Pressure support method with automatic comfort feature modification

• US 8,789,528 B2
• Filed: 02/08/2008
• Issued: 07/29/2014
• 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: Carter, Duane H., Dixon, Tim, Jonczak, Daniel A., Paul, Zachary, Shelly, Benjamin I., Matthews, Greg, Hill, Peter D., DeGuilio, Andrew
• Primary Examiner(s): MATTER, KRISTEN CLARETTE
• Application Number:
  US12/028,306
• Publication Number:
  US 20080216832A1
• Time in Patent Office: 2,363 Days
• Field of Search: 128/204.18, 128/204.21, 128/204.23
• US Class Current: 128/204.21
• 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 method of delivering 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 method of providing a respiratory treatment therapy to a patient, comprising:

generating a pressurized flow of gas;

communicating the pressurized flow of gas to an airway of a patient;

receiving a treatment set point in accordance with a therapy mode, wherein the therapy mode spans at least one or more respiratory cycles,

determining an adjusted treatment set point based on the received treatment set point and a comfort feature function, wherein activation of the comfort feature function results in the adjusted treatment set point being implemented in place of the received treatment set point, wherein activation of the comfort feature function is based on one or more of time spent in the therapy mode, and/or time elapsed since activation of the pressurized flow of gas; and

controlling the flow of gas based on the adjusted treatment set point for at least one complete respiratory cycle responsive to the comfort feature function being activated.

2. The method of claim 1, wherein determining the adjusted treatment set point is done a plurality of time during the at least one complete respiratory cycle or a previous respiratory cycle.

3. The method 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 method of claim 1, further comprising the step of changing the treatment set point during a therapy session manually or by means of an auto-adjusting algorithm.

5. The method of claim 1, wherein activation of the comfort feature function is further based on one or more of ambient humidity and/or altitude associated with communicating the pressurized flow of gas.

6. The method of claim 1, wherein activation of the comfort feature function based on time spent in the therapy mode is based on one or more hours of time spent in the therapy mode.

7. The method 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 an adjustment in at least one of:

pressure, peak pressure, flow, peak flow, volume, peak volume, or rise rate from the received treatment set point.

8. The method of claim 1, wherein activation of the comfort feature function is performed gradually over a course of one or more months of respiratory therapy.

9. The method of claim 1, wherein the therapy mode corresponds to a bi-level pressure support, wherein receiving a treatment set point includes receiving a plurality of treatment set points, wherein determining the adjusted treatment set point includes determining a plurality of adjusted treatment set points based on the received plurality of treatment set points from one or more input sources and one or more comfort feature functions, wherein individual activations of the one or more comfort feature functions correspond to individual ones of the plurality of adjusted treatment set points being different from the corresponding individual ones of the received plurality of treatment set points, wherein individual activations of the one or more comfort feature functions are based on one or more of time spent in the therapy mode, and/or time elapsed since activation of the pressurized flow of gas.

10. A method of providing a respiratory treatment therapy to a patient, comprising:

generating a pressurized flow of gas with a pressure generating system;

communicating the pressurized flow of gas to an airway of a patient;

receiving a treatment set point in accordance with a therapy mode, wherein the therapy mode spans at least one or more respiratory cycles; and

controlling the pressure generating system to provide the therapy mode during a therapy session based on the received treatment set point and a comfort feature, wherein the comfort feature is added, deleted, or changed

automatically during a therapy session without user intervention, wherein activation of the comfort feature results in a reduction of a pressure of the pressurized flow of gas being implemented in place of the received treatment set point in at least one phase of respiration, wherein activation of the comfort feature is based on one or more of ambient humidity and/or altitude associated with the pressure generating system, and wherein controlling the pressure generating system is performed for at least one complete respiratory cycle responsive to the comfort feature being activated.

11. The method of claim 10, wherein adding, deleting, or changing the comfort feature is done a plurality of times during the at least one complete respiratory cycle or a previous respiratory cycle.

12. The method 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 method of claim 10, further comprising the step of changing the treatment set point during a therapy session manually or by means of an auto-adjusting algorithm.

14. The method of claim 10, wherein activation of the comfort feature is performed gradually over a course of one or more months of respiratory therapy.

15. The method of claim 10, wherein the comfort features includes an adjustment in at least one of:

pressure, peak pressure, flow, peak flow, volume, peak volume, or rise rate from the received treatment set point.

16. The method of claim 10, wherein activation of the comfort feature is further based on a humidifier being associated with the pressure support system.

17. The method of claim 10, wherein activation of the comfort feature is further based on one or more of time spent in the therapy mode, and/or time elapsed since activation of the pressurized flow of gas.

18. The method of claim 10, wherein activation of the comfort feature is further based on a predetermined period that has elapsed since a previous activation of the comfort feature such that subsequent activations of the comfort feature are at least the predetermined period apart, wherein the predetermined period is at least one or more hours.

19. A method of providing a respiratory treatment therapy to a patient, comprising:

generating a pressurized flow of gas with a pressure generating system;

communicating the pressurized flow of gas to an airway of a patient;

receiving a treatment set point in accordance with a therapy mode, wherein the therapy mode spans at least one or more respiratory cycles; and

controlling the pressure generating system to provide the therapy mode during a therapy session based on the received treatment set point and a comfort feature, wherein the comfort feature is added, deleted, or changed

automatically during a therapy session without user intervention, wherein activation of the comfort feature results in a reduction of a pressure of the pressurized flow of gas being implemented in place of the received treatment set point in at least one phase of respiration, wherein the comfort feature is based on a comfort feature function, wherein activation of the comfort feature function is based on one or more of patient circuit type, patient interface type, and/or filter type associated with the pressure generating system, and wherein controlling the pressure generating system is performed for at least one complete respiratory cycle responsive to the comfort feature function being activated.

20. The method of claim 19, wherein adding, deleting, or changing the comfort feature is done a plurality of times during the at least one complete respiratory cycle or a previous respiratory cycle.

21. The method 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 method of claim 19, further comprising the step of changing the treatment set point during a therapy session manually or by means of an auto-adjusting algorithm.

23. The method of claim 19, wherein activation of the comfort feature function is furthermore based on one or more of ambient humidity and/or altitude associated with communicating the pressurized flow of gas.

24. The method of claim 19, wherein activation of the comfort feature is performed gradually over a course of one or more months of respiratory therapy.

25. The method of claim 19, wherein the comfort feature is an adjustment in at least one of:

pressure, peak pressure, flow, peak flow, volume, peak volume, or rise rate from the received treatment set point.

26. The method of claim 19, wherein activation of the comfort feature is further based on the one or more of time spent in the therapy mode, and/or time elapsed since communicating the pressurized flow of gas.

27. The method of claim 26, wherein activation of the comfort feature is based on time spent in the therapy mode is based on one or more hours of time spent in the therapy mode.