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FLOW RATE COMPENSATION FOR TRANSIENT THERMAL RESPONSE OF HOT-WIRE ANEMOMETERS

  • US 20100218765A1
  • Filed: 02/27/2009
  • Published: 09/02/2010
  • Est. Priority Date: 02/27/2009
  • Status: Active Grant
First Claim
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1. A method comprising:

  • one or more flow sensor processing modules of a medical ventilator receiving an output signal of an exhalation flow sensor including a hot-wire anemometer, the output signal indicative of a rate of flow of expired gas by a patient;

    the one or more flow sensor processing modules compensating for transient thermal response of the hot-wire anemometer resulting from a change in concentration of gas types included within the expired gas by applying a corrective modification to the output signal or a value based thereon that is based at least in part on a fraction of inspired oxygen (FiO2) being supplied to the patient by the medical ventilator; and

    wherein the one or more flow sensor processing modules are implemented in one or more microprocessors and one or more computer-readable media, the one or more computer-readable media having instructions tangibly embodied therein that are executable by the one or more microprocessors.

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