Automatic slope adjustment for bi-levelpressure support system
AssigneeRespironics, Inc.
InventorGregory Yurko
Life of this patent
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Abstract
An apparatus and method for a bi-level positive airway pressure support in which the rise time from the expiratory positive airway pressure to the inspiratory positive airway pressure is automatically controlled by the pressure support system. The pressure support system includes a sensor, a control system, and a pressure generating system. The sensor monitors the patient's respiration to detect respiratory events, such as an apnea, hyponea or other disturbance, and the control system responds to the sensor information to adjust the rise time from the expiratory positive airway pressure to the inspiratory positive airway pressure gas pressure to maximize patient comfort and pressure support treatment effectiveness.
Claims18
A pressure support system comprising:
- a pressure generating system adapted to produce a flow of breathing gas at an inspiratory positive airway pressure (IPAP) level and an expiratory positive airway pressure (EPAP) level that is less than the IPAP level;
- a conduit operatively coupled to the pressure generating system to deliver the flow of breathing gas to an airway of a patient;
- a sensor adapted to detect a physiological condition associated with such a patient receiving the flow of breathing gas;
- and
- a processor receiving an output of the sensor and providing a control signal to the pressure generating system, wherein the processor is programmed to control the pressure generating system so as to:
- a) deliver the flow of breathing gas to such a patient at the IPAP level during at least a portion of an inspiratory phase of such a patient, and to deliver the flow of breathing gas to such a patient at the EPAP level during at least a portion of an expiratory phase of such a patient, and
- b) automatically adjust a slope of a transition of pressure from the EPAP level to the IPAP level based on the output of the sensor.
A pressure support system comprising:
- pressure generating means for producing a flow of breathing gas at an inspiratory positive airway pressure (IPAP) level and an expiratory positive airway pressure (EPAP) level that is less than the IPAP level;
- sensing means for detecting a physiological condition associated with a patient receiving the flow of breathing gas;
- and
- controlling means, operatively connected to the sensing means and the pressure generating means, for:
- a) determining a slope of a transition of pressure from the EPAP level to the IPAP level based on an output of the sensing means,
- b) causing the pressure generating means to deliver the flow of breathing gas to such a patient at the IPAP level during at least a portion of an inspiratory phase of such a patient, and to deliver the flow of breathing gas to such a patient at the EPAP level during at least a portion of an expiratory phase of such a patient, and
- c) controlling a rate of change from the EPEP level to the IPAP level over the plurality of respiratory cycles based on the slope.
A method for automatically adjusting a slope of a pressure change in a pressure support system, comprising:
- producing a flow of breathing gas at an inspiratory positive airway pressure (IPAP) level and an expiratory positive airway pressure (EPAP) level that is less than the inspiratory positive airway pressure;
- detecting a physiological condition associated with a patient receiving the flow of breathing gas;
- determining a slope of a transition of pressure from the EPAP level to the IPAP level based on the physiological condition associated with such a patient;
- delivering the flow of breathing gas to such a patient at the IPAP level during at least a portion of an inspiratory phase of such a patient, and delivering the flow of breathing gas to such a patient at the EPAP level during at least a portion of an expiratory phase of such a patient;
- and
- controlling a rate of change from the EPAP level to the IPAP level based on the slope.
Dependencies are inferred from the claim text.