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Method and apparatus for detecting and analyzing variations in a physiologic parameter

  • US 8,509,869 B2
  • Filed: 05/15/2009
  • Issued: 08/13/2013
  • Est. Priority Date: 05/15/2009
  • Status: Expired due to Fees
First Claim
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1. A pulse oximetry system, comprising:

  • a sensor comprising;

    an emitter configured to emit light at different wavelengths into a tissue bed; and

    a detector configured to detect the light from the emitter after dispersion and/or reflection by the tissue bed; and

    a pulse oximeter configured to;

    receive signals from the sensor that are indicative of characteristics of the light detected by the detector;

    utilize the signals to estimate blood oxygen saturation values over time at a high resolution;

    detect variations in the blood oxygen saturation values that are smaller in magnitude than an accuracy, display precision, and/or calibration of the blood oxygen saturation values; and

    perform control and/or pattern detection functions based on the variations.

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