SLEEPINESS ASSESSMENT APPARATUS - A sleepiness assessment value P03-29-2012
20080319326SYSTEM, SOFTWARE, AND METHOD FOR DETECTION OF SLEEP-DISORDERED BREATHING USING AN ELTROCARDIOGRAM - A system to form and store an electrocardiogram (ECG) signal derived from a cardiac electrical signal that includes an apparatus having a pair of the electrodes to connect to a patient to detect the cardiac electrical signal. A signal sampler samples the cardiac electrical signal to form the ECG signal. A data storage device stores the ECG signal. A computer communicates with the data storage device to retrieve the ECG signal for analysis by software stored in the memory of the computer. The software analyzes a morphology of the amplitude of a plurality of R-wave peaks contained within the ECG signal and/or analyzes a morphology of the area of a plurality of QRS complex pulses contained within the ECG signal.12-25-2008
20100185102MOVEMENT DETECTION DURING RADIATION TREATMENT USING A RADAR SYSTEM - The present embodiments relate to irradiating a patient with an irradiation source directed onto the patient, as well as with a radar system for detecting the position of the patient or a part of the patient during the irradiation.07-22-2010
20100191127METHOD AND SYSTEM FOR ESTIMATING EXERCISE CAPACITY - A method of estimating exercise capacity of a subject is disclosed. The method uses output radiofrequency signals transmitted to the subject during exercise and input radiofrequency signals received from the subject during exercise. The method comprises: determining a phase shift of the input radiofrequency signals relative to the output radiofrequency signals; calculating cardiac output based on the phase shift; and using the cardiac output for estimating the exercise capacity of the subject.07-29-2010
20110130666ENHANCED REPORTING OF PATHOLOGICAL EPISODES - An apparatus comprises a sensor circuit configured to produce a time-varying physiologic sensor signal of a subject and a pathology detection circuit communicatively coupled to the sensor. The pathology detection circuit is configured to detect a first pathological episode using the sensed physiologic sensor signal, deem that the first pathological episode has ended, detect at least one second pathological episode using the sensed physiologic sensor signal, and indicate the first and second pathological episodes as one pathological episode if the first and second episode are detected within a specified time interval.06-02-2011
20100217133ELECTROCARDIOGRAM DERIVED APNOEA/HYPOPNEA INDEX - The present invention provides a method and apparatus for determining the occurrence of apnoeas or hypopneas from ECG signal data alone. The method is carried out by apparatus configured to acquire ECG signals from a sleeping subject, transform the signals to data, and extract ECG features relevant to estimate breathing effort for the determination of respiratory events characteristic of apnoeas and hypopneas. The extracted ECG features are correlates of breathing efforts and are used as surrogate measures of breathing or respiratory events. The method may include calculating an AHI or apnoea/hypopnea index. The method may classify apnoeas into obstructive or central apnoeas.08-26-2010
20100241010Complex Signal Demodulation and Angular Demodulation for Non-contact Vital Sign Detection - Methods for recovering a detected signal in non-contact vital sign detection are provided. According to one embodiment, a detected reflected signal from a non-contact vital sign detection system can be received and provided along I channel and Q channel signal lines. A complex signal S(t) can then be reconstructed from the I channel and Q channel signal lines through complex signal demodulation. A Fourier transform can be used to obtain the detected signal's spectrum for spectrum analysis. Angular demodulation can be used to recover the information corresponding to original body movement. The complex signal demodulation and angular demodulation techniques used to provide information to determine original body movement are capable of avoiding the null detection point without limitations on frequency tuning or channel selection.09-23-2010
20120035486DRUG TITRATION UTILIZING AN IMPLANTABLE MEDICAL DEVICE - A method of monitoring patient status is disclosed. Electrical signals are received from one or more implanted sensors of a cardiac rhythm management device. Two or more index values are calculated from the electrical signals. A composite index is determined from the two or more index values, and a status notification associated with the composite index is provided. In a system for monitoring patient status, a processor is configured to receive electrical signals from an implanted cardiac rhythm management device, calculate two or more index values from the electrical signals, and determine a composite index from the two or more index values. The system incorporates a memory that is in communication with the processor and an interface in communication with the processor, where the interface is configured to communicate a status notification associated with the composite index.02-09-2012
20100222685MACRO-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 decreased09-02-2010
20100198084SENSOR COMPRISING A MATERIAL WHICH GENERATES AN ELECTRICAL SIGNAL IN RESPONSE TO ELONGATION - The present invention relates to a sensor comprising a material which generates an electrical signal in response to elongation. More particularly, the present invention is directed to an apparatus for measuring a length or volume change, which comprises a sensor comprising a piezoelectric material which generates an electrical signal in response to elongation.08-05-2010
20110172544METHOD FOR CONTINUOUS BAROREFLEX SENSITIVITY MEASUREMENT - A medical device and method for determining baroreflex sensitivity (BRS) based on one or more respiration cycles. The BRS determination may be performed continuously based on measurements of heart rate, blood pressure, and respiration cycles.07-14-2011
20100174198APPARATUS FOR MONITORING VITAL SIGNS HAVING FLUID BLADDER BENEATH PADDING - A sleeping monitoring system includes a first padding layer. A fluid bladder is beneath the first padding layer. A sensor is in fluid communication with the fluid bladder. The sensor is configured to output a vital sign signal.07-08-2010
20100174200METHODS AND DEVICES FOR RELIEVING STRESS - Easy to use, cost-effective methods and devices for evaluating and treating stress and thereby disorders caused or exacerbated by stress are provided. More particularly methods and devices for identifying RSA waves during respiration which provide a subject with near real-time RSA wave information are provided. This information can be used in biofeedback settings to assist subjects in reducing levels of stress by achieving rhythmic breathing patterns.07-08-2010
20110034811METHOD AND SYSTEM FOR SLEEP/WAKE CONDITION ESTIMATION - Insomnia is a prevalent sleep disturbance in the general population. As standard diagnostic method for assessing the nature and the severity of the sleep problem, a so-called sleep log or sleep diary, i.e. a questionnaire usually on paper, is used in most cases. The main drawback of this diagnostic tool is that its accuracy is affected by subjective bias of the patient, e.g. for patients it is often difficult to remember sleep and wake periods during the night correctly. The present invention proposes an automatic sleep log that uses vital body signs as input signals for assessing sleep and wake periods during the night. By using objective data, the diagnosis will be more accurate. Furthermore, this system can also be used to sleep restriction therapy, a non-pharmacological method to treat insomnia. Also in this application it can contribute to patients correctly applying this method and thus leading to a better medical outcome.02-10-2011
20090099462APPARATUS AND METHOD FOR MONITORING HEART RATE VARIABILITY - A wrist-worn or arm band worn heart rate variability monitor is provided. Heart rate variability (“HRV”) refers to the variability of the time interval between heartbeats and is a reflection of an individual's current health status. Over time, an individual may use the results of HRV tests to monitor either improvement or deterioration of specific health issues. Thus, one use of the HRV test is as a medical motivator. When an individual has a poor HRV result, it is an indicator that they should consult their physician and make appropriate changes where applicable to improve their health. If an individual's HRV results deviate significantly from their normal HRV, they may be motivated to consult their physician. In addition, the inventive monitor is capable of monitoring the stages of sleep by changes in the heart rate variability and can record the sleep (or rest) sessions with the resulting data accessible by the user or other interested parties. Alternate embodiments of the invention allow assistance in the diagnosis and monitoring of various cardiovascular and sleep breathing disorders and/or conditions. Other embodiments allow communication with internal devices such as defibrillators or drug delivery mechanisms. Still other embodiments analyze HRV data to assist the user in avoiding sleep.04-16-2009
