Analyte sensor with increased reference capacity
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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Abstract
Systems and methods of use for continuous analyte measurement of a host'"'"'s vascular system are provided. In some embodiments, a continuous glucose measurement system includes an electrochemical sensor incorporating a silver/silver chloride reference electrode, wherein a capacity of the reference electrode is controlled.
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Citations
6 Claims
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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. - View Dependent Claims (2, 3, 4, 5, 6)
Specification