Dual electrode system for a continuous analyte sensor

  • US 7,896,809 B2
  • Filed: 11/03/2008
  • Issued: 03/01/2011
  • Est. Priority Date: 07/25/2003
  • Status: Active Grant
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First Claim
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1. A continuous glucose monitoring system configured for measuring glucose concentration in a host, the system comprising:

  • a continuous glucose sensor comprising a first working electrode disposed beneath an active enzymatic portion of a membrane system and configured to generate a first signal, and a second working electrode disposed beneath an inactive-enzymatic or a non-enzymatic portion of the membrane system and configured to generate a second signal, wherein the membrane system is configured to substantially reduce interfering species from reaching the first working electrode and the second working electrode; and

    electronics configured to process the first signal and the second signal to produce a glucose signal that is substantially without signal contribution from interfering species, and to monitor the second signal for a change in amplitude above a threshold.

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