Method for predicting the blood glucose level of a person
First Claim
1. A method for predicting blood glucose level of a person using a near-infrared spectral scan of a body part of the person, comprising:
- performing on a person a near-infrared spectral scan of a body part at a first group of wavelengths and at a second group of wavelengths,determining a first group of near-infrared absorbance values for the first group of wavelengths and a second group of near-infrared absorbance values for the second group of wavelengths,determining a first difference for the first group of near-infrared absorbance values and a second difference for the second group of near-infrared absorbance values, andcalculating a blood glucose level for the person, using the first and second differences.
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Abstract
A method for predicting blood glucose level of a person includes performing on the person a near-infrared spectral scan of a body part at a first group of wavelengths and at a second group of wavelengths, determining a first group of near-infrared absorbance values for the first group of wavelengths and a second group of near-infrared absorbance values for the second group of wavelengths, determining a first difference for the first group of near-infrared absorbance values and a second difference for the second group of near-infrared absorbance values, and calculating a blood glucose level for the person using the first and second differences.
35 Citations
14 Claims
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1. A method for predicting blood glucose level of a person using a near-infrared spectral scan of a body part of the person, comprising:
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performing on a person a near-infrared spectral scan of a body part at a first group of wavelengths and at a second group of wavelengths, determining a first group of near-infrared absorbance values for the first group of wavelengths and a second group of near-infrared absorbance values for the second group of wavelengths, determining a first difference for the first group of near-infrared absorbance values and a second difference for the second group of near-infrared absorbance values, and calculating a blood glucose level for the person, using the first and second differences. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method for predicting blood glucose level of a person using a near-infrared spectral scan of a body part of the person, comprising:
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providing an evaluation model based on a population of test subjects, the evaluation model relating near-infrared absorbance of blood vessels of a body part of the test subjects at first and second groups of wavelengths to a glucose level of the blood vessels, performing on a person a near-infrared spectral scan of a body part at a first group of wavelengths and at a second group of wavelengths, determining a first group of near-infrared absorbance values for the first group of wavelengths and a second group of near-infrared absorbance values for the second group of wavelengths, and using the evaluation model to determine a blood glucose level for the person, the evaluation model comprising; determining a first difference for the first group of near-infrared absorbance values and a second difference for the second group of near-infrared absorbance values, dividing the first difference by the second difference to find a first resultant, multiplying the first resultant by a first empirical constant to find a second resultant, and offsetting the second resultant by a second empirical constant. - View Dependent Claims (9, 10, 11, 12, 13)
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14. A method of determining blood glucose level of a person from near-infrared (NIR) absorbance values obtained by a near-infrared spectral scan of a body part of the person, comprising:
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dividing the NIR absorbance values into first and second groups, determining a first difference for the first group of absorbance values and a second difference for the second group of absorbance values, dividing the first difference by the second difference to find a first resultant, multiplying the first resultant by a first empirical constant to find a second resultant, and offsetting the second resultant by a second empirical constant.
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Specification