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Reducing data acquisition, power and processing for photoplethysmography and other applications

  • US 7,881,790 B1
  • Filed: 11/30/2007
  • Issued: 02/01/2011
  • Est. Priority Date: 07/19/2004
  • Status: Expired due to Fees
First Claim
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1. A method for reducing the amount of data required to analyze a hemodynamic signal, comprising:

  • (a) for a window of time that spans at least two respiratory cycles, producing only one sample of the hemodynamic signal per respiratory cycle, at a substantially same instant in each respiratory cycle, to thereby produce a plurality of samples for the window; and

    (b) analyzing the hemodynamic signal based on the plurality of samples,wherein each said sample is indicative of an amplitude of the hemodynamic signal at a single moment in one of the respiratory cycles.

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