System and Method for Estimating Substance Concentrations in Bodily Fluids
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United States of America Patent
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Issued Date -
Dec 18, 2008
app pub date -
Nov 23, 2006
filing date -
Nov 23, 2005
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Abandoned
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Abstract
A first aspect of the invention relates to a method for estimating the optical response of a subject comprising blood, the method comprising forming a model whereby the spectral response of a subject to incident light can be estimated, the model including a plurality of parameters, each parameter corresponding to the influence on the spectral response of a respective biochemical substance, directing light of a known spectral content at the subject, detecting the spectral response of the subject to the light and repeatedly performing the steps of: i. modelling the spectral response of the subject to the light by means of the model; ii. comparing the modelled spectral response with the detected response; and iii. altering the model in dependence on that comparison by varying one or more of the said parameters.
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