Subcutaneous analyte sensor
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Accused Products
Abstract
Assembly and method for measuring the concentration of an analyte in a biological matrix. The assembly includes an implantable optical-sensing element that comprises a body, and a membrane mounted on the body in a manner such that the membrane and the body define a cavity. The membrane is permeable to the analyte, but is impermeable to background species in the biological matrix. A refractive element is positioned in the cavity. A light source transmits light of a first intensity onto the refractive element, and a light detector receives light of a second intensity that is reflected from the cavity. A controller device optically coupled to the detector compares the first and second light intensities, and relates the intensities to analyte concentration.
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Citations
113 Claims
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1-82. -82. (canceled)
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83. An assembly for measuring the concentration of an analyte in a biological matrix, comprising:
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an implantable optical-sensing element, said implantable optical-sensing element comprising;
a body wherein said body has a proximal end and a distal end;
a membrane mounted on said body, said membrane and body defining a cavity for receiving said analyte, said membrane being substantially permeable to said analyte and substantially impermeable to background species in said biological matrix; and
a refractive element disposed in said cavity, wherein the refractive element comprises a plurality of plates sequentially arranged traverse to a longitudinal axis of said body;
a source for providing light of a first intensity onto said refractive element in said cavity;
a detector for receiving light of a second intensity from said cavity; and
a signal-processing and computing element optically coupled to said detector for comparing said first and second intensities, and relating said intensities to analyte concentration. - View Dependent Claims (84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 112, 113)
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Specification