Pressure Support System with Automatic Comfort Feature Modification

• US 20080202528A1
• Filed: 02/08/2008
• Published: 08/28/2008
• Est. Priority Date: 02/12/2007
• Status: Active Grant

• Current Assignee: Philips RS North America LLC (Koninklijke Philips N.V.)
• Original Assignee: RIC INVESTMENTS LLC (Respironics Incorporated)
• Inventors: Hill, Peter D., Matthews, Greg, Paul, Zachary, Carter, Duane H., Dixon, Tim, DeGuilio, Andrew, Shelly, Benjamin I., Jonczak, Daniel A.
• Granted Patent: US 8,789,527 B2
• Time in Patent Office: Days
• US Class Current: 128/204.23
• CPC Class Codes: A61M 16/0051 with alarm devices
• CPC Class Codes: A61M 16/0063 Compressors
• CPC Class Codes: A61M 16/026 specially adapted for predicting, e.g. for determining an information representative of a flow limitation during a ventilation cycle by using a root square technique or a regression analysis
• CPC Class Codes: A61M 2016/0027 pressure meter
• CPC Class Codes: A61M 2016/0036 in the breathing tube and used in both inspiratory and expiratory phase
• CPC Class Codes: A61M 2205/50 with microprocessors or computers

Abstract

A pressure support system that delivers a flow of gas to a patient'"'"'s airway via a pressure generating system and a patient circuit. A controller receives a treatment set point from an input source and determines an adjusted treatment set point based on the treatment set point and a comfort feature function, which in one embodiment, is not based on a physiological condition of such a patient. In another embodiment, the controller provides a respiratory treatment therapy during a therapy session based on the treatment set point and the comfort feature, which is modified automatically during a therapy session without user intervention based on a comparison of the treatment set point to a treatment set point variable. The controller controls the operation of the pressure generating system based on the adjusted treatment set point or the combination of the treatment set point and the comfort feature.

Claims

1. A pressure support system comprising:

a pressure generating system adapted to generate a pressurized flow of gas;

a patient circuit coupled to the pressure generating system and adapted to communicate the flow of gas to an airway of a patient;

a controller operatively coupled to the pressure generating system, wherein the controller receives a treatment set point from an input source and is programmed to determine an adjusted treatment set point based on the treatment set point and a comfort feature function, wherein the comfort feature function is not based on a physiological condition of such a patient, and wherein the controller controls the operation of the pressure generating system based on the adjusted treatment set point.

2. The system of claim 1, wherein the controller determines the adjusted treatment set point a plurality of times during a respiratory cycle or wherein the controller determines the adjusted treatment during each processing cycle of the controller.

3. The system of claim 1, wherein the treatment set point corresponds to a CPAP level, an IPAP level, an EPAP level, a pressure support level, a peak pressure, a peak volume, a peak flow, a PEEP level, an average pressure, an average volume, an average flow, an inspiration duration, or an expiration duration.

4. The system of claim 1, wherein the treatment set point (a) is set manually and does not change during a therapy session, or (b) is determined by an auto-adjusting algorithm.

5. The system of claim 1, wherein the comfort feature function is a function of the treatment set point, the rate of the flow of gas, the pressure of the flow of gas, time, a pressure support level, or hardware associated with the pressure support system.

6. The system of claim 1, wherein the controller determines the adjusted treatment set point using a look up table, a neural network, fuzzy logic, or a mathematical formula.

7. The system of claim 1, wherein the comfort feature function introduces a comfort feature to the treatment set point to determine the adjusted treatment set point, wherein the comfort feature includes a change in at least one of:

pressure, flow, pressure support, or rise rate from a previous treatment set point.

8. The system of claim 1, wherein the comfort feature function changes during a therapy session based on the treatment set point, the rate of the flow of gas, the pressure of the flow of gas, time, pressure support, or hardware associated with the pressure support system.

9. The system of claim 1, wherein the controller receives a plurality of treatment set points from one or more input sources, and wherein the controller determines one or more adjusted treatment set points based on one or more comfort feature functions, wherein the comfort feature functions are not based on a physiological condition of such a patient, and wherein the controller controls the operation of the pressure generating system based on the one or more adjusted treatment set points.

10. A pressure support system comprising:

a pressure generating system adapted to generate a pressurized flow of gas;

a patient circuit coupled to the pressure generating system and adapted to communicate the flow of gas to an airway of a patient;

a controller operatively coupled to the pressure generating system, wherein the controller receives a treatment set point from an input source and is programmed to provide a respiratory treatment therapy during a therapy session based on the treatment set point and a comfort feature, wherein the comfort feature is added, deleted, or changed automatically during a therapy session without user intervention based on a comparison of the treatment set point to a treatment set point variable, and wherein the controller controls the operation of the pressure generating system to provide the respiratory treatment therapy during such a therapy session.

11. The system of claim 10, wherein the controller adds, deletes, or changes the comfort feature to be used in to determine the respiratory treatment therapy (a) a plurality of times during a respiratory cycle, or (b) during each processing cycle of the controller.

12. The system of claim 10, wherein the treatment set point corresponds to a CPAP level, an IPAP level, an EPAP level, a pressure support level, a peak pressure, a peak volume, a peak flow, a PEEP level, an average pressure, an average volume, an average flow, an inspiration duration, or an expiration duration.

