Discreet respiratory therapy system

• US 10,065,008 B2
• Filed: 07/05/2013
• Issued: 09/04/2018
• Est. Priority Date: 07/05/2012
• Status: Active Grant

• Current Assignee: ResMed Pty Ltd. (ResMed Incorporated)
• Original Assignee: Resmed Limited (ResMed Incorporated)
• Inventors: Cullen, Christopher Samuel, Mazzone, Damien Julian, Dantanarayana, Muditha Pradeep, Gupta, Tumul, Debono, Joseph, Sims, Andrew, Formica, Justin John, Davidson, Aaron Samuel, Jennings, Jeffrey Dean, Reed, David Alan
• Primary Examiner(s): Ho, Jackie Tan-Uyen T
• Assistant Examiner(s): Boecker, Joseph D
• Application Number:
  US14/412,113
• Publication Number:
  US 20150335851A1
• Time in Patent Office: 1,887 Days
• Field of Search: 12820418, 12820421, 12820424, 12820425, 12820426, 12820524, 12820525, 13751611-51623
• CPC Class Codes: A61M 16/0057 Pumps therefor
• CPC Class Codes: A61M 16/0063 Compressors
• CPC Class Codes: A61M 16/0066 Blowers or centrifugal pumps
• CPC Class Codes: A61M 16/0069 the speed thereof being controlled by respiratory parameters, e.g. by inhalation
• 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 16/06 Respiratory or anaesthetic masks
• CPC Class Codes: A61M 16/0683 Holding devices therefor
• CPC Class Codes: A61M 16/0816 Joints or connectors
• CPC Class Codes: A61M 16/0866 Passive resistors therefor
• CPC Class Codes: A61M 16/0875 Connecting tubes
• CPC Class Codes: A61M 16/1005 with O2 features or with parameter measurement
• CPC Class Codes: A61M 16/1055 bacterial
• CPC Class Codes: A61M 16/107 in the inspiratory path
• CPC Class Codes: A61M 16/109 the humidifying liquid or the beneficial agent
• CPC Class Codes: A61M 16/127 by Venturi effect, i.e. entrainment mixers
• CPC Class Codes: A61M 16/16 Devices to humidify the respiration air A61M16/1045 takes precedence
• CPC Class Codes: A61M 16/20 Valves specially adapted to medical respiratory devices
• CPC Class Codes: A61M 16/201 Controlled valves
• CPC Class Codes: A61M 16/203 Proportional
• CPC Class Codes: A61M 16/204 used for inhalation control
• CPC Class Codes: A61M 16/207 : Membrane valves with pneumatic amplification stage, i.e. having master and slave membranes
• CPC Class Codes: A61M 16/209 : Relief valves
• CPC Class Codes: A61M 2016/0021 : with a proportional output signal, e.g. from a thermistor
• CPC Class Codes: A61M 2016/0027 : pressure meter
• CPC Class Codes: A61M 2016/0039 : in the inspiratory circuit
• CPC Class Codes: A61M 2205/21 : insensitive to tilting or inclination, e.g. spill-over prevention
• CPC Class Codes: A61M 2205/3344 : Measuring or controlling pressure at the body treatment site
• CPC Class Codes: A61M 2205/3355 : Controlling downstream pump pressure
• CPC Class Codes: A61M 2205/3553 : remote, e.g. between patient's home and doctor's office
• CPC Class Codes: A61M 2205/3561 : local, e.g. within room or hospital
• CPC Class Codes: A61M 2205/3584 : using modem, internet or bluetooth
• CPC Class Codes: A61M 2205/3592 : using telemetric means, e.g. radio or optical transmission
• CPC Class Codes: A61M 2205/50 : with microprocessors or computers
• CPC Class Codes: A61M 2205/502 : User interfaces, e.g. screens or keyboards
• CPC Class Codes: A61M 2205/75 : with filters

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 small 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.

Claims

1. A respiratory treatment apparatus 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 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 or the second pressure of the treatment compensator,

wherein the treatment compensator further comprises a step down surface with a set of orifices between a high pressure inlet chamber, coupled with the fine bore delivery conduit, and a low pressure outlet chamber, coupled with the patient interface,

wherein the treatment compensator further comprises a seal to selectively open and close the set of orifices,

wherein each of the set of orifices comprises a respective boss raised above the step down surface.

