Patent ID: 8543184

Claim:
A transcutaneous implantable continuous analyte sensor, comprising: a working electrode configured to be transcutaneously implanted; and a membrane disposed over at least a portion of the working electrode, the membrane comprising a blend, the blend comprising a silicone-containing polymer and a hydrophilic polymer; wherein the membrane is configured to reduce or block passage therethrough of acetaminophen, whereby when: (1) the sensor is placed in a 2L bath filled with phosphate buffered saline, continuously stirred, brought to a temperature of 37° C., allowed to equilibrate for 1 hour until the sensor reaches a flat line continuous baseline signal; and (2) acetaminophen is then added to the bath to a dilution of 3.8 mg/dL and the sensor is then allowed to equilibrate over 1 hour while measurements are continuously recorded from the sensor; the signal does not change by more than 1%.