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Breathing gas delivery method and apparatus

  • US 5,803,065 A
  • Filed: 01/18/1996
  • Issued: 09/08/1998
  • Est. Priority Date: 09/22/1989
  • Status: Expired due to Term
First Claim
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1. A method of determining a leak component of gas flow in a respiratory gas supply system for supplying respiratory gas to a patient, comprising the steps of:

  • determining a beginning and an end of a plurality of patient breaths, each breath comprised of an inspiratory phase and an expiratory phase;

    integrating patient respiratory gas flow rate throughout said plurality of patient breaths to determine a total respiratory gas volume for said plurality of patient breaths; and

    dividing said total respiratory gas volume for said plurality of patient breaths by a time duration of said plurality of patient breaths to determine a leakage rate for said plurality of patient breaths.

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