13. The system of claim 10, wherein the treatment set point is (a) set manually and does not change during a therapy session, or (b) determined by an auto-adjusting algorithm.

14. The system of claim 10, wherein the controller determines the respiratory treatment therapy based on the treatment set point and the comfort feature using a look up table, a neural network, fuzzy logic, or a mathematical formula.

15. The system of claim 10, wherein the comfort features includes a change in at least one of:

pressure, flow, pressure support, or rise rate.

16. The system of claim 10, wherein the controller changes the comfort feature to be used with the treatment set point to determine the respiratory treatment therapy during a therapy session based on the treatment set point, the rate of the flow of gas, the pressure of the flow of gas, time, pressure support, or hardware associated with the pressure support system.

17. The system of claim 10, wherein the controller receives a plurality of treatment set points from one or more input sources, and wherein the controller determines one or more respiratory treatment therapies based the plurality of treatment set points and one or more comfort features, and wherein the controller controls the operation of the pressure generating system based on the one or more respiratory treatment therapies.

18. The system of claim 10, wherein the treatment set point variable includes a pressure related variable, a pressure support level, a flow related variable, or a time-based variable.

19. A pressure support system comprising:

a pressure generating system adapted to generate a pressurized flow of gas;

a patient circuit coupled to the pressure generating system and adapted to communicate the flow of gas to an airway of a patient;

a controller operatively coupled to the pressure generating system, wherein the controller receives a treatment set point from an input source and is programmed to provide a respiratory treatment therapy during a therapy session based on the treatment set point and a comfort feature, wherein the comfort feature is added, deleted, or changed automatically during a therapy session without user intervention based on a comfort feature function that is not based on a physiological condition of such a patient, and wherein the controller controls the operation of the pressure generating system to provide the respiratory treatment therapy during such a therapy session.

20. The system of claim 19, wherein the controller adds, deletes, or changes the comfort feature to be used in to determine the respiratory treatment therapy (a) a plurality of times during a respiratory cycle, or (b) during each processing cycle of the controller.

21. The system of claim 19, wherein the treatment set point corresponds to CPAP level, an IPAP level, an EPAP level, a pressure support level, a peak pressure, a peak volume, a peak flow, a PEEP level, an average pressure, an average volume, an average flow, an inspiration duration, or an expiration duration.

22. The system of claim 19, wherein the treatment set point (a) is set manually and does not change during a therapy session, or (b) is determined by an auto-adjusting algorithm.

23. The system of claim 19, wherein the comfort feature function is a function of the treatment set point, the rate of the flow of gas, the pressure of the flow of gas, time, pressure support, or hardware associated with the pressure support system.

24. The system of claim 19, wherein the controller determines the respiratory treatment therapy using a look up table, a neural network, fuzzy logic, or a mathematical formula.

25. The system of claim 19, wherein the comfort feature is a change in at least one of:

pressure, flow, pressure support, or rise rate.

26. The system of claim 19, wherein the controller changes the comfort feature, the comfort feature function, or both during a therapy session or during each processing cycle of the controller based on the treatment set point, the rate of the flow of gas, the pressure of the flow of gas, time, pressure support, or hardware associated with the pressure support system.

27. The system of claim 19, wherein the controller receives a plurality of treatment set points from one or more input sources, and wherein the controller determines one or more respiratory treatment therapies based the plurality of treatment set points and one or more comfort features, and wherein the controller controls the operation of the pressure generating system based on the one or more respiratory treatment therapies.

28. A pressure support system comprising:

a pressure generating system adapted to generate a pressurized flow of gas;

a patient circuit coupled to the pressure generating system and adapted to communicate the flow of gas to an airway of a patient;

a controller operatively coupled to the pressure generating system, wherein the controller receives a treatment set point from an input source and is programmed to provide a respiratory treatment therapy during a therapy session based on the treatment set point and an expiratory pressure relief, wherein the expiratory pressure relief is added, deleted, or changed automatically during a therapy session without user intervention, and wherein the controller controls the operation of the pressure generating system to provide the respiratory treatment therapy during such a therapy session.

29. The system of claim 28, wherein the controller adds, deletes, or changes the expiratory pressure relief (a) a plurality of time during a respiratory cycle, or (b) during each processing cycle of the controller.

30. The system of claim 28, wherein the treatment set point corresponds to a CPAP level, an IPAP level, an EPAP level, a pressure support level, a peak pressure, a peak volume, a peak flow, a PEEP level, an average pressure, an average volume, an average flow, an inspiration duration, or an expiration duration.

31. The system of claim 28, wherein the treatment set point (a) is set manually and does not change during a therapy session, or (b) is determined by an auto-adjusting algorithm.

32. The system of claim 28, wherein the controller determines the respiratory treatment therapy using a look up table, a neural network, fuzzy logic, or a mathematical formula.

33. The system of claim 28, wherein the expiratory pressure relief is based on a flow rate, a pressure, or both of the flow of gas.

34. The system of claim 28, wherein the controller receives a plurality of treatment set points from one or more input sources, and wherein the controller determines one or more respiratory treatment therapies based the plurality of treatment set points and one or more expiratory pressure reliefs, and wherein the controller controls the operation of the pressure generating system based on the one or more respiratory treatment therapies.