Analyte sensor with increased reference capacity

  • US 10,470,691 B2
  • Filed: 12/06/2016
  • Issued: 11/12/2019
  • Est. Priority Date: 07/02/2009
  • Status: Active Grant
First Claim
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1. An implantable electrochemical sensor for measuring an analyte concentration in a host, comprising:

  • a two-electrode sensor assembly configured to be implanted in a host and be exposed to interstitial fluid, wherein the two-electrode sensor assembly comprises;

    a working electrode configured to measure a signal associated with a concentration of an analyte;

    a reference electrode, wherein the reference electrode comprises a conductive material, wherein the reference electrode is configured to provide substantially stable reference potential for sixteen days while continuously responding to a signal current of 20 nA from the working electrode; and

    an enzyme-containing membrane disposed over at least a portion of the working electrode, and wherein at least a portion of the reference electrode is in direct contact with the enzyme-containing membrane.

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