Subcutaneous analyte sensor
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United States of America Patent
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Issued Date -
Dec 8, 2005
app pub date -
Apr 27, 2005
filing date -
Mar 16, 2001
priority date (Note) -
Abandoned
status (Latency Note)
Importance
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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