Method of Reducing the Effect of Direct Interference Current in an Electrochemical Test Strip
First Claim
1. A method of reducing interferences in an electrochemical sensor comprising:
- measuring a first current at a first working electrode, said first working electrode being covered by a reagent layer, measuring a second current at a second working electrode, wherein said reagent layer partially covers said second working electrode, said second working electrode having a covered area and an uncovered area; and
calculating a corrected current value representative of a glucose concentration using a ratio of said covered area to said uncovered area of said second working electrode.
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Abstract
This invention describes a method of reducing the effect of interfering compounds in a bodily fluid when measuring an analyte using an electrochemical sensor (62). In particular, the present method is applicable to electrochemical sensors where (62) the sensor includes a substrate (50), first and second working electrodes (10, 12), and a reference electrode (14) and either the first and second or only the second working electrode include regions which are bare of reagent (22). In this invention, an algorithm is described with mathematically corrects for the interference effect using the test strip embodiments of the present invention.
144 Citations
4 Claims
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1. A method of reducing interferences in an electrochemical sensor comprising:
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measuring a first current at a first working electrode, said first working electrode being covered by a reagent layer, measuring a second current at a second working electrode, wherein said reagent layer partially covers said second working electrode, said second working electrode having a covered area and an uncovered area; and
calculating a corrected current value representative of a glucose concentration using a ratio of said covered area to said uncovered area of said second working electrode. - View Dependent Claims (2)
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3. A method of reducing interferences in an electrochemical sensor comprising:
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measuring a second current at a first working electrode, wherein said reagent layer partially covers said first working electrode, said first working electrode having a first covered area and a first uncovered area;
measuring a second current at a second working electrode, wherein said reagent layer partially covers said second working electrode, said second working electrode having a second covered area and a second uncovered area; and
calculating a corrected current value representative of a glucose concentration using a ratio of said covered area to said uncovered area of said first and said second working electrodes. - View Dependent Claims (4)
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Specification