2. The respiratory treatment apparatus of claim 1 wherein the treatment compensator comprises a proportional valve.

3. The respiratory treatment apparatus of claim 2 wherein the proportional valve comprises a high pressure inlet chamber coupled with the fine bore delivery conduit and a low pressure outlet chamber coupled with the patient interface, the high pressure inlet chamber for the first pressure and the low pressure outlet chamber for the second pressure.

4. The respiratory treatment apparatus of claim 2 wherein the treatment compensator includes a solenoid.

5. The respiratory treatment apparatus of claim 2 wherein the treatment compensator includes a pressure sensor, the sensor configured to sense the second pressure reduced by the treatment compensator.

6. The respiratory treatment apparatus of claim 2 wherein the treatment compensator includes an actuator to adjust the proportional valve, and wherein the treatment compensator includes a pressure sensor.

7. The respiratory treatment apparatus of claim 2 wherein the processor is configured to control an actuator to adjust the proportional valve so as to control a measure of the second pressure from a pressure sensor of the treatment compensator to meet a target pressure.

8. The respiratory treatment apparatus of claim 6 wherein the treatment compensator includes a controller with the processor.

9. The respiratory treatment apparatus of claim 8 wherein the controller includes an output driver for the actuator and an error evaluation unit to generate an error signal for the processor based on a signal representing a measure of pressure from the pressure sensor and a signal representing a target pressure.

10. The respiratory treatment apparatus of claim 9 wherein the controller further includes a pressure signal processor.

11. The respiratory treatment apparatus of claim 1 wherein the treatment compensator further includes a relief valve to release pressure of the treatment compensator to atmosphere.

12. The respiratory treatment apparatus of claim 11 wherein a controller of the treatment compensator sets an operation of the relief valve in response to a detected pressure.

13. The respiratory treatment apparatus of claim 1 wherein the flow pressurizer apparatus comprises a first stage blower and second stage blower, an outlet of the first stage blower being coupled with an inlet of the second stage blower and an outlet of the second stage blower coupled with the fine bore delivery conduit.

14. The respiratory treatment apparatus of claim 13 wherein the flow pressurizer apparatus further comprises a bypass conduit coupling the outlet of the second stage blower with an inlet of the first stage blower, the bypass conduit coupled with a flow diverter to selectively permit flow through the bypass conduit.

15. The respiratory treatment apparatus of claim 1 wherein movement of the seal is controlled by the processor to satisfy a target pressure.

16. The respiratory treatment apparatus of claim 1 wherein the step down surface further includes a plurality of channels about a periphery of the step down surface.

17. The respiratory treatment apparatus of claim 1 further comprising a pressure tank reservoir coupled with the fine bore delivery conduit proximate to the flow pressurizer apparatus, the reservoir configured to pressurize the air of the fine bore delivery conduit during peak operations and charge from it during low flow operations.

18. The respiratory treatment apparatus of claim 17 further comprising a pressure regulator to limit pressure entering the fine bore delivery conduit from the reservoir.

19. The respiratory treatment apparatus of claim 18 further comprising a secondary pressure reservoir proximate to the treatment compensator.

20. The respiratory treatment apparatus of claim 1 wherein the flow pressurizer apparatus is configured to generate air pressures in a range of about 70 cm H₂O to 140 cm H₂O.

21. The respiratory treatment apparatus of claim 1 wherein the treatment compensator is configured to reduce pressures to a range of about 2-40 cm H₂O.

22. The respiratory treatment apparatus of claim 1 wherein the fine bore delivery conduit is a delivery tube with an outside diameter in a range of about 7 mm to 10 mm.

23. The respiratory treatment apparatus of claim 1 wherein the patient interface comprises a mask with a vent.

24. The respiratory treatment apparatus of claim 1 wherein the processor is configured to control adjustments to the first pressure generated by the flow pressurizer apparatus and the reduction of pressure at the treatment compensator.

25. The respiratory treatment apparatus of claim 1 wherein the processor is configured to control adjustments to the reduction of pressure at the treatment compensator.

26. The respiratory treatment apparatus of claim 1 wherein the processor is configured to control adjustments to the first pressure generated by the flow pressurizer apparatus.

27. A respiratory treatment apparatus 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 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 or the second pressure of the treatment compensator,

wherein the treatment compensator further comprises a step down surface with a set of orifices between a high pressure inlet chamber, coupled with the fine bore delivery conduit, and a low pressure outlet chamber, coupled with the patient interface,

wherein the treatment compensator further comprises a seal to selectively open and close the set of orifices,

wherein the step down surface further includes a plurality of channels about a periphery of the step down surface.