Patent ID: 9549696
Date: 2017-01-24
CPC Classifications: A61B,G16H,H05K,Y10S

Claim:
1. A physiological parameter measurement method comprising: receiving light intensity values responsive to detection of light at the three or more wavelengths after transmission into a tissue site and attenuation by the tissue site; determining a physiological measurement including an indication of a relationship among the light intensity values at three or more wavelengths; selecting, based on the physiological measurement, at least one of a plurality of reference data sets, wherein the reference data sets are empirically determined and each include 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, a measure of confidence in the physiological measurement.