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SIGNAL PROCESSING FOR PULSE OXIMETRY

  • US 20110270059A1
  • Filed: 07/13/2011
  • Published: 11/03/2011
  • Est. Priority Date: 09/30/2005
  • Status: Abandoned Application
First Claim
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1. A method of determining the pulse rate of a living subject from a pulse oximetry input signal, the method comprising the steps of:

  • comparing the input signal at each of a plurality of different time shifts to each member of a set of functions, wherein the set includes functions with a plurality of different frequencies between 30 to 240 cycles per minute;

    selecting, based on results obtained in the comparing step, a function from the set that best matches the input signal; and

    using the frequency of the selected function as an estimate of the pulse rate of the subject.

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