20110087115Systems and Methods For Ambulatory Monitoring of Physiological Signs - The present invention relates to the field of ambulatory and non-invasive monitoring of a plurality of physiological parameters of a monitored individual. The invention includes a physiological monitoring apparatus with an improved monitoring apparel, the apparel having sensors for monitoring parameters reflecting pulmonary function and/or parameters reflecting cardiac function and/or parameters reflecting the function of other organ systems. The apparel is preferably also suitable for medical, athletic, and for other uses. The sensors include one or more inductive plethysmographic sensors positioned to monitor at least basic pulmonary parameters, and optionally also basic cardiac parameters. The sensors include one or more ECG sensor electrodes that preferably include a flexible, conductive fabric. The monitoring apparatus also includes an electronic unit for receiving data from the sensors and for storing the data in a computer-readable medium and/or wirelessly transmitted the data. The invention also includes systems for receiving, storing, and processing data generated by one or more physiological monitored apparatuses.04-14-2011
20100069761Method For Determining Hemodynamic Effects Of Positive Pressure Ventilation - The present disclosure relates, in some embodiments, to devices, systems, and/or methods for collecting, processing, and/or displaying stroke volume and/or cardiac output data. For example, a device for assessing changes in cardiac output and/or stroke volume of a subject receiving airway support may comprise a processor; an airway sensor in communication with the processor, wherein the airway sensor is configured and arranged to sense pressure in the subject's airway, lungs, and/or intrapleural space over time; a blood volume sensor in communication with the processor, wherein the blood volume sensor is configured and arranged to sense pulsatile volume of blood in a tissue of the subject over time; and a display configured and arranged to display a representative of an airway pressure, a pulsatile blood volume, a photoplethysmogram, a photoplethysmogram ratio, the determined cardiac output and/or stroke volume, or combinations thereof. A method of assessing changes in cardiac output or stroke volume of a subject receiving airway support from a breathing assistance system may comprise sensing pressure in the subject's airway as a function of time, sensing pulsatile volume of blood in a tissue of the subject as a function of time, producing a photoplethysmogram from the sensed pulsatile volume, determining the ratio of the amplitude of the photoplethysmogram during inhalation to the amplitude of the photoplethysmogram during exhalation, and determining the change in cardiac output or stroke volume of the subject using the determined ratio.03-18-2010
20100056929Syncope Logbook and Method of Using Same - Methods and systems are directed to acquiring and organizing information associated with at least one syncope event. A syncope event may be a suspected syncope event, a verified syncope event or a syncope event that is suspected and verified. Automated processes are used to collect information associated with at least one syncope event and organize the information as a syncope log entry. At least one of acquiring the information and organizing the information is performed at least in part implantably.03-04-2010
20120302900METHOD AND APPARATUS FOR PROCESSING A CYCLIC PHYSIOLOGICAL SIGNAL - The invention relates to a method and apparatus for processing a cyclic physiological signal (11-29-2012
20120302899SENSOR AND SENSING METHOD THEREOF - A biosignal measuring sensor and a biosignal measuring method are provided. The biosignal measuring sensor includes an oscillator, a signal detection unit, and a signal processing unit. The amount of oscillation frequency shift of the oscillator is detected as intensity change of a biosignal, and a pulse signal and a respiration signal are detected from the detected biosignal. In the biosignal measuring sensor and the biosignal measuring method, a biosignal is detected in a manner of non-contact with a biosignal measuring target. Moreover, the biosignal may be detected accurately at a close range.11-29-2012
20120302898ACOUSTIC BASED COUGH DETECTION - The present disclosure is directed to the detection of coughs and coughing episodes using acoustic signals. In various examples, an implantable medical device processes an acoustic signal obtained from an acoustic sensor to determine whether a patient has coughed. In some examples, the implantable medical device also performs a cough severity assessment. In some examples, the cough severity assessment may include a determination of the depth of the cough, the duration of the coughing episode, or whether the cough was wet or dry.11-29-2012
20130165799BIO-SIGNAL TRANSFER DEVICE, BIO-SIGNAL MONITORING SYSTEM, AND METHOD USING THE SAME - Disclosed is a bio-signal monitoring system which includes a bio-signal transfer device which measures and analyzes a bio-signal and sends the analyzed bio-signal and first identification information; a reception device which includes at least one or more receivers, each receiver transferring information received from the bio-signal transfer device and second identification information; and a monitoring server which analyzes information received from each receiver and judges location and physical condition of a user, wherein the first identification information includes ID of the user and ID of the bio-signal and the second identification information includes ID of the receiver.06-27-2013
20110257536 METHOD FOR DETECTING HEARTBEAT AND/OR RESPIRATION - A method for detecting heartbeat and/or respiration is provided. The method provided includes receiving a wave signal, and analyzing the received wave signal using a heartbeat and/or respiratory model, thereby providing a result signal indicating whether the received wave signal represents heartbeat and/or respiration.10-20-2011
20110257535SYSTEM AND A METHOD FOR CARDIAC MONITORING - A system for monitoring a heart of a patient, the system includes: (i) a physiological data input interface, operative for receiving signals indicative of cardiac activity of the patient; (ii) a processor configured to process the signals to provide monitoring results; and (iii) an output interface operative to provide the monitoring results; wherein the monitoring results include information indicative of: (a) a heart rate of the patient during a monitoring period; (b) at least one first time period in which the heart rate of the patient exceeded a first threshold; and (c) at least one second time period in which the heart rate of the patient exceeded both the first threshold and a second threshold.10-20-2011
20120203117VITAL SIGNS DETECTING DEVICE AND A METHOD FOR DETECTING VITAL SIGNS - A vital signs detecting device and a method for detecting vital signs are provided. The vital signs detecting device comprises a detection unit; a multimode optical fiber configured to be connected to a light source and to the detection unit; a mechanical structure configured for receiving a pressure exerted by a person's body as a result of one or more of a group consisting of a movement of the person's body, a respiratory action of the person's body and a heart beat action of the person's body and to cause microbending of the multimode optical fiber under the exerted pressure and; wherein the multimode optical fiber is disposed between first and second sets of microbending elements of the mechanical structure substantially in a direction of the exerted pressure.08-09-2012
