Dual electrode system for a continuous analyte sensor

  • US 7,460,898 B2
  • Filed: 10/04/2006
  • Issued: 12/02/2008
  • Est. Priority Date: 12/05/2003
  • Status: Active Grant
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First Claim
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1. An analyte sensor configured for insertion into a host for measuring an analyte in the host, the sensor comprising:

  • a first working electrode comprising a first electroactive surface disposed beneath an active enzymatic portion of a sensor membrane, wherein the first working electrode is configured to generate a first signal; and

    a second working electrode comprising a second electroactive surface disposed beneath an inactive-enzymatic or a non-enzymatic portion of a sensor membrane, wherein the second working electrode is configured to generate a second signal, wherein the first electroactive surface and the second electroactive surface are configured and arranged to be equivalently influenced by in vivo environmental factors when implanted in a host such that a signal component associated with the in vivo environmental factors can be removed from the first signal, wherein the first and second electrodes are configured and arranged around a circumference of the sensor along an overlapping length of the sensor.

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