ANALYTE SENSORS COMPRISING ELECTRODES HAVING SELECTED ELECTROCHEMICAL AND MECHANICAL PROPERTIES
First Claim
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1. An amperometric glucose sensor system comprising:
- a processor;
a first working electrode comprising a first electrochemically reactive surface formed from an iridium composition, wherein the first electrochemically reactive surface generates an electrochemical signal that is assessed by the processor in the presence of glucose;
a second working electrode comprising a second electrochemically reactive surface formed from a platinum composition, wherein the second electrochemically reactive surface generates an electrochemical signal that is assessed by the processor in the presence of glucose;
a counter electrode;
a reference electrode; and
a computer-readable program code having instructions, which when executed cause the processor to;
assess electrochemical signal data obtained from the first working electrode and the second working electrode; and
compute a glucose concentration based upon the electrochemical signal data obtained from the first working electrode and/or the second working electrode.
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Abstract
Embodiments of the invention disclosed herein comprise amperometric glucose sensor systems that include multiple working electrodes having different material properties as well as algorithms and other elements designed for use with such systems. While embodiments of the innovation can be used in a number of contexts, typical embodiments of the invention include glucose sensors used to facilitate the management of diabetes.
57 Citations
20 Claims
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1. An amperometric glucose sensor system comprising:
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a processor; a first working electrode comprising a first electrochemically reactive surface formed from an iridium composition, wherein the first electrochemically reactive surface generates an electrochemical signal that is assessed by the processor in the presence of glucose; a second working electrode comprising a second electrochemically reactive surface formed from a platinum composition, wherein the second electrochemically reactive surface generates an electrochemical signal that is assessed by the processor in the presence of glucose; a counter electrode; a reference electrode; and a computer-readable program code having instructions, which when executed cause the processor to; assess electrochemical signal data obtained from the first working electrode and the second working electrode; and compute a glucose concentration based upon the electrochemical signal data obtained from the first working electrode and/or the second working electrode. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A method for computing a blood glucose concentration in a diabetic patient, the method comprising:
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observing electrochemical signal data generated by a sensor system comprising; a processor; a first working electrode comprising a first electrochemically reactive surface formed from an iridium composition, wherein the first electrochemically reactive surface generates an electrochemical signal that is assessed by the processor in the presence of glucose; a second working electrode comprising a second electrochemically reactive surface formed from a platinum composition, wherein the second electrochemically reactive surface generates an electrochemical signal that is assessed by the processor in the presence of glucose; a counter electrode; a reference electrode; and a computer-readable program code having instructions, which when executed cause the processor to; assess electrochemical signal data obtained from the first working electrode and the second working electrode; and compute a glucose concentration based upon the electrochemical signal data obtained from the first working electrode and the second working electrode; wherein the first working electrode and second working electrode are configured to be electronically independent of one another; and
the method further comprises;comparing the electrochemical signal data from the first working electrode and the second working electrode; and computing a blood glucose concentration using the comparison of the electrochemical signal data obtained from the first working electrode and the second working electrode. - View Dependent Claims (16, 17, 18)
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19. A composition of matter comprising:
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an iridium composition having an electrochemically reactive surface; a glucose oxidase composition disposed upon the electrochemically reactive surface; an analyte modulating layer disposed upon the glucose oxidase composition, wherein the analyte modulating layer comprises; a linear polyurethane/polyurea polymer; a branched acrylate polymer;
ora blended mixture of the linear polyurethane/polyurea polymer and the branched acrylate polymer, wherein the mixture is blended at a ratio of between 1;
1 and 1;
20 by weight percentage. - View Dependent Claims (20)
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Specification