20110263988SENSING RATE OF CHANGE OF PRESSURE IN THE LEFT VENTRICLE WITH AN IMPLANTED DEVICE - An implantable device and method for monitoring S1 heart sounds with a remotely located accelerometer. The device includes a transducer that converts heart sounds into an electrical signal. A control circuit is coupled to the transducer. The control circuit is configured to receive the electrical signal, identify an S1 heart sound, and to convert the S1 heart sound into electrical information. The control circuit also generates morphological data from the electrical information. The morphological data relates to a hemodynamic metric, such as left ventricular contractility. A housing may enclose the control circuit. The housing defines a volume coextensive with an outer surface of the housing. The transducer is in or on the volume defined by the housing.10-27-2011
20120150050APPARATUS AND METHOD FOR ESTIMATING STROKE VOLUME OF THE HEART USING BIO-IMPEDANCE TECHNIQUES - A method of estimating stroke volume of the heart is described. In this method, the volume of the heart is estimated from electrical impedance data of the chest, at two different phases of the cardiac cycle. The stroke volume is estimated from the difference between the volumes estimated at the two phases.06-14-2012
20100179438SYSTEM AND METHOD FOR MONITORING CARDIORESPIRATORY PARAMETERS - An apparatus, system, and method is disclosed for monitoring the motion, breathing, heart rate of humans in a convenient and low-cost fashion, and for deriving and displaying useful measurements of cardiorespiratory performance from the measured signals. The motion, breathing, and heart rate signals are obtained through a processing applied to a raw signal obtained in a non-contact fashion, typically using a radio-frequency sensor. Processing into separate cardiac and respiratory components is described. The heart rate can be determined by using either spectral or time-domain processing. The respiratory rate can be calculated using spectral analysis. Processing to derive the heart rate, respiratory sinus arrhythmia, or a ventilatory threshold parameter using the system is described. The sensor, processing, and display can be incorporated in a single device which can be worn or held close to the body while exercising (e.g., in a wristwatch or mobile phone configuration), or alternately placed in a fixed piece of exercise equipment at some distance form the body (e.g., in a treadmill dash panel), and may also be integrated with other sensors, such as position locators.07-15-2010
20090171221System apparatus for monitoring heart and lung functions - A system for monitoring heart and lung functions comprises an audio signal sensing unit, an audio signal processing unit, an electrocardiogram signal sensing unit, an electrocardiogram signal processing unit, and a microprocessor unit. The audio signal sensing unit senses audio signals, including a heart sound and a lung sound. The audio signal processing unit is connected to the audio signal sensing unit and processes the audio signals to obtain the heart sound and the lung sound. The electrocardiogram signal sensing unit senses an electrocardiogram signal. The electrocardiogram signal processing unit is connected to the electrocardiogram signal sensing unit and processes the electrocardiogram signal. The microprocessor unit is connected to the audio signal processing unit, the electrocardiogram signal processing unit and a computer host, and processes the heart sound, the lung sound and the electrocardiogram signal to be data that can be identified by the computer host.07-02-2009
20110190642Method of detecting sleep apnea and treatment thereof - A method is presented for evaluating whether an episode of sleep apnea is occurring in a patient suffering from chronic sleep apnea disorder, for delivery of appropriate therapy. The method, performed by an implantable device, includes sensing the patient's EKG signal and using electrical energy generated by the heart to power subsequent signal processing. This signal is applied as the sole input to a differential signal processing circuit for passage through both a high impedance path and a substantially lower impedance path and amplification of the difference in magnitude between the resulting two signals, to determine changes in the patient's thoracic impedance. Based on such changes, the presence or absence of patient ventilation is detected, to enable an assessment of whether an episode of sleep apnea is occurring. An actual episode of sleep apnea is deemed to have occurred if lack of ventilation exceeds a predetermined interval of time between otherwise regular respiratory cycles. If sleep apnea is indicated, the appropriate therapy is delivered by the device to induce ventilation and halt the apnea episode.08-04-2011
20110201945HEMODYNAMIC STABILITY DETECTION DURING ARRHYTHMIA USING RESPIRATION SENSOR - Detected changes in respiration parameters, either alone or in conjunction with other physiological signals, can be used to discriminate between hemodynamically stable and hemodynamically unstable tachyarrhythmias.08-18-2011
20100030085SYSTEM FOR MONITORING AND ANALYSING CARDIORESPIRATORY SIGNALS AND SNORING - Extraction of components of the a signal captured by an accelerometer, obtaining information about physiological data such as cardiac, respiratory and snoring activity. The extracted signal components are useful for the diagnosis of different types of abnormal respiratory phenomena during sleep (apneas, hypopneas and respiratory efforts associated to micro-arousals).02-04-2010
20090054792HEARTBEAT/RESPIRATION SENSOR AND BODY MONITOR EMPLOYING SAME - Heartbeat/respiration sensor 02-26-2009
20110071406Determining A Characteristic Respiration Rate - The present disclosure relates to monitoring a characteristic respiration rate of a patient based at least in part on a suitable time period that either precedes or follows a triggering event, such as a clinician/patient interaction, where the triggering event may negatively impact the physiological parameter. In some embodiments, physiological parameter values falling between one or more pre-set thresholds may be used to derive the characteristic physiological parameter. In some embodiments, monitoring the respiration rate may provide additional information about the patient's status. In some embodiments, confidence measures may be associated with, or may be used to analyze features of the patient signal to derive information about, the characteristic respiration rate. The patient signal used to derive a patient's respiration rate may be of an oscillatory nature or may include oscillatory features that may be analyzed to derive a characteristic respiration rate.03-24-2011
20120046559CROSS-CHECKING OF TRANSTHORACIC IMPEDANCE AND ACCELERATION SIGNALS - A first chamber minute ventilation rate is determined based on a first transthoracic impedance signal received from a first chamber of a heart and a second chamber minute ventilation rate is determined based on a second transthoracic impedance signal received from a second chamber of the heart. A processor compares the minute ventilation rates to determine a rate. In one embodiment, an accelerometer sensor provides data for evaluating propriety of a rate. Before implementing a rate change, signals from multiple sensors are cross-checked.02-23-2012
20110066042ESTIMATION OF BLOOD FLOW AND HEMODYNAMIC PARAMETERS FROM A SINGLE CHEST-WORN SENSOR, AND OTHER CIRCUITS, DEVICES AND PROCESSES - An electronic monitoring device includes an electronic processor (03-17-2011
20120209128METHOD FOR CONTROLLING A SPIROERGOMETRIC SYSTEM AND SPIROERGOMETRIC SYSTEM - Shown and described is a method for controlling and/or regulating a spiroergometry system (08-16-2012
20120010514BIOLOGICAL PARAMETER MONITORING METHOD, COMPUTER-READABLE STORAGE MEDIUM AND BIOLOGICAL PARAMETER MONITORING DEVICE - A method for monitoring a biological parameter out of either the heartbeat and/or respiratory signal of an occupant on a member of a seat or bed. The member supports at least one sensor capable of detecting variation of pressure due to contact, and at least one accelerometer is connected to the member. A model of a transfer function between at least one signal from one accelerometer out of either the accelerometer and/or at least one accelerometer at the input and a signal from a sensor out of either the sensor and/or a plurality of sensors at the output is made, a noise value is estimated using this model, and the estimated noise value is removed from the signal from the sensor.01-12-2012
