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Physiological parameter confidence measure

  • US 9,167,995 B2
  • Filed: 03/18/2014
  • Issued: 10/27/2015
  • Est. Priority Date: 03/01/2005
  • Status: Active Grant
First Claim
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1. A physiological parameter measurement method comprising:

  • determining a physiological measurement including an indication of a relationship among light intensity values at three or more wavelengths, the light intensity values obtained in response to detection of light at the three or more wavelengths after transmission into a tissue site and attenuation by the tissue site;

    selecting at least one of a plurality of reference data sets corresponding to the physiological measurement, the reference data sets being empirically determined and each including a respective indication of a relationship among empirically determined light intensity values for a respective measurement at the three or more wavelengths;

    comparing the physiological measurement to the selected at least one of the reference data sets at the three or more wavelengths; and

    determining, based on the comparison, whether or not the physiological measurement represents a physiologically significant measurement.

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