Physiological parameter confidence measure

摘要

Confidence in a physiological parameter is measured from physiological data responsive to the intensity of multiple wavelengths of optical radiation after tissue attenuation. The physiological parameter is estimated based upon the physiological data. Reference data clusters are stored according to known values of the physiological parameter. At least one of the data clusters is selected according to the estimated physiological parameter. The confidence measure is determined from a comparison of the selected data clusters and the physiological data.

主权项

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.