20120310099MONITORING OF HEART SOUNDS - A system comprises an implantable medical device (MID) including an implantableimplantabie heart sound sensor circuit configured to produce an electrical heart sound signal representative of a heart sound of a subject and a processor circuit. The processor circuit is coupled to the heart sound sensor circuit and includes a detection circuit, a heart sound feature circuit and a trending circuit. The detection circuit configured to detect a physiologic perturbation and the heart sound feature circuit is configured to identify a heart sound feature in the electrical signal. The processor circuit is configured to trigger the heart sound feature circuit in relation to a detected physiologic perturbation. The trending circuit is configured to trend the heart sound feature in relation to a recurrence of the physiologic perturbation. The processor circuit is configured to declare a change in a physiologic condition of the patient according to the trending.12-06-2012
20120016247BIOLOGICAL PARAMETER MONITORING METHOD, COMPUTER-READABLE STORAGE MEDIUM AND BIOLOGICAL PARAMETER MONITORING DEVICE - A method for monitoring a biological parameter out of either the heartbeat and/or respiratory signal of an occupant on a member of a seat or bed. The member supports sensors, receives the signal from each of the group of sensors, inputs the signal into an atom dictionary, selects some sensors according to the input, and performs monitoring using only the selected sensors. Also provided is a computer program including code instructions capable of controlling execution of the method of the invention when the method is executed by a computer. Further provided is a monitoring device for monitoring a biological parameter out of either the heartbeat and/or respiratory signal of an occupant on a member of a set or bed.01-19-2012
20120059268ULTRA WIDEBAND (UWB) BABY MONITORS FOR DETECTION OF INFANT CARDIOPULMONARY DISTRESS - Ultra wideband patient monitoring systems, and particularly baby monitoring systems, adapted to prevent reflective loss between the antenna and the patient's body. The devices, systems and methods described herein may be used to efficiently couple UWB energy to a patient for patient monitoring. In particular, described herein are impedance transformer pads, mats and the like, upon which a patient may comfortably lie while being monitored via one or more UWB sensors (e.g., antenna); the impedance transformer pads help match the impedance and prevent reflective loss of UWB energy. Also described herein are bassinets, including NICU bassinets and baby monitors.03-08-2012
20120157859DEVICE TO ASSIST IN THE PRACTICE OF A PHYSICAL ACTIVITY SESSION, AND PHYSICAL ACTIVITY APPARATUS PROVIDED WITH SUCH A DEVICE - The invention relates to a device to assist in the practice of a physical activity session by an person. The device has an electronic means for determining the real-time physical effort to be provided by said person during said session, implementing a control law having, as an output, a parameter that corresponds to the physical effort to be provided (EPF) and, as an input, data collected while the force is being applied, essentially comprising: the measurement of the heart rate (FC) of said person; the measurement of the respiratory rate (FR) of said person; and one or more indices (EVA) of strenuousness of the effort as perceived by said person, to be specified by said person during the effort, and in which said control law depends essentially on respective programmed thresholds which should not be exceeded, essentially comprising: the maximum heart rate (FC06-21-2012
20120065524MOTION DETERMINATION APPARATUS - The invention relates to a motion determination apparatus for determining motion of a moving object, wherein the motion determination apparatus (03-15-2012
20120157858MONITORING PROJECTIONS ALONG PRINCIPAL COMPONENTS OF MULTIPLE SENSORS AS AN INDICATOR OF WORSENING HEART FAILURE - A device can include at least a first physiologic sensor circuit configured to provide a first physiologic signal, a second physiologic sensor circuit configured to provide a second physiologic signal, and a processor circuit. The processor circuit includes a principal component analysis circuit configured to represent data determined from the at least first and second physiologic sensor circuits as at least first and second axes, respectively, in a multidimensional space, determine one or more principal components in the multidimensional space, determine a quantitative attribute of the first and the second physiologic signals using at least one of the determined principal components or a projection of the data along the at least one determined principal component, and provide an indication of heart failure status according to the quantitative attribute to at least one of a user or a process.06-21-2012
20120157860PULSE MEASURING DEVICE AND METHOD - According to an embodiment, a pulse measuring device includes a pulse detecting unit, an amplitude calculating unit, an interval calculating unit, an extracting unit, and a determining unit. The pulse detecting unit is configured to detect a pulse of a subject. The amplitude calculating unit is configured to calculate an amplitude of the pulse. The interval calculating unit is configured to calculate an interval of the pulse. The extracting unit is configured to extract a fluctuation variation component which varies in operative association with breathing of the subject from the interval. The determining unit is configured to determine that an apnea event occurs when the amplitude or the interval is reduced at a first time and the fluctuation variation component is reduced at a second time which is immediately before the first time.06-21-2012
20110092826System and method for measuring ECG and breath signals by using two polar electrodes - A system for measuring ECG and breath signals by using two polar electrodes includes a first polar electrode, a second polar electrode and a breath and ECG signals measuring device. The breath and ECG signals measuring device includes a level regulator, a square wave generator, a breath signal process module and an ECG signal process module. The first and second polar electrodes are attached on the body of a person under test to import square wave signal and receive the first and second measuring signals. The level regulator adjusts the voltage reference of the first and second measuring signals. The breath signal process module and the ECG signal process module process and generate a breath signal and an ECG signal respectively.04-21-2011
20120157857RESPIRATORY SIGNAL PROCESSING APPARATUS, RESPIRATORY SIGNAL PROCESSING METHOD, AND PROGRAM - A respiratory signal processing apparatus includes a pulse-based component detection unit configured to detect a pulse-based component from a first signal acquired from a living being, and a pulse-based component removal unit configured to remove the detected pulse-based component from a second signal acquired from the living being, the second signal including respiratory sounds.06-21-2012
20120157856HEART FAILURE DETECTION WITH A SEQUENTIAL CLASSIFIER - A system and method for automatically analyzing heart failure in a patient, including collecting physiological data from a patient using at least a first sensor and a second sensor to collect two or more sensor measurements, and calculating a first composite value based on at least a first sensor measurement wherein the first composite value is an indication of a likelihood that the patient's heart failure status has changed. If the first composite value is outside of a first specified range, then a second composite value is calculated based on at least a second sensor measurement, wherein the second composite value is an indication of a likelihood that the patient's heart failure status has changed. If the second composite value is outside of a second specified range, then an alert of change in heart failure status is generated.06-21-2012
20110066038BODY-WORN MONITOR FOR MEASURING RESPIRATION RATE - The invention provides a multi-sensor system that uses an algorithm based on adaptive filtering to monitor a patient's respiratory rate. The system features a first sensor selected from the following group: i) an impedance pneumography sensor featuring at least two electrodes and a processing circuit configured to measure an impedance pneumography signal; ii) an ECG sensor featuring at least two electrodes and an ECG processing circuit configured to measure an ECG signal; and iii) a PPG sensor featuring a light source, photodetector, and PPG processing circuit configured to measure a PPG signal. Each of these sensors measures a time-dependent signal which is sensitive to respiratory rate and, during operation, is processed to determine an initial respiratory rate value. An adaptive digital filter is determined from the initial respiratory rate. The system features a second sensor (e.g. a digital 3-axis accelerometer) that attaches to the patient's torso and measures an ACC signal indicating movement of the chest or abdomen that is also sensitive to respiratory rate. This second signal is processed with the adaptive filter to determine a final value for respiratory rate.03-17-2011
