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Method and apparatus for determining instantaneous inspired volume of a subject during ventilatory assistance

  • US 7,137,389 B2
  • Filed: 03/15/2004
  • Issued: 11/21/2006
  • Est. Priority Date: 09/23/1996
  • Status: Expired due to Fees
First Claim
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1. A method for determining an instantaneous inspired volume of a subject during ventilatory assistance for use in a ventilator device comprising the steps of:

  • determining a measure of respiratory airflow of the patient;

    calculating an index equal to the fuzzy extent to which a leak is changing based at least in part on the measure of respiratory airflow; and

    calculating instantaneous inspired volume as a function of both the measure of respiratory airflow and said index.

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