Respiratory assistance apparatus

Patent metadata

Field	Value
Publication number	US-11701483-B2
Application number	US-202016774544-A
Country	US
Kind code	B2
Filing date	Jan 28, 2020
Priority date	Aug 23, 2012
Publication date	Jul 18, 2023
Grant date	Jul 18, 2023

Abstract

A respiratory assistance apparatus includes a conduit connecting a flow generator and an outlet. The conduit includes a venture formation. The apparatus further includes an oxygen inlet in fluid communication or selective fluid communication with an oxygen outlet. The oxygen outlet is directed into the conduit and toward a mouth of the venture formation. The flow generator provides a flow path for air to enter the conduit when the flow generator is not operating.

First claim

The invention claimed is:

1. A respiratory assistance apparatus comprising:
a flow generator;
a conduit connected to the flow generator, the conduit comprising:
a venturi formation positioned downstream of the flow generator; and
an outlet,

a first oxygen inlet in fluid communication or selective fluid communication with an oxygen supply, the first oxygen inlet directed into the conduit and directed toward a mouth of the venturi formation; and
an integrated humidifier comprising a chamber, the chamber comprising an inlet and an outlet, wherein the inlet of the humidifier is connected to the outlet of the conduit;
wherein the flow generator is configured to operate in a first mode and a second mode;
wherein, in the first mode, the flow generator is operational and pumps air through a flow path through the flow generator to the conduit; and
wherein, in the second mode, the flow generator is deactivated and offers the flow path for air to enter the conduit when drawn in from a pressure drop caused by oxygen flowing into the venturi formation.

2. The respiratory assistance apparatus of claim 1 , wherein the first oxygen inlet is configured to direct a jet of oxygen toward the center of the venturi formation.

3. The respiratory assistance apparatus of claim 1 , further comprising a second oxygen inlet configured to direct oxygen into the conduit.

4. The respiratory assistance apparatus of claim 3 , wherein the second oxygen inlet is provided upstream of the venturi formation but is not oriented to direct flow directly towards the mouth of the venturi formation.

5. The respiratory assistance apparatus of claim 3 , wherein the second oxygen inlet is directed into the conduit at a throat of the venturi formation.

6. The respiratory assistance apparatus of claim 1 , further comprising an adjustable flow controller disposed between the oxygen supply and the first oxygen inlet.

7. The respiratory assistance apparatus of claim 1 , further comprising one or more sensors.

8. The respiratory assistance apparatus of claim 7 , wherein measurements from the one or more sensors are communicated to a remote monitoring station.

9. The respiratory assistance apparatus of claim 7 , further comprising a controller in communication with the one or more sensors.

10. The respiratory assistance apparatus of claim 7 , further comprising a display unit configured to show measurements from the one or more sensors.

11. The respiratory assistance apparatus of claim 7 , further comprising a portable power source configured to provide power to the one or more sensors.

12. The respiratory assistance apparatus of claim 1 , further comprising a portable power source.

13. The respiratory assistance apparatus of claim 12 , wherein when a mains power is interrupted and the respiratory assistance apparatus is powered by the portable power source, a humidity and/or a temperature of gas at the outlet of the chamber is dropped to a lower level.

14. The respiratory assistance apparatus of claim 12 , wherein when a mains power is interrupted and the respiratory assistance apparatus is powered by the portable power source, power provided to a heating element of the respiratory assistance apparatus is reduced or disabled.

15. The respiratory assistance apparatus of claim 12 , wherein the portable power source provides power to a display unit.

16. The respiratory assistance apparatus of claim 12 , wherein the portable power source provides power to the humidifier and/or the flow generator.

17. The respiratory assistance apparatus of claim 1 , wherein the respiratory assistance apparatus is configured to generate an alert when the respiratory assistance apparatus is disconnected from a main power source or the flow generator ceases operation.

18. The respiratory assistance apparatus of claim 1 , wherein the respiratory assistance apparatus is configured to generate an alert when the flow generator unexpectedly ceases operation.

19. The respiratory assistance apparatus of claim 1 , wherein when the flow generator is not operating, the flow generator provides a flow path for air to enter the conduit.

Assignees

• Fisher & Paykel Healthcare Ltd

Inventors

• Smith Malcolm David

Classifications

• A61M16/0066 Primary

  Blowers or centrifugal pumps · CPC title

• A61M16/0003

  Accessories therefor, e.g. sensors, vibrators, negative pressure · CPC title

• A61M16/0012

  by Venturi means · CPC title

• A61M16/0666

  Nasal cannulas or tubing (devices for improving normal breathing through the nose A61F5/08; nose filters A62B23/06; outside holding devices A61M25/02) · CPC title

• A61M16/109

  the humidifying liquid or the beneficial agent · CPC title