Dual electrode system for a continuous analyte sensor

  • US 7,366,556 B2
  • Filed: 10/04/2006
  • Issued: 04/29/2008
  • 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 membrane;

    a second working electrode comprising a second electroactive surface disposed beneath an inactive-enzymatic or non-enzymatic portion of a membrane; and

    an electrical insulator located between the first working electrode and the second working electrode, wherein the sensor comprises a physical diffusion barrier configured to structurally block a substantial amount of diffusion of at least one of an analyte and a co-analyte between the first electroactive surface and the second eleetroactive surface by a structure that protrudes from a plane that intersects both the first electroactive surface and the second eleetroactive surface, wherein the structure that protrudes comprises the electrical insulator and/or an electrode.

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