System and method for determining an in vivo concentration of a small molecule substance of interest in a noninvasive manner
First Claim
1. A method of determining blood glucose in a subject, comprising:
- placing a glucose collector in contact with an area of the skin of the subject, wherein the glucose collector is adapted to collect glucose that has passively diffused through the skin of the subject (“
skin glucose”
);
maintaining the glucose collector in contact with the skin area for a predetermined time that is sufficient to collect at least some of the skin glucose;
measuring a concentration of the skin glucose collected by the glucose collector with a glucose detector that is adapted to measure the skin glucose collected by the glucose collector, wherein the glucose detector comprises a glucose binding protein sensor; and
extrapolating blood glucose concentration in the subject based on a correlation between the blood glucose concentration in the subject and the measured skin glucose concentrations;
wherein the glucose collector comprises a swab moistened with buffer solution, and wherein measuring a concentration of skin glucose on the swab with a glucose detector comprises,submerging the swab containing skin glucose in a buffer solution for a predetermined time that is sufficient to transfer at least some of the skin glucose from the swab to the buffer solution,placing the at least some of the skin glucose containing buffer solution in contact with the glucose binding protein sensor,measuring the fluorescence response of the glucose binding protein sensor after it has come into contact with the skin glucose containing buffer solution, andcalculating a skin glucose concentration value based on the fluorescence response of the glucose binding protein sensor.
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Accused Products
Abstract
Systems and methods for determining an in vivo concentration of a small molecule substance of interest is provided that takes advantage of the semi-permeable nature of skin, which allows small molecules to passively diffuse through the skin and onto the skin surface. The systems and methods of the present invention allow for the collection of these small molecules that have passively diffused through the skin without skin disruption or breaking of the skin. The systems and methods of the present invention are noninvasive, painless and safe even for delicate newborns, and are particularly suited for the determination of blood glucose in newborns and infants in a noninvasive manner.
8 Citations
16 Claims
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1. A method of determining blood glucose in a subject, comprising:
-
placing a glucose collector in contact with an area of the skin of the subject, wherein the glucose collector is adapted to collect glucose that has passively diffused through the skin of the subject (“
skin glucose”
);maintaining the glucose collector in contact with the skin area for a predetermined time that is sufficient to collect at least some of the skin glucose; measuring a concentration of the skin glucose collected by the glucose collector with a glucose detector that is adapted to measure the skin glucose collected by the glucose collector, wherein the glucose detector comprises a glucose binding protein sensor; and extrapolating blood glucose concentration in the subject based on a correlation between the blood glucose concentration in the subject and the measured skin glucose concentrations; wherein the glucose collector comprises a swab moistened with buffer solution, and wherein measuring a concentration of skin glucose on the swab with a glucose detector comprises, submerging the swab containing skin glucose in a buffer solution for a predetermined time that is sufficient to transfer at least some of the skin glucose from the swab to the buffer solution, placing the at least some of the skin glucose containing buffer solution in contact with the glucose binding protein sensor, measuring the fluorescence response of the glucose binding protein sensor after it has come into contact with the skin glucose containing buffer solution, and calculating a skin glucose concentration value based on the fluorescence response of the glucose binding protein sensor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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Specification