Residual based monitoring of human health
First Claim
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1. A method for monitoring the health status of a human, comprising the steps of:
- obtaining an input observation of multiple vital signs from the human, a vital sign being a direct sensor measurement of a biological signal or a transformation thereof;
providing in a computer accessible memory a set of exemplary observations of said multiple vital signs characteristic of the interrelationships between said multiple vital signs under normal health conditions for the monitored human;
generating with a computer an estimate of at least one of said multiple vital signs as a function of said input observation, using a linear combination of at least some of the exemplary observations, determined from a kernel-based comparison of the input observation and at least some exemplary observations;
differencing with a computer said estimate and the corresponding measured value of the at least one of said multiple vital signs in said input observation to yield a residual value upon which a determination is made related to the health status of the human.
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Abstract
Improved human health monitoring is provided in the context of sensor measurements of typical vital signs and other biological parameters, by a system and method using an empirical model of the parameters and disposed to estimate values of the parameters in response to actual measurements. Residuals resulting from the difference between the estimates and actual measurements are analyzed for robust indications of incipient health issues. Residual analysis is both more robust and more sensitive than conventional univariate range checking on vital signs.
104 Citations
44 Claims
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1. A method for monitoring the health status of a human, comprising the steps of:
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obtaining an input observation of multiple vital signs from the human, a vital sign being a direct sensor measurement of a biological signal or a transformation thereof; providing in a computer accessible memory a set of exemplary observations of said multiple vital signs characteristic of the interrelationships between said multiple vital signs under normal health conditions for the monitored human; generating with a computer an estimate of at least one of said multiple vital signs as a function of said input observation, using a linear combination of at least some of the exemplary observations, determined from a kernel-based comparison of the input observation and at least some exemplary observations; differencing with a computer said estimate and the corresponding measured value of the at least one of said multiple vital signs in said input observation to yield a residual value upon which a determination is made related to the health status of the human. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44)
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Specification