Patent application number | Description | Published |
20090205663 | CONFIGURING THE OPERATION OF AN ALTERNATING PRESSURE VENTILATION MODE - Systems and methods for configuring the operation of an alternating pressure ventilation mode are provided. According to one embodiment a configuration method includes monitoring gas flow between a patient and a ventilation system. Based on the monitoring, a peak expiratory flow rate (PEFR) is determined Information indicative of values of parameters of the ventilation mode are received, including a higher pressure setting, a lower pressure setting and a duration of the higher pressure setting. User input is also received indicative of a target percentage of PEFR at which the ventilation system should cycle from the lower pressure setting to the higher pressure setting. Based on the target percentage, a duration of the lower pressure setting is programmatically determined. Finally, the ventilation system is configured to automatically cycle between the higher and lower pressure setting at a predetermined flow based on the parameters and the duration of the lower pressure setting. | 08-20-2009 |
20090241953 | VENTILATOR WITH PISTON-CYLINDER AND BUFFER VOLUME - A mechanical ventilator is provided with a piston-cylinder for performing an air displacement function and a buffer volume and associated output valve for providing an air metering function. The piston-cylinder may comprise a reciprocating arrangement, in which compressed air is supplied to the buffer volume with each stroke of the piston. | 10-01-2009 |
20090241956 | METHOD FOR CONTROLLING DELIVERY OF BREATHING GAS TO A PATIENT USING MULTIPLE VENTILATION PARAMETERS - The disclosure provides a method for controlling the delivery of a breathing gas to a patient. The method may include regulating the fractional inspired oxygen (FiO | 10-01-2009 |
20100069761 | Method 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 |
20100288283 | DYNAMIC ADJUSTMENT OF TUBE COMPENSATION FACTOR BASED ON INTERNAL CHANGES IN BREATHING TUBE - This disclosure describes systems and methods for adjusting a determination of the amount of breathing assistance a patient requires while on a ventilator. In general, in determining the amount of breathing assistance required, the ventilator takes into account an airflow resistance attributable to the tube used to deliver ventilation to the patient's lungs. A tube compensation factor is calculated using a tube compensation algorithm, or similar equation. In particular, the tube compensation factor represents the resistance to airflow attributable to the breathing tube itself based on, inter alia, frictional drag, turbulence, and an internal diameter of the tube. Changes in the tube during ventilation impact the calculation of the breathing assistance required by the patient and are accounted for when compensating for the breathing tube. | 11-18-2010 |
20110213215 | Spontaneous Breathing Trial Manager - This disclosure describes systems and methods for conducting and terminating spontaneous breathing trials on patients receiving mechanical ventilation. The disclosure describes a novel spontaneous breathing trial manager for a medical ventilator with rapid initiation and continuous monitoring of a patient's tolerance of the spontaneous breathing trial and displaying of that tolerance as a function of time, which provides for bedside adjustment of the spontaneous breathing trial parameters and automatic termination of a spontaneous breathing trial based on a time interval expiration or poor patient tolerance of the SBT. | 09-01-2011 |
20130158370 | SPONTANEOUS BREATHING TRIAL MANAGER - This disclosure describes systems and methods for conducting and terminating spontaneous breathing trials on patients receiving mechanical ventilation. The disclosure describes a novel spontaneous breathing trial manager for a medical ventilator with rapid initiation and continuous monitoring of a patient's tolerance of the spontaneous breathing trial and displaying of that tolerance as a function of time, which provides for bedside adjustment of the spontaneous breathing trial parameters and automatic termination of a spontaneous breathing trial based on a time interval expiration or poor patient tolerance of the SBT. | 06-20-2013 |
20130338514 | METHOD FOR DETERMINING HEMODYNAMIC EFFECTS - 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. | 12-19-2013 |