20110066041MOTION/ACTIVITY, HEART-RATE AND RESPIRATION FROM A SINGLE CHEST-WORN SENSOR, CIRCUITS, DEVICES, PROCESSES AND SYSTEMS - A respiration monitoring device includes an accelerometer (03-17-2011
20110066040PHYSIOLOGIC PARAMETER MONITORING APPARATUS - A physiologic parameter monitor includes a parameter value determiner that determines a parameter value indicative of a response of a human or animal subject to fluid intake during fluid therapy. The parameter value determiner determines the parameter value based on a signal indicative of a non-invasively obtained state of the subject. The physiologic parameter monitor also includes a display that displays the parameter value in a human readable format.03-17-2011
20110066039BODY-WORN MONITOR FOR MEASURING RESPIRATION RATE - The invention provides a multi-sensor system that uses an algorithm based on adaptive filtering to monitor a patient's respiratory rate. The system features a first sensor selected from the following group: i) an impedance pneumography sensor featuring at least two electrodes and a processing circuit configured to measure an impedance pneumography signal; ii) an ECG sensor featuring at least two electrodes and an ECG processing circuit configured to measure an ECG signal; and iii) a PPG sensor featuring a light source, photodetector, and PPG processing circuit configured to measure a PPG signal. Each of these sensors measures a time-dependent signal which is sensitive to respiratory rate and, during operation, is processed to determine an initial respiratory rate value. An adaptive digital filter is determined from the initial respiratory rate. The system features a second sensor (e.g. a digital 3-axis accelerometer) that attaches to the patient's torso and measures an ACC signal indicating movement of the chest or abdomen that is also sensitive to respiratory rate. This second signal is processed with the adaptive filter to determine a final value for respiratory rate.03-17-2011
20110066037BODY-WORN MONITOR FOR MEASURING RESPIRATION RATE - The invention provides a multi-sensor system that uses an algorithm based on adaptive filtering to monitor a patient's respiratory rate. The system features a first sensor selected from the following group: i) an impedance pneumography sensor featuring at least two electrodes and a processing circuit configured to measure an impedance pneumography signal; ii) an ECG sensor featuring at least two electrodes and an ECG processing circuit configured to measure an ECG signal; and iii) a PPG sensor featuring a light source, photodetector, and PPG processing circuit configured to measure a PPG signal. Each of these sensors measures a time-dependent signal which is sensitive to respiratory rate and, during operation, is processed to determine an initial respiratory rate value. An adaptive digital filter is determined from the initial respiratory rate. The system features a second sensor (e.g. a digital 3-axis accelerometer) that attaches to the patient's torso and measures an ACC signal indicating movement of the chest or abdomen that is also sensitive to respiratory rate. This second signal is processed with the adaptive filter to determine a final value for respiratory rate.03-17-2011
20110105915DETECTION AND DIFFERENTIATION OF SLEEP DISORDERED BREATHING - A vector method for monitoring a subject's sleep-disordered breathing utilizing a single, anatomy-attached (anatomically outside or implanted inside), three-orthogonal-axis accelerometer(s), including the steps of (1) collecting from a sleeping subject three-orthogonal-axis data relating to at least one of sound data, subject posture, subject activity, snoring, and respiration, and (2) following such collecting, processing and analyzing collected data to detect associated, disordered breathing including assessing the presence of at least one of (a) sleep-disordered breathing generally, (b) sleep apnea specifically, and (c) differentiation between central and obstructive sleep apnea. Further involved is the acquiring of ECG data, and that the mentioned processing and analyzing include recognition of such acquired ECG data.05-05-2011
20100094139SYSTEM AND METHOD FOR OBTAINING PHYSIOLOGICAL DATA OF A PATIENT - The present invention relates to a system (04-15-2010
20090131803A SLEEP MONITORING SYSTEM - A sleep monitoring system includes an ECG device (05-21-2009
20100204586Detecting Sleep Disorders Using Heart Activity - Systems, methods, apparatus, and computer program products for detecting the existence of a sleep disorder in an individual using heart activity. In one aspect, machine-implemented methods include the actions of analyzing a machine-readable heart rate series of a monitored individual in the time domain using one or more digital data processing devices, detecting a cyclic variation in heart rate in the heart rate series as a result of the analysis in the time domain, and outputting, over an output, a report characterizing a sleep disorder event based on the detection of the cyclic variation in heart rate in the heart rate series. The cyclic variation in heart rate is indicative of a sleep disorder.08-12-2010
20100174199APPARATUS FOR MONITORING VITAL SIGNS OF AN EMERGENCY VICTIM - A portable apparatus for monitoring on site near an emergency field at least one vital sign of a patient reclined thereon includes a fluid bladder transformable between a stowable arrangement and a deployed arrangement. The fluid bladder in the deployed arrangement has a comfortable top surface of sufficient size to fully support at least a torso of the patient in a reclined position, and the fluid bladder has a ruggedized puncture resistant bottom layer. A sensor is configured to detect a pressure within the fluid bladder. A controller is configured to determine the at least one vital sign based on the pressure within the fluid bladder. A triage condition indicator is configured to indicate a care urgency level based on the at least one vital sign.07-08-2010
20120172730METHOD AND SYSTEM FOR DETECTING APNEA - Existing monitors for apnea miss many serious events because they do not adequately distinguish the heart signal in chest impedance from the respiratory signal. Described herein is a respiratory monitoring system and method for improved detection and response to apnea, particularly in a NICU setting but also useful in a home setting. This method filters from the chest impedance the part of the impedance that is caused by the beating of the heart in a human subject, and then identifies in real time significant silence in the filtered chest impedance signal, including determining the probability of apnea. If the probability of apnea exceeds a threshold value, the apneic subject can be stimulated using automated interactions such as a vibrating mattress or air blower.07-05-2012
20120179051APPARATUS AND COMPUTER PROGRAM FOR DETERMINING A PATIENT'S VOLEMIC STATUS REPRESENTED BY CARDIOPULMONARY BLOOD VOLUME - An apparatus for determining a patient's volemic status can make use of a physiological heart-lung interaction during spontaneous breathing or mechanical ventilation. Further, a computer program for determining the patient's volemic status has instructions for carrying out the steps of generating data of a physiological heart-lung interaction during spontaneous breathing or mechanical ventilation, and determining the patient's volemic status when making use of the data of the physiological heart-lung interaction, when run on a computer.07-12-2012
20100145201METHOD FOR MEASURING CENTRAL VENOUS PRESSURE OR RESPIRATORY EFFORT - Photoplethysmography (PPG) is obtained using one red (e.g., 660 nm) and one infrared (e.g., 880 to 940 nm) light emitting diode with a single photo diode in combination with a pressure transducer thereby allowing both CVP and SpO2 to be measured simultaneously. The system also includes sensors capable of measuring position, angle and/or movement of the sensor or patient. Once the PPG signal is acquired, high pass adaptive and/or notch filtering can be used with one element of the filter from the red and infrared signals used to measure the arterial changes needed to compute SpO2 and the other element of the signal can be used to measure CVP changes.06-10-2010
