APPARATUS FOR DELIVERY OF PRESSURISED GAS

• US 20090301482A1
• Filed: 10/16/2006
• Published: 12/10/2009
• Est. Priority Date: 10/21/2005
• Status: Active Grant

• Current Assignee: Compumedics Medical Innovation Pty Limited
• Original Assignee: Compumedics Limited
• Inventors: Freeman, Warwick, Blochlinger, Fred, Parratt, Grant, Wallace, Allan, Burton, David
• Granted Patent: US 8,985,105 B2
• Time in Patent Office: Days
• US Class Current: 128/203.120
• CPC Class Codes: A61M 16/0051 with alarm devices
• CPC Class Codes: A61M 16/0069 the speed thereof being controlled by respiratory parameters, e.g. by inhalation
• CPC Class Codes: A61M 16/024 including calculation means, e.g. using a processor
• CPC Class Codes: A61M 16/0816 Joints or connectors
• CPC Class Codes: A61M 16/10 Preparation of respiratory gases or vapours
• CPC Class Codes: A61M 16/107 in the inspiratory path
• CPC Class Codes: A61M 16/1075 by influencing the temperature A61M16/1045 takes precedence
• CPC Class Codes: A61M 16/109 the humidifying liquid or the beneficial agent
• CPC Class Codes: A61M 16/16 Devices to humidify the respiration air A61M16/1045 takes precedence
• CPC Class Codes: A61M 16/161 with means for measuring the humidity
• CPC Class Codes: A61M 2016/0027 pressure meter
• CPC Class Codes: A61M 2016/0039 in the inspiratory circuit
• CPC Class Codes: A61M 2205/42 Reducing noise
• CPC Class Codes: A61M 2205/505 Touch-screens; Virtual keyboard or keypads; Virtual buttons; Soft keys; Mouse touches
• CPC Class Codes: A61M 2209/086 Docking stations

Abstract

The present invention provides a gas delivery device and system and methods for delivering humidified pressurised gas through a conduit to a subject. The configuration of the elements of the gas delivery device enable the device to be conveniently oriented from a horizontal to vertical position to suit the needs of a user. The gas delivery device may incorporate a Helmholtz resonator for dampening sound of the motor. The conduit may incorporate concentric tubes to allow it to conveniently engage the humidifier at a single aperture. The invention includes a method of operating a blower motor for a gas delivery device using a single Hall sensor.

Claims

1. An apparatus for delivering breathable gas to a subject, comprising:

a blower for delivering pressurised gas;

a water reservoir for humidifying the gas;

a heater;

a casing for housing the blower and the water reservoir;

a gas inlet and a gas outlet engaging a single port in the water reservoir; and

a conduit for directing gas from the outlet to a subject.

5. The apparatus according to claim 1, wherein the conduit comprises concentric conduits for gas inflow and gas outflow.

6. The apparatus according to claim 5 wherein the gas inflow conduit comprises an inner conduit.

7. The apparatus of claim 1, wherein the apparatus is disposable for operation at any suitable angle from substantially horizontal to substantially upright without spillage of fluid from the water reservoir.

22. The apparatus according to claim 1, wherein the gas inlet and gas outlet engage a single aperture in the water reservoir.

23. The apparatus of claim 1, further comprising a gas filter housed in a removable transparent casing.

24. The apparatus of claim 1, further comprising a lid for engaging sealingly with the water reservoir.

2. An apparatus for delivering breathable gas to a subject, comprising:

a blower for delivering pressurised gas, the blower disposed in a sound housing;

a casing for housing the blower and a water reservoir;

a heater for heating water in the water reservoir;

a gas inlet and a gas outlet;

a gas filter housed in a removable transparent casing; and

a conduit for directing gas from the outlet to a subject.

25. The apparatus according to claim 2, wherein the conduit comprises concentric conduits for gas inflow and gas outflow.

26. The apparatus according to claim 25, wherein the gas inflow conduit comprises an inner conduit.

27. The apparatus of claim 2, wherein the apparatus is disposable for operation at any suitable angle from substantially horizontal to substantially upright without spillage of fluid from the water reservoir.

28. The apparatus according to claim 2, wherein the gas inlet and gas outlet engage a single aperture in the water reservoir.

29. The apparatus of claim 2, wherein the sound housing operates as a Helmholtz resonator.

3. An apparatus for delivering breathable gas to a subject, comprising:

a blower for delivering pressurised gas;

a casing for housing the blower;

a gas inlet and a gas outlet,

a conduit for directing gas from the outlet to a subject, and

at least one plenum chamber and at least one resonating means adjacent the blower.

4. The apparatus of claim 3, further comprising a water reservoir and a heater for heating water in the water reservoir.

30. The apparatus according to claim 3, wherein the conduit comprises concentric conduits for gas inflow and gas outflow.

31. The apparatus according to claim 30, wherein the gas inflow conduit comprises an inner conduit.

32. The apparatus of claim 3, wherein the apparatus is disposable for operation at any suitable angle from substantially horizontal to substantially upright without spillage of fluid from the water reservoir.

33. The apparatus of claim 3, further comprising a gas filter housed in a removable transparent casing.

34. The apparatus of claim 3, wherein the at least one plenum chamber operates as a Helmholtz resonator.

35. The apparatus according to claim 4, wherein the gas inlet and gas outlet engage a single aperture in the water reservoir.

8. An apparatus for delivering breathable gas to a subject comprising:

a blower for delivering pressurised gas;

a water reservoir for humidifying the gas;

a heater;

a casing for housing the blower and the water reservoir;

a gas inlet and a gas outlet; and

a conduit for directing gas from the outlet to a subject

wherein the apparatus is disposable in operation at any suitable angle from substantially horizontal to substantially upright orientations without spillage of fluid from the water reservoir.

9. The apparatus of claim 8, wherein the gas inlet and gas outlet engage a single aperture in the water reservoir.

10. The apparatus according to claim 9, wherein the conduit comprises concentric conduits for gas inflow and gas outflow.

11. The apparatus according to claim 10 wherein the gas inflow tube comprises the inner conduit.

13. The apparatus of claim 8, further comprising a gas filter housed in a removable transparent casing.

14. The apparatus of claim 8, further comprising a lid for engaging sealingly with the water reservoir.

12. (canceled)

15. An apparatus for delivering breathable gas to a subject comprising:

a blower having an outlet for delivering pressurised gas, the blower comprising of a motor chamber, two outlet airways and a valve chamber, the blower including means to rapidly change gas pressure or flow rate;

a casing for housing the blower and the water reservoir;

a gas inlet and a gas outlet;

a gas filter housed in a removable transparent casing; and

a conduit for directing gas from the outlet to a subject.

16. The apparatus of claim 15 wherein the means to change the gas pressure or flow rate is at least one impeller.

17. The apparatus of claim 16, further comprising a time signalling means.

18. A method for controlling a motor of a blower in a gas delivery device, the method including the steps of:

determining the rotational position of an impeller;

determining the velocity of an impeller; and

adjusting the timing of winding excitations for controlling the speed of the impeller.

19. A method for delivering breathable gas to a subject, the method including the steps of:

pressurising ambient gas with an impeller,

humidifying the ambient gas; and

directing the humidified gas to the airway of a subject;

wherein the pressurising step includes detecting the position of the impeller with a single sensor means.

20. The method of claim 19 wherein the single sensor means is a Hall effect sensor.

21. (canceled)