Method of calibrating a spectroscopic device

Details Method of calibrating a spectroscopic device Method of calibrating a spectroscopic device

2005-07-19

2005-07-19

Porta, David (Department: 2878)

Radiant energy

Invisible radiant energy responsive electric signalling

Infrared responsive

C250S339070, C250S341500

Reexamination Certificate

active

06919566

ABSTRACT:
The present invention provides a method of calibrating a spectroscopic device for providing a non-invasive measurement of an analyte level in a sample. The method comprises the steps of: (a) providing a plurality of calibration algorithms; (b) taking a set of non-invasive measurements on said sample with said spectroscopic device; (c) calculating a predicted set of analyte levels for each of the calibration algorithms in response to the set of non-invasive measurements, each of the predicted sets of analyte levels being characterized by a variability range, a slope, an Rimg id="CUSTOM-CHARACTER-00001" he="2.46mm" wi="1.78mm" file="US06919566-20050719-P00900.TIF" alt="custom character" img-content="character" img-format="tif" ?2img id="CUSTOM-CHARACTER-00002" he="2.46mm" wi="1.78mm" file="US06919566-20050719-P00900.TIF" alt="custom character" img-content="character" img-format="tif" ?(a square of the correlation between said set of non-invasive measurements and said predicted set of analyte levels), and a standard error of prediction; and (d) selecting an appropriate calibration algorithm by using a suitability score based on the variability range, the slope, the R2an the standard error of prediction for each of the predicted sets of analyte levels. A method of generating suitable calibration algorithms in step (a) is also provided.

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“Strategies for Coupling Digital Filtering with Partial Least-Squares Regression: Application to the Determination of Glucose in Plasma by Fourier Transform Near-Infrared Spectroscopy”; Small, G. et al.; Analytical Chemistry, US, American Chemical Society. Columbus. vol. 65, No. 22; Nov. 15, 1993; pp. 3279-3289.

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