20120226168DETECTING, ASSESSING AND MANAGING EXTREME SEIZURE EVENTS - Methods, system and apparatus for identifying an extreme epileptic state/event in a patient are provided. In one aspect, at least two seizure events are identified. At least one inter-seizure interval (ISI) value related to the at least two seizure events are determined. The ISI value is compared to at least one reference value. An occurrence of an extreme seizure event is determined based upon the comparison of the determined ISI value to the at least one reference value. In another aspect, a first seizure event is detected. At least one body index affected by the first seizure event is determined. A second seizure event is detected. An occurrence of an extreme seizure event is determined based at least in part in response to a determination that the second seizure event occurred prior to the body index value returning to a reference value.09-06-2012
20120259233AMBULATORY PHYSIOLOGICAL MONITORING WITH REMOTE ANALYSIS - Applicants have disclosed a wireless method for remotely monitoring the physiological status of ambulatory patients by using at least one “cloud” server. Physiological data, including ECG data, is collected by a device worn by a patient and then wirelessly transmitted (e.g., via a cell phone) to the server(s). Remote processing of electrocardiograms (“ECG”) is achieved, in part, by data streaming packet lengths acquired over no less than 3 seconds—3 seconds is typically equivalent to about 3 cardiac cycles (heartbeats)—to provide the quickest response time by clinicians to try to save a heart patient's life. Other types of physiological data are monitored by the device, so medical help can be obtained when needed. In this manner, any sudden onset of vicissitudes in a patient's well being may be detected and transmitted to the care-giver and patient in near real-time.10-11-2012
20120259234METHOD AND DEVICE FOR DETECTING INCIPIENT A-V NODE MALFUNCTION - The present invention generally relates to implantable stimulation devices, such as pacemakers, defibrillators, and cardioverters, and, in particular, to implantable medical devices using atrial based pacing such as an AAI pacing mode and methods for such implantable medical devices for detecting early stages of incipient A-V node malfunction as well as presence of A-V node malfunction. An AV conduction capacity is detected, wherein a sensed ventricular event following an intrinsic or paced atrial event during a predetermined period of time indicates good AV conduction capacity and wherein absence of a ventricular event within the predetermined period of time indicates poor AV conduction capacity. At least one A-V node function parameter indicating a function of the A-V node is determined, wherein the A-V node function parameter includes whether a status of the AV conduction capacity is good or poor. Incipient A-V node malfunction is detected where poor AV conduction capacity indicates incipient A-V node malfunction.10-11-2012
20100036264DEVICE FOR COLLECTING PHYSIOLOGICAL INFORMATION OF AN ANIMAL, AND CORRESPONDING METHOD - The device comprises:—a tight test enclosure (02-11-2010
20110004108SYSTEM AND METHOD FOR MONITORING CARDIAC OUTPUT - A method for monitoring cardiac output (pulmonary blood flow) of a subject, the method including: measuring a first net pulmonary uptake or elimination of a breathed gas species by the subject and a first partial pressure of the gas species at a first time, and at a second time later than the first time, determining a first pulmonary blood flow of the patient at the first time, and determining a pulmonary blood flow of the subject at the second time on the basis of the first pulmonary blood flow, the first net pulmonary uptake or elimination, the second net pulmonary uptake or elimination, the first partial pressure, and the second partial pressure.01-06-2011
20120265080NON-CONTACT SENSING OF PHYSIOLOGICAL SIGNALS - A non-contact monitoring system can include an electrode configured to detect electrical signals from a surface of a subject's body without directly contacting the surface of the subject's body (e.g., via capacitive coupling). The electrode can be positioned at a spaced apart distance from the subject's body (e.g., ranging up to about 30 cm). The signals from the electrodes can be processed in the analog and digital domain to determine one or more physiological conditions of a subject, such as drowsiness.10-18-2012
20120271177SV/CO TRENDING VIA INTRACARDIAC IMPEDANCE - A patient-specific model can show changes in cardiac stroke volume or cardiac output, such as to predict heart failure or to indicate cardiac remodeling. The patient-specific model can be derived from a surrogate indication of a cardiac stroke volume, such as a physical activity level, and features obtained from a thoracic impedance waveform, such as mean or peak-to-peak impedance values. In an example, several models corresponding to different patient physical activity levels can be determined.10-25-2012
20100228133System and Method for Generating a Trend Parameter Based on Respiration Rate Distribution - Systems and methods provide for assessing the heart failure status of a patient and, more particularly, to generating a trend parameter based on a distribution of the patient's respiration rate. Systems and methods provide for detecting, using an implantable device or a patient-external device, patient respiration and computing a respiration rate based on the detected patient respiration. A distribution of the respiration rate is calculated, and a trend parameter based on the respiration rate distribution is generated. The trend parameter is indicative of a patient's heart failure status. An output signal indicative of the patient's heart failure status may be generated based on the trend parameter.09-09-2010
20100234741SYSTEM AND METHOD FOR DETECTING SLEEPINESS - The present invention relates to a drowsiness detection method. A heartbeat signal and a breathing signal are detected by exploiting together a scheme and an optical system scheme. The detected signals are applied to respective amplification units, noise signals are eliminated from the detected signals, and noise-free signals are amplified. The amplified signals are applied to a central processing unit, signal processing is processed on the signals, and processed signals are combined. The combined signal is counted, and a warning sound, voice message or vibration is output in a case where a value, obtained by subtracting a counted output value monitored one minute before a current time, from a counted output value monitored two minutes before the current time, falls within a detection range and where, with a passage of time, the value falling within the detection range is successively detected from two to ten times.09-16-2010
20110263987RESPIRATION MEASUREMENT BY MEANS OF MORPHOLOGICAL OPERATORS - An implantable medical device that measures respiration parameters based on transthoracic impedance signals, and converts transthoracic impedance signals into a time series of digital values which is filtered with morphological operators to separate the signal into a respiratory component and a cardiac component. Metrics are generated based on the filtered impedance values such as respiratory rate, I/E ratio, tidal volume and minute ventilation.10-27-2011
20120089033BIOINFORMATION DETECTING DEVICE - A bioinformation detecting device 04-12-2012
20130184594Apparatus, Systems and Methods Analyzing Pressure and Volume Waveforms in the Vasculature - Apparatus, systems and methods are provided for analyzing relative compliance in the peripheral vasculature. Such apparatus, systems and methods generally involve generating a plethysmograph (PG) signal, generating one or more pressure waveforms and comparing the pressure waveform(s) relative to the PG signal to determine compliance indexes associated particular regions of the vasculature. A relative compliance ratio may also be determined by comparing arterial and venous relative compliance indexes. Apparatus, systems and methods are also provided for analyzing a PG waveform. Such apparatus, systems and methods generally involve generating a plethysmograph (PG) signal and comparing amplitude modulation of the PG signal relative to baseline modulation of the PG signal to estimate a relationship between left ventricular end diastolic pressure and stroke volume. The estimated relationship may account for a phase offset for the time between when changes in venous return affect left ventricular end diastolic pressure and stroke volume.07-18-2013
20120101394Personalized Fluid Assessment - A system and method of monitoring the fluid status of a patient. The system may include a patient monitor that receives blood pressure data. A first fluid model receives the blood pressure data, and a personalized fluid model is derived from the application of the blood pressure data to the first fluid model. An estimation of the patient's fluid status may be derived from the personalized fluid model. The method may include the steps of measuring a first blood pressure value, creating a personalized fluid model, measuring a second blood pressure value, applying the second blood pressure value to the personalized fluid model; and deriving an estimation of the fluid status of the patient.04-26-2012
