Discreet respiratory therapy system

Patent metadata

Field	Value
Publication number	US-9669172-B2
Application number	US-201313934596-A
Country	US
Kind code	B2
Filing date	Jul 3, 2013
Priority date	Jul 5, 2012
Publication date	Jun 6, 2017
Grant date	Jun 6, 2017

Abstract

A device provides respiratory treatment such as for sleep disordered breathing and other respiratory conditions in a discreet configuration to provide a minimally invasive system. The system may include a flow pressurizer apparatus configured to generate a pressurized flow of air through a fine bore delivery conduit toward a patient interface. The system may further include a treatment compensator coupled with the fine bore delivery conduit. The treatment compensator may be configured at the patient interface to reduce pressure for patient inspiration. A processor may control adjustments to the pressure generated by the flow pressurizer apparatus.

First claim

The invention claimed is:

1. A respiratory treatment system comprising:
a flow pressurizer apparatus configured to generate a pressurized flow of air through a fine bore delivery conduit toward a patient interface;
a treatment compensator coupled with the fine bore delivery conduit at the patient interface and configured to reduce a first pressure from the fine bore delivery conduit to a second pressure for delivery to a patient from the treatment compensator, the second pressure being above atmospheric pressure; and
a processor configured to control adjustments to the first pressure generated by the flow pressurizer apparatus,
wherein the flow pressurizer apparatus comprises a first flow generator and second flow generator, each flow generator comprising a motor with impeller and volute, wherein the first flow generator is configured to generate a fixed pressure to overcome pressure drop introduced by the fine bore delivery conduit, and wherein the second flow generator is configured to dynamically generate treatment pressure to different levels of pressurization above the fixed pressure.

2. The respiratory treatment system of claim 1 wherein the second flow generator comprises a controller to control operation of the second flow generator and to control operation of the first flow generator.

3. The respiratory treatment system of claim 2 wherein the first flow generator is coupled with the second flow generator by a large bore delivery conduit.

4. The respiratory treatment system of claim 1 further comprising a Venturi chamber coupled to the patient interface, the Venturi chamber configured to entrain atmospheric air proximate to a nozzle coupled with an output of the fine bore delivery conduit.

5. The respiratory treatment system of claim 4 further comprising a foam filter configured at an entrainment inlet of the Venturi chamber.

6. The respiratory treatment system of claim 1 wherein the treatment compensator comprises a pressure step-down chamber including a shuttle configured to move to reduce the first pressure at an input to the step-down chamber to the second pressure at an output of the step-down chamber, the shuttle activated by an air feed-back passage.

7. The respiratory treatment system of claim 1 wherein the treatment compensator comprises a stint valve configured to selectively reduce a flexible passage of the treatment compensator to reduce the first pressure for patient inspiration.

8. The respiratory treatment system of claim 7 wherein the stint valve comprises a solenoid actuator controlled by the processor as a function of a measure of pressure from a pressure sensor located proximate to an output of the stint valve.

9. The respiratory treatment system of claim 7 wherein the stint valve comprises an actuation lever.

10. The respiratory treatment system of claim 9 wherein the lever is configured proximate to a pressure feedback chamber having a membrane, the membrane being configured to move the lever with changing pressure of the pressure feedback chamber.

11. The respiratory treatment system of claim 7 wherein the stint valve comprises first and second pressure activation chambers adjacent to first and second membranes of the flexible passage, the first pressure activation chamber comprising a feed-forward pressure chamber in gas communication with an input side of the flexible passage, the second pressure activation chamber comprising a feedback pressure chamber in gas communication with an output side of the flexible passage.

12. The respiratory treatment system of claim 11 wherein the first pressure activation chamber includes a release vent having a release vent gate.

13. The respiratory treatment system of claim 1 further comprising a gas source input configured to couple with a supplemental oxygen gas source, the input to direct the supplemental oxygen to mix with the pressurized air.

14. The respiratory treatment system of claim 1 where the treatment compensator is configured to deliver the reduced second pressure above atmospheric pressure to the patient interface during patient inspiration.

15. A respiratory treatment system of claim 1 wherein the treatment compensator includes a shuttle.

16. A method for control of a respiratory treatment apparatus, the method comprising:
producing with a flow pressurizer system a flow of air through a fine bore delivery conduit toward a patient interface at a first pressure above atmospheric pressure;
compensating at the patient interface with a treatment compensator to reduce the first pressure to a second pressure for delivery to a patient from the treatment compensator, the second pressure being above atmospheric pressure; and
with a processor, controlling adjustments to the first pressure generated by the flow pressurizer system,
wherein the flow pressurizer system comprises a first flow generator and second flow generator, each flow generator comprising a motor with impeller and volute, wherein the first flow generator is configured to generate a fixed pressure to overcome pressure drop introduced by the fine bore delivery conduit, and wherein the second flow generator is configured to dynamically generate treatment pressure to different levels of pressurization above the fixed pressure.

17. The method of claim 16 wherein the a controller of the second flow generator controls operation of the second flow generator and the first flow generator.

18. The method of claim 17 wherein the second flow generator is coupled with the first flow generator by a large bore delivery conduit.

19. The method of claim 16 further comprising entraining atmospheric air with a Venturi chamber coupled to the patient interface, the entraining proximate to a nozzle coupled with an output of the fine bore delivery conduit.

20. The method of claim 19 wherein the entraining is performed through a foam filter configured at an entrainment inlet of the Venturi chamber.

21. The method of claim 16 wherein the treatment compensator comprises a pressure step-down chamber including a shuttle moving to reduce the first pressure at an input to the step-down chamber to the second pressure at an output of the step-down chamber, the shuttle activated by an air feed-back passage.

22. The method of claim 16 wherein the treatment compensator comprises a stint valve that selectively reduces a flexible passage of the treatment compensator to reduce the first pressure for patient inspiration.

23. The method of claim 22 wherein the stint valve comprises a solenoid actuator controlled by the processor as a function of a measure of pressure from a pressure sensor located proximate to an output of the stint valve.

24. The method of claim 22 wherein the stint valve comprises an actuation lever.

25. The method of claim 24 wherein the lever is configured proximate to a pressure feedback chamber having a membrane, the membrane flexing to move the lever with changing pressure of the pressure feedback chamber.

26. The method of claim 22 wherein the stint valve comprises first and second pressure activation chambers adjacent to first and second membranes of the flexible passage, the first pressure activation chamber comprising a feed-forward pressure chamber in gas communication with an input side of the flexible passage, the second pressure activation chamber comprising a feedback pressure chamber in gas communication with an output side of the flexible passage.

Assignees

• Resmed Ltd

Inventors

• Cullen Christopher Samuel
• Mazzone Damien Julian
• Dantanarayana Muditha Pradeep
• Gupta Tumul
• Formica Justin John
• Davidson Aaron Samuel

Classifications

• A61M2016/0039

  in the inspiratory circuit · CPC title

• A61M16/209

  Relief valves · CPC title

• A61M16/204

  used for inhalation control · CPC title

• A61M2205/3553

  remote, e.g. between patient's home and doctor's office · CPC title

• A61M16/0057

  Pumps therefor · CPC title