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Methods and systems for conditioning physiological information using a normalization technique

  • US 9,241,670 B2
  • Filed: 09/11/2012
  • Issued: 01/26/2016
  • Est. Priority Date: 09/11/2012
  • Status: Active Grant
First Claim
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1. A subject pulse oximetry monitoring system for conditioning determining a physiological rate, comprising:

  • a pulse oximetry sensor configured to generate a physiological signal, wherein the pulse oximetry sensor is configured to detect light attenuated by a subject; and

    a pulse oximeter coupled to the pulse oximetry sensor, wherein equipment pulse oximeter is configured to;

    receive the physiological signal from the pulse oximetry sensor;

    generate a positive signal by replacing each negative value of the physiological signal with a predetermined value;

    generate a negative signal by replacing each positive value of the physiological signal with a predetermined value;

    filter the positive signal to generate a filtered positive signal;

    filter the negative signal to generate a filtered negative signal;

    combine the filtered positive signal and the filtered negative signal to generate a combined signal;

    modify the physiological signal based on the combined signal;

    determine a physiological rate of the subject based on the modified physiological signal; and

    display the physiological rate of the subject on a display.

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