20120101393 SYSTEM AND METHOD FOR DERIVING RESPIRATION FROM INTRACARDIAC ELECTROGRAMS (EGM) OR ECG SIGNALS - A method and apparatus for monitoring respiration in a patient sense a cardiac electrical signal and detect signal peaks from the cardiac electrical signal. A peak amplitude waveform is generated from the signal peaks. a first derivative of the peak amplitude waveform is computed. Inspiration pulses are derived from the first derivative signal, and a respiration metric can be computed using the inspiration pulses derived from the cardiac electrical signal.04-26-2012
20100228134METHOD, DEVICE AND COMPUTER PROGRAM PRODUCT FOR MONITORING THE PHYSIOLOGICAL STATE OF A PERSON - The invention relates to a method, device, and computer program product for monitoring the physiological state of a person. In the method, the heartbeat of the person is detected in order to obtain a pulse signal, and at least one parameter depicting the respiration of the person is determined in the time domain with the aid of time stamps made of the basis of the pulse signal. With the aid of the method, it is possible to calculate an estimate of the person's energy consumption during exercise, without complicated calculations or preliminary data based on measurements.09-09-2010
20100130873NON-CONTACT PHYSIOLOGIC MOTION SENSORS AND METHODS FOR USE - A radar-based physiological motion sensor is disclosed. Doppler-shifted signals can be extracted from the signals received by the sensor. The Doppler-shifted signals can be digitized and processed subsequently to extract information related to the cardiopulmonary motion in one or more subjects. The information can include respiratory rates, heart rates, waveforms due to respiratory and cardiac activity, direction of arrival, abnormal or paradoxical breathing, etc. In various embodiments, the extracted information can be displayed on a display.05-27-2010
20130172760PHOTOPLETHYSMOGRAPHY APPARATUS AND METHOD EMPLOYING HIGH RESOLUTION ESTIMATION OF TIME-FREQUENCY SPECTRA - A photoplethysmography apparatus and method is provided for high resolution estimating of Time-Frequency Spectra (TFS) and associated amplitudes using Variable Frequency Complex Demodulation (VFCDM), in a two-step procedure using a Time-Varying Optimal Parameter Search (TVOPS) technique to obtain TFS, followed by VFCDM to obtain even greater TFS resolution and instantaneous amplitudes associated with only specific frequencies of interest, via the combined TVOPS and VFCDM.07-04-2013
20130204145SYSTEM AND METHOD FOR MANAGING DEVICES AND DATA IN A MEDICAL ENVIRONMENT - A system and method for facilitating coordinated functioning of medical devices over a network. The system includes a communication circuit to receive an input indicative of an action to be performed by a first medical device from a processing unit coupled to a social health record data bank. The communication circuit is configured to send an instruction to the first medical device to initiate the action by the first medical device in association with information of a patient associated with the first medical device stored in and retrieved from the social health record data bank. The system further includes a control circuit configured to monitor the action performed by the first medical device and instruct the first medical device to pause performing the action for a defined period of time based on an instruction from the processing unit indicative of an action to be performed by a second medical device.08-08-2013
20130204146RESPIRATION INDUCING APPARATUS AND CONTROL METHOD THEREOF - A respiration inducing apparatus is provided, and includes a respiration waveform data collection unit for collecting respiration waveform data from a user; a storage unit for storing a respiration waveform template; a controller for comparing the respiration waveform data and the respiration waveform template and determining a respiration fidelity based on a similarity of a comparison result; and a user interface unit for displaying at least one of the respiration waveform data, the respiration waveform template, and the respiration fidelity.08-08-2013
20080221460Methodology and display instrument to noninvasively determine pulmonary characteristics through breath analysis and arterial blood measurement - Disclosed are a method for determining respiratory characteristics of lung-pulmonary circulation system by respiratory blood gas and blood gas data, and a displaying instrument for the same. More particularly, the present invention describes a method for determining respiratory characteristics of the lung-pulmonary circulation system by using respiratory blood gas and blood gas data and a display instrument for the same, so that the present invention provides partial O09-11-2008
20080221459RESPIRATORY-BASED CONTROL OF MEDICAL PROCEDURE - A medical system (09-11-2008
20130096442MEDICAL EVENT LOGBOOK SYSTEM AND METHOD - An event-based approach to collecting and organizing information associated with events affecting respiration is presented. The detection or prediction of an event affecting the respiration of a patient initiates acquisition of information associated with the event. The respiratory logbook system acquires information associated with the event during the event and during intervals proximate in time to the event. The information is organized as a respiratory log entry. The user can access the information by operating a user interface. The information may be presented in textual or graphical form.04-18-2013
20130096441DETECTING, QUANTIFYING, AND/OR CLASSIFYING SEIZURES USING MULTIMODAL DATA - Methods, systems, and apparatus for detecting an epileptic event, for example, a seizure in a patient using a medical device. The determination is performed by providing an autonomic signal indicative of the patient's autonomic activity; providing a neurologic signal indicative of the patient's neurological activity; and detecting an epileptic event based upon the autonomic signal and the neurologic signal.04-18-2013
20130102908Air Conduction Sensor and a System and a Method for Monitoring a Health Condition - According to embodiments of the present invention, an air conduction sensor for detecting a sound from a user is provided. The air conduction sensor includes a housing comprising an opening, wherein a rim of the opening is configured to at least substantially attach to a skin or a clothing of the user; a microphone coupled to the housing such that there is an air gap between the microphone and the skin or the clothing, and wherein the microphone is configured to detect the sound. A system and a method for monitoring a health condition of a user are also provided.04-25-2013
20130131522APNEA TYPE DETERMINING APPARATUS AND METHOD - An apnea classification system provides for apnea monitoring and differentiation based on several sleep apnea related parameters for diagnostic and therapeutic purposes. Monitoring of such sleep apnea related parameters allows the apnea classification system to differentiate among the different types of apnea and hypopnea and to identify an occurrence of periodic respiration. This information may then be used to determine the best method of therapy, or adjust current therapy parameters to more effectively treat a subject.05-23-2013
20100286534METHODS AND SYSTEMS FOR ASSESSING METABOLIC TRANSITION POINTS - The invention relates to methods and systems for determining one or more metabolic transition points in a subject during a work task. The methods and systems comprise determining the respiration rate (RR) and heart rate (HR) in the subject that is undergoing a work task and calculating the ratio of RR/HR at more than one time point during the work task. The metabolic transition points are identifiable points in time of the RR/HR ratio in the subject that is undergoing a work task.11-11-2010
20100286533Biosignal-detecting apparatus and method thereof - A method of detecting a biosignal includes; measuring a biosignal from a user; band pass filtering the biosignal to each of a first frequency band and/or a second frequency band, and detecting a first frequency band signal and/or a second frequency band signal; calculating a PSD of the first frequency band signal and detecting a frequency band signal with a maximum PSD in the first frequency band as a heartbeat signal of the user; and calculating a PSD of the second frequency band signal and/or detecting a frequency band signal with a maximum PSD in the second frequency band as a respiration signal of the user.11-11-2010
