OPTICAL SENSOR CONFIGURATION AND METHODS FOR MONITORING GLUCOSE ACTIVITY IN INTERSTITIAL FLUID
First Claim
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1. A method for monitoring blood glucose in a subject, the method comprising:
- providing a glucose sensor, comprising;
an optical fiber configured for subcutaneous deployment and capable of propagating light along a light path, and further comprising an equilibrium, non-consuming chemical indicator system disposed within the light path of the optical fiber, wherein the chemical indicator system comprises a fluorophore capable of generating a fluorescent emission signal in response to an excitation light signal, and a glucose binding moiety operably associated with the fluorophore and adapted to modify the intensity of the fluorescent emission signal in relation to the amount of glucose bound;
deploying the glucose sensor into subcutaneous tissue of the subject;
interrogating the chemical indicator system with an excitation light signal; and
detecting the intensity of the fluorescent emission light signal.
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Abstract
Embodiments of the invention are directed to an optical sensor for detecting blood glucose by deploying the optical sensor into the interstitial fluid. The sensor comprises a chemical indicator system capable of generating an optical signal related to the blood glucose activity. The sensor further comprises a means for generating and detecting an optical reference signal unrelated to the blood glucose activity, such that ratiometric correction of blood glucose measurements for artifacts in the optical system is enabled.
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12 Claims
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1. A method for monitoring blood glucose in a subject, the method comprising:
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providing a glucose sensor, comprising; an optical fiber configured for subcutaneous deployment and capable of propagating light along a light path, and further comprising an equilibrium, non-consuming chemical indicator system disposed within the light path of the optical fiber, wherein the chemical indicator system comprises a fluorophore capable of generating a fluorescent emission signal in response to an excitation light signal, and a glucose binding moiety operably associated with the fluorophore and adapted to modify the intensity of the fluorescent emission signal in relation to the amount of glucose bound; deploying the glucose sensor into subcutaneous tissue of the subject; interrogating the chemical indicator system with an excitation light signal; and detecting the intensity of the fluorescent emission light signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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