PNEUMATIC TRANSIENT HANDLER AND METHOD

• US 20110284002A1
• Filed: 05/17/2011
• Published: 11/24/2011
• Est. Priority Date: 05/18/2010
• Status: Abandoned Application

• Current Assignee: Shenzhen Mindray Bio-Medical Electronics Co., Ltd. (Excelsior Union Ltd.)
• Original Assignee: Mindray Medical Sweden AB (Getinge AB)
• Inventors: Cewers, Göran
• Application Number:
  US13/109,605
• Publication Number:
  US 20110284002A1
• Time in Patent Office: Days
• US Class Current: 128/204.21
• CPC Class Codes: A61M 16/0057 Pumps therefor
• CPC Class Codes: A61M 16/0081 Bag or bellow in a bottle
• CPC Class Codes: A61M 16/0833 T- or Y-type connectors, e.g. Y-piece
• CPC Class Codes: A61M 2016/0021 with a proportional output signal, e.g. from a thermistor
• CPC Class Codes: A61M 2205/0294 Piezoelectric materials

Abstract

A method and device for handling transient pressures and flow processes in a breathing system is disclosed.

Claims

1. A pneumatic transient handler unit for connection to a breathing system to control pressure within the breathing system, comprising:

at least one actuator element;

at least one container with an outlet channel; and

at least one pressure sensor;

wherein a motion of the actuator element compresses or decompresses the container depending on the pressure measured by the pressure sensor, and

wherein the outlet channel of the container is connected to the breathing system, whereby the pneumatic transient handler unit compensates for undesired pressure variations in the breathing system.

2. The transient handler unit according to claim 1, wherein the pneumatic transient handler is arranged and controlled to contribute to maintain a desired pressure profile in the breathing system.

3. The transient handler unit according to claim 1, wherein the pneumatic transient handler is configured for stand alone operation with pressure compensation based on predetermined criteria.

4. The transient handler unit according to claim 1, wherein the actuator element comprises at least one piezo actuator.

5. The transient handler unit according to claim 4, wherein a mechanical motion amplifier is serially coupled to the actuator element.

6. The transient handler unit according to claim 1, wherein said container comprises a bellows.

7. The transient handler unit according to claim 6, wherein the actuator element is arranged to bring a disk in motion for changing a volume of said bellows.

8. A method of controlling or compensating for transient pressures and flow processes in a breathing system, the method comprising:

providing a pneumatic transient handler unit coupled to a breathing system;

controlling a motion of said actuator unit in a pressure control loop using at least one pressure sensor; and

generating a flow into and out of said pneumatic transient handler unit for generating a desired pressure profile in the breathing system.

9. The method according to claim 8, wherein said pneumatic transient handler unit is arranged close to a patient who is connected to said breathing system.