20110237959INDICATOR FOR FLUID RESUSCITATION - A system for providing an indication of cardiovascular function, includes a respiration input (09-29-2011
20130150734INTUITIVE PRESENTATION OF VENTILATION EFFECTIVENESS - Ventilation information may be presented. Output signals may be received that convey information related to one or more breathing parameters of a subject receiving assisted or controlled mechanical ventilation. Based at least in part on the received output signals, volumetric components of a tidal volume of the subject may be determined. The volumetric components may include an alveolar dead space, an effective alveolar tidal volume, and/or other volumetric components. The alveolar dead space is the volume of inspired gas that occupies alveoli but does not take part in oxygen exchange in the lungs of the subject. The effective alveolar tidal volume is the volume of inspired gas that takes part in oxygen exchange in the lungs of the subject. A visual representation that textually or graphically represents the tidal volume, and/or textually or graphically represents the volumetric components separately from each other may be presented via a user interface.06-13-2013
20120283579SYSTEM AND METHOD FOR RECONSTRUCTING CARDIAC ACTIVATION INFORMATION - An example system and method of reconstructing biological activation information are disclosed. A first biological signal and a second biological signal associated with an organ are processed via a computing device to determine whether there is a point of change in a derivative of the first biological signal with respect to a derivative of the second biological signal above a threshold. An activation onset time is assigned in the first biological signal at the point of change to define biological activation associated with the organ in the first cardiac signal if it is determined that the point of change is above the threshold.11-08-2012
20130158416ADVANCED PATIENT MANAGEMENT FOR DEFINING, IDENTIFYING AND USING PREDETERMINED HEALTH-RELATED EVENTS - Systems, devices and methods for defining, identifying and using health-related significant events are disclosed. One aspect is a programmable device having machine executable instructions for performing a method to assist with managing a patient's health. In various embodiments, at least one previously-defined event is detected based on a number of acquired health-related parameters. The at least one detected event is recorded with an associated time when the at least one detected significant event occurred. An action is triggered based on the at least one detected event. The at least one detected event is displayed with at least one trended health-related parameter in a single display area. Other aspects and embodiments are provided herein.06-20-2013
20130190632AUTOREGULATION MONITORING - A method may include controlling a ventilator to introduce mean airway pressure (MAP) variations in a patient to induce slow waves of substantially fixed amplitude and period to the patient. The method may also include analyzing arterial blood pressure in the patient with respect to the MAP variations and determining, based on the analyzing, whether an autoregulatory mechanism associated with the patient's brain is operating properly.07-25-2013
20130190631APPARATUS FOR DETECTING RESPIRATORY SINUS ARRHYTHMIA - At least one embodiment of the invention relates to an implantable electronic device, comprising a heart rhythm detection unit, a respiratory dynamics detection unit, an evaluation unit and at least one connection to at least two electrode poles. The at least two electrode poles are connected to the heart rhythm detection unit, and the heart rhythm detection unit is configured to supply a heart rhythm signal representing the heart rhythm as an output signal. The at least two electrode poles are connected to a respiratory dynamics determination unit, and the respiratory dynamics detection unit is configured to supply a respiratory dynamics signal representing the respiratory dynamics as the output signal. Moreover, the heart rhythm detection unit and the respiratory dynamics detection unit are connected to the evaluation unit, and the evaluation unit is configured to evaluate the heart rhythm signal in conjunction a temporally associated respective respiratory dynamics signals.07-25-2013
20120029362APNEA TYPE DETERMINING APPARATUS AND METHOD - An apnea classification system provides for apnea monitoring and differentiation based on several sleep apnea related parameters for diagnostic and therapeutic purposes. Monitoring of such sleep apnea related parameters allows the apnea classification system to differentiate among the different types of apnea and hypopnea and to identify an occurrence of periodic respiration. This information may then be used to determine the best method of therapy, or adjust current therapy parameters to more effectively treat a subject.02-02-2012
20120029361SYSTEMS AND METHODS FOR DETERMINING RESPIRATORY EFFORT - Systems and methods for calculating a measure of respiratory effort of a subject are provided. The measure of respiratory effort may be calculated based on a differential pulse transit time (DPTT) calculated for received photoplethysmograph signals. The systems and methods may allow for the calculation of respiratory effort in absolute units, and without the need for calibrations from a device that measures blood pressure (e.g., a non-invasive blood pressure cuff).02-02-2012
20130197376Detecting and treatment of sleep apnea - A device is presented for evaluating whether an episode of sleep apnea is occurring in a patient suffering from chronic sleep apnea disorder, for delivery of appropriate therapy. The device includes circuitry adapted to respond to a cardiac signal generated by the heart. Switching circuitry diverts passage of the heart signal through both a high impedance path and a substantially lower impedance path, and a differential amplifier processes the resulting signal pairs to ascertain the difference in magnitude between the two signals of each pair. An analyzer thereof determines changes in the patient's ventilation, from which inordinately reduced patient ventilation is detected to assess possible occurrence of an episode of sleep apnea. If the analyzer denotes change of ventilation between otherwise regular respiratory cycles, an actual episode of sleep apnea is indicated. A stimulus generator responds to such indication to generate an appropriate electrical therapy for delivery to a preselected location in the patient's body to induce ventilation so as to terminate the apnea episode.08-01-2013
20130197375Hydraulic Bed Sensor and System for Non-Invasive Monitoring of Physiological Data - Disclosed herein is a new and improved non-invasive bed sensing system for detecting and monitoring physiological movements such as heartbeat and respiration. The system may employ a hydraulic fluid to transduce the physiological pressures to an integrated pressure sensor and a new and improved signal processing method to identify individual cardiac pulses from the electronic signals generated by the hydraulic transducer. The system provides increased sensitivity capable of capturing quantitative pulse and respiration rates with subtle changes, ability to distinguish between instances of low pulse rate and shallow breathing, and improved comfort over existing system.08-01-2013
20130211266DIFFERENTIATING DECOMPENSATION DETECTION BASED ON CO-MORBIDITIES IN HEART FAILURE - This document discusses, among other things, a system comprising a sensor signal processor configured to receive a plurality of electrical sensor signals produced by a plurality of sensors and at least one sensor signal produced by an implantable sensor, a memory that includes information indicating a co-morbidity of a subject, a sensor signal selection circuit that selects a sensor signal to monitor from among the plurality of sensor signals, according to an indicated co-morbidity, a threshold adjustment circuit that adjusts a detection threshold of the selected sensor signal according to the indicated co-morbidity, and a decision circuit that applies the adjusted detection threshold to the selected sensor signal to determine whether an event associated with worsening heart failure (HF) occurred in the subject and outputs an indication of whether the event associated with worsening HF occurred to a user or process.08-15-2013

Patent applications in class Detecting respiratory condition