Method of determining glucose concentration of a whole blood sample
First Claim
1. A method of determining glucose concentration of a whole blood sample using an optical test sensor, the method comprising:
- providing an optical test sensor including a reagent composition having an enzyme;
measuring transmission levels at two different wavelengths of the whole blood sample;
correcting absorbance bias of the whole blood sample, if any, caused by hematocrit levels using the transmission levels at two different wavelengths; and
determining the glucose concentration using the measured transmission levels and corrected absorbance bias, if any, of the whole blood sample.
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Accused Products
Abstract
A total transmission spectroscopy system for use in determining the analyte concentration in a fluid sample comprises a sample cell receiving area, a light source, a collimating lens, a first lens, a second lens, and a detector. The sample cell receiving area is adapted to receive a sample to be analyzed. The sample cell receiving area is constructed of a substantially optically clear material. The collimating lens is adapted to receive light from the light source and adapted to illuminate the sample cell receiving area with a substantially collimated beam of light. The first lens is adapted to receive regular and scattered light transmitted through the sample at a first angle of divergence. The first lens receives light having a first angle of acceptance. The first lens outputs light having a second angle of divergence. The second angle of divergence is less than the first angle of divergence. The second lens is adapted to receive light from the first lens and adapted to output a substantially collimated beam of light. The detector is adapted to measure the light output by the second lens.
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Citations
16 Claims
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1. A method of determining glucose concentration of a whole blood sample using an optical test sensor, the method comprising:
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providing an optical test sensor including a reagent composition having an enzyme; measuring transmission levels at two different wavelengths of the whole blood sample; correcting absorbance bias of the whole blood sample, if any, caused by hematocrit levels using the transmission levels at two different wavelengths; and determining the glucose concentration using the measured transmission levels and corrected absorbance bias, if any, of the whole blood sample. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A method of determining glucose concentration of a whole blood sample using an optical test sensor, the method comprising:
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providing the optical test sensor including a reagent composition having an enzyme; contacting the whole blood sample with the reagent composition; measuring the glucose concentration of the whole blood sample; correcting bias of the whole blood sample, if any, caused by a hematocrit level; and determining the glucose concentration using the measured glucose concentration and the corrected bias, if any, of the whole blood sample wherein the bias due to the hematocrit level of the determined glucose concentration is within +/−
5% between 20% to 60% hematocrit levels. - View Dependent Claims (16)
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Specification