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; 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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Accused Products
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.
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Citations
23 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; 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, 6, 7, 8)
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9. 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; and
indicating confidence in the estimated physiological parameter based upon the comparison. - View Dependent Claims (10, 11, 12, 13)
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14. A confidence measurement system comprising:
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a plurality of physiological data responsive to the intensity of multiple wavelengths of optical radiation transmitted into a tissue site and detected after tissue attenuation;
a parameter estimator configured to input the physiological data and output an estimate of a physiological parameter;
a physiological data reference having a plurality of data clusters corresponding to known values of the physiological parameter; and
a confidence measurer adapted to compare the physiological data with the data clusters so as to calculate a measure of confidence in the physiological parameter estimate. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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21. A confidence measurement system comprising:
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a plurality of physiological data responsive to the intensity of multiple wavelengths of optical radiation transmitted into a tissue site and detected after tissue attenuation;
a parameter estimator configured to input the physiological data and output a corresponding physiological parameter estimate;
a physiological data reference means for providing data clusters according to known values of the physiological parameter; and
a confidence measurement means for determining confidence in physiological parameter estimate based upon the physiological data and the data clusters. - View Dependent Claims (22, 23)
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Specification