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Method and apparatus for detection of a respiratory waveform

  • US 5,546,952 A
  • Filed: 09/21/1994
  • Issued: 08/20/1996
  • Est. Priority Date: 09/21/1994
  • Status: Expired due to Term
First Claim
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1. A method for determining the validity of a respiratory effort waveform from a signal having non-respiratory artifacts comprising the steps of:

  • (a) monitoring a respiratory effort waveform of the patient for at least one time parameter of the waveform characteristic of a non-respiratory artifact; and

    (b) comparing the parameter value with a predetermined limit having as a lower limit a fixed time period and as an upper limit a time period calculated from a baseline average of the parameter, the valid respiratory waveform indicated by the parameter value being between the upper limit and lower limit.

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