Dual electrode system for a continuous analyte sensor

  • US 8,423,114 B2
  • Filed: 10/01/2007
  • Issued: 04/16/2013
  • Est. Priority Date: 10/04/2006
  • Status: Active Grant
First Claim
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1. A continuous glucose sensor configured for insertion into a host'"'"'s tissue, the sensor comprising:

  • a first working electrode comprising a first electroactive surface disposed beneath an active enzymatic portion of a sensor membrane, wherein the active enzymatic portion of the sensor membrane is configured to produce H2O2, and wherein the first working electrode is configured to generate a first signal having a first noise component related to a noise-causing species; and

    a second working electrode comprising a second electroactive surface disposed beneath an inactive-enzymatic or a non-enzymatic portion of the sensor membrane, wherein the second working electrode is configured to generate a second signal having a second noise component related to the noise-causing species, wherein the first electroactive surface and the second electroactive surface are each dimensioned to integrate at least one signal generated by a plurality of local point sources that produce the noise-causing species, such that the first noise component and the second noise component are substantially equivalent;

    wherein each of the first electroactive surface and the second electroactive surface are configured and arranged to integrate noise detected about a circumference of the sensor.

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