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System and method for providing a breathing gas

  • US 8,066,004 B2
  • Filed: 11/23/2009
  • Issued: 11/29/2011
  • Est. Priority Date: 06/23/2003
  • Status: Active Grant
First Claim
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1. A system for providing a breathing gas comprising:

  • a flow path adapted to receive a patient interface;

    a blower in fluidic communication with the flow path;

    a variable position valve in fluidic communication with the flow path;

    a pressure sensor disposed to detect a pressure associated with delivery of breathing gas to the patient interface; and

    a controller in operative communication with the pressure sensor, blower, and variable position valve, wherein the controller controls the variable position valve to provide the breathing gas;

    i) at a first breathing gas pressure during a first portion of a patient breathing cycle, ii) at a second breathing gas pressure during a second portion of the patient breathing cycle, and iii) at the first breathing gas pressure during a third portion of the patient breathing cycle.

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