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Determination of leak and respiratory airflow

  • US 6,279,569 B1
  • Filed: 03/14/2000
  • Issued: 08/28/2001
  • Est. Priority Date: 08/14/1996
  • Status: Expired due to Term
First Claim
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1. A method for determining the instantaneous leak flow from a face mask comprising the steps of:

  • (a) determining pairs of values for pressure in the mask and airflow through the mask;

    (b) calculating the conductance of a leak as a function of pairs of values for pressure and airflow that are determined over a time interval that exceeds a normal breath; and

    (c) calculating the instantaneous leak flow as a function of the calculated leak conductance and an instantaneous determined value of mask pressure.

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