Pneumatic system for controlled oxygen delivery

Patent metadata

Field	Value
Publication number	US-10953189-B2
Application number	US-201815874105-A
Country	US
Kind code	B2
Filing date	Jan 18, 2018
Priority date	Jan 20, 2017
Publication date	Mar 23, 2021
Grant date	Mar 23, 2021

Abstract

A pneumatic system for delivering oxygen to a subject, including an oxygen supply channel having an inlet, a patient delivery outlet and an exhaust; and a flow control element configured to control the flow from the oxygen inlet to the patient delivery outlet, or to the exhaust; wherein inhalation by the patient causes the flow control element to assume a first position, allowing oxygen to flow from the oxygen inlet to the patient delivery outlet; and wherein exhalation by the patient causes the flow control element to assume a second position, directing oxygen flow from the oxygen inlet to the exhaust.

First claim

The invention claimed is:

1. A pneumatic system for delivering oxygen to a patient, the system comprising:
an oxygen supply channel comprising an inlet, a patient delivery outlet and an exhaust;
a flow control element configured to control the flow from the inlet to said patient delivery outlet or to the exhaust, wherein inhalation by the patient causes the flow control element to assume a first position to allow oxygen to flow from the inlet to the patient delivery outlet and wherein exhalation by the patient causes the flow control element to assume a second position to direct oxygen flow from the inlet to the exhaust;
a pneumatic chamber, comprising a nozzle wherein inhalation by the patient reduces a pressure within the pneumatic chamber to a first pressure value and wherein exhalation by the patient increases the pressure within the pneumatic chamber to a second pressure value, wherein the second pressure value is larger than the first pressure value; and
a sliding cap configured to slide between a first position and a second position, wherein a gap between the sliding cap and the nozzle of the pneumatic chamber is larger in the first position than in the second position.

2. The pneumatic system of claim 1 , wherein the flow control element comprises a piston.

3. The pneumatic system of claim 1 , wherein the system is configured for connection to an oxygen delivery mask.

4. The pneumatic system of claim 1 , wherein when the pressure within the pneumatic chamber reaches the second pressure value, the flow control element is pushed into the second position.

5. The pneumatic system of claim 1 , wherein inhalation by the patient causes the sliding cap to be sucked into the first position, thereby increasing the gap, thus reducing the pressure within the pneumatic chamber.

6. The pneumatic system of claim 1 , wherein oxygen is supplied at a flow rate above 10 LPM.

7. The pneumatic system of claim 1 , comprising a control unit configured to detect the position of the flow control element and to provide a signal indicative of the position.

8. An oxygen delivery system comprising:
an oxygen delivery mask; and
a pneumatic system configured to control delivering oxygen to the oxygen delivery mask, the pneumatic system comprising:
an oxygen supply channel comprising an inlet, a patient delivery outlet in fluid flow communication with the oxygen delivery mask, and an exhaust; and
a flow control element configured to control the flow from the oxygen inlet to the patient delivery outlet or to the exhaust;
a pneumatic chamber, comprising a nozzle wherein inhalation by the patient reduces a pressure within the pneumatic chamber to a first pressure value and wherein exhalation by the patient increases the pressure within the pneumatic chamber to a second pressure value, wherein the second pressure value is larger than the first pressure value; and
a sliding cap configured to slide between a first position and a second position, wherein a gap between the sliding cap and the nozzle of the pneumatic chamber is larger in the first position than in the second position;
wherein inhalation by the patient causes the flow control element to assume a first position allowing oxygen to flow from the inlet to the patient delivery outlet and to the oxygen delivery mask; and
wherein exhalation by the patient causes the flow control element to assume a second position directing oxygen flow from the inlet to the exhaust, thereby substantially preventing the oxygen flow from reaching the oxygen delivery mask.

9. The oxygen delivery system of claim 8 , wherein the flow control element comprises a piston.

10. The oxygen delivery system of claim 8 , wherein when the pressure within the pneumatic chamber reaches the second pressure value, the flow control element is pushed into the second position.

11. The oxygen delivery system of claim 8 , wherein inhalation by the patient causes the sliding cap to be sucked into the first position, thereby increasing the gap, thus reducing the pressure within the pneumatic chamber.

12. The oxygen delivery system of claim 8 , wherein oxygen is supplied at a flow rate above 10 LPM.

13. The oxygen delivery system of claim 8 , comprising a control unit configured to detect the position of the flow control element and to provide a signal indicative of the position to a breath monitor.

14. The oxygen delivery system of claim 8 , comprising a capnograph.

Assignees

• Oridion Medical 1987 Ltd

Inventors

• Kertser Michael

Classifications

• A61M16/1005

  with O2 features or with parameter measurement · CPC title

• A61M2016/103

  the CO2 concentration · CPC title

• A61M16/207 Primary

  Membrane valves with pneumatic amplification stage, i.e. having leader and follower membranes · CPC title

• A61M2202/0208

  Oxygen · CPC title

• A61M16/0672

  Nasal cannula assemblies for oxygen therapy · CPC title