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US 8,527,026 B2Granted
Device and method for determining analyte levels
AssigneeDexCom, Inc.
InventorsMark C. Shults, Stuart J. Updike, Rathbun K. Rhodes, Barbara J. Gilligan, Mark A. Tapsak
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Abstract
Devices and methods for determining analyte levels are described. The devices and methods allow for the implantation of analyte-monitoring devices, such as glucose monitoring devices that result in the delivery of a dependable flow of blood to deliver sample to the implanted device. The devices include unique architectural arrangement in the sensor region that allows accurate data to be obtained over long periods of time.
Claims4
An implantable sensor for measuring glucose, the sensor comprising:
- an electrode configured to measure glucose;
- and
- a membrane disposed on at least a portion of the electrode, the membrane comprising a first domain that comprises polyurethane and polyvinylpyrrolidone and a second domain that comprises an enzyme, wherein the first domain is configured to allow transport of glucose and oxygen and prevent entry of inflammatory cells, and wherein the first domain is distal to the second domain with respect to the electrode.
Dependencies are inferred from the claim text.