Physiological parameter confidence measure
First Claim
1. A method of determining a measure of confidence in a physiological parameter, the physiological parameter determined by transmitting multiple wavelengths of optical radiation into a tissue site and detecting the optical radiation after tissue attenuation, the method comprising:
- deriving physiological data responsive to the intensity of multiple wavelengths of optical radiation transmitted into a tissue site and detected after tissue attenuation;
estimating a physiological parameter based upon the physiological data;
providing a physiological data reference;
obtaining at least one data cluster from the physiological data reference wherein the at least one data cluster is a probability distribution of normalized pleth ratios; and
determining a measure of confidence in the estimated physiological parameter based upon the at least one data cluster and the derived physiological data.
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Abstract
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.
1133 Citations
9 Claims
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1. A method of determining a measure of confidence in a physiological parameter, the physiological parameter determined by transmitting multiple wavelengths of optical radiation into a tissue site and detecting the optical radiation after tissue attenuation, the method comprising:
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deriving physiological data responsive to the intensity of multiple wavelengths of optical radiation transmitted into a tissue site and detected after tissue attenuation; estimating a physiological parameter based upon the physiological data; providing a physiological data reference; obtaining at least one data cluster from the physiological data reference wherein the at least one data cluster is a probability distribution of normalized pleth ratios; and determining a measure of confidence in the estimated physiological parameter based upon the at least one data cluster and the derived physiological data. - View Dependent Claims (2, 3, 4, 5)
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6. A physiological parameter confidence measurement method comprising:
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deriving physiological data responsive to the intensity of multiple wavelengths of optical radiation transmitted into a tissue site and detected after tissue attenuation; estimating a physiological parameter based upon the physiological data; providing a physiological data reference having a plurality of data clusters each corresponding to a particular value of the physiological parameter,; comparing at least one of the data clusters to the physiological data; indicating confidence in the estimated physiological parameter based upon the comparison; and associating a probability function with each of the data clusters. - View Dependent Claims (7, 8, 9)
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Specification