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Systems and methods for identifying portions of a physiological signal usable for determining physiological information

  • US 9,179,876 B2
  • Filed: 04/30/2012
  • Issued: 11/10/2015
  • Est. Priority Date: 04/30/2012
  • Status: Active Grant
First Claim
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1. A method for determining physiological information from a PPG signal, the method comprising:

  • receiving at an input of a pulse oximeter monitor the PPG signal generated by a pulse oximetry sensor;

    determining, using a pulse oximeter monitor, a presence of an artifact in a first portion of the PPG signal;

    determining, using the pulse oximeter monitor, a presence of a baseline shift that exceeds a baseline shift threshold in a second portion of the PPG signal;

    determining, using the pulse oximeter monitor, a pulse-to-pulse variability that exceeds a variability threshold in a third portion of the PPG signal; and

    identifying, using the pulse oximeter monitor, a contiguous portion of the PPG signal that does not include the first portion, the second portion, and the third portion, wherein the contiguous portion is at least a minimum length;

    determining, using the pulse oximeter monitor, the physiological information based on the contiguous portion; and

    indicating on the pulse oximeter monitor the physiological information.

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