Analyte Test Sensor and Method of Manufacturing the Same
First Claim
1. An analyte test sensor for use in measuring the concentration of a particular analyte in a test sample, the analyte test sensor comprising:
- (a) a non-conductive substrate,(b) a reference electrode deposited on the substrate, the reference electrode comprising a first end and a second end,(c) a working electrode deposited on the substrate in a spaced apart relationship from the reference electrode, the working electrode comprising a first end and a second end,(d) an enzyme deposited on the working electrode, the enzyme generating a first current when exposed to the analyte in the test sample, the value of the first current being proportional to the concentration of the analyte in the test sample, and(d) a compensation electrode deposited on the substrate, the compensation electrode comprising a first end and a second end,(e) wherein the compensation electrode is designed to correct test result inaccuracies which are the result of variances in the manufacturing of the analyte test sensor.
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Accused Products
Abstract
An analyte test sensor for use in measuring the concentration of a particular analyte in a test sample includes a non-conductive substrate, a reference electrode deposited on the substrate, a working electrode deposited on the substrate and a compensation electrode deposited on the substrate. The compensation electrode is provided with a resistive ladder and is designed to correct for test result inaccuracies which are the result of variances in the manufacturing of the test sensor. Specifically, in one embodiment, the compensation electrode corrects for test result inaccuracies in an analog manner by shunting a portion of the working current away from working electrode. In another embodiment, the compensation electrode corrects for test result inaccuracies in a digital manner by providing a calibration code which is proportional its resistance value. A batch of analyte test sensors are preferably manufactured in the following manner. An initial batch of the test sensors is constructed. Then, a limited sampling of the sensors is tested for accuracy using a control sample. Based on the test results, the resistance value of the compensation electrode for each remaining sensor in the batch is adjusted accordingly.
20 Citations
18 Claims
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1. An analyte test sensor for use in measuring the concentration of a particular analyte in a test sample, the analyte test sensor comprising:
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(a) a non-conductive substrate, (b) a reference electrode deposited on the substrate, the reference electrode comprising a first end and a second end, (c) a working electrode deposited on the substrate in a spaced apart relationship from the reference electrode, the working electrode comprising a first end and a second end, (d) an enzyme deposited on the working electrode, the enzyme generating a first current when exposed to the analyte in the test sample, the value of the first current being proportional to the concentration of the analyte in the test sample, and (d) a compensation electrode deposited on the substrate, the compensation electrode comprising a first end and a second end, (e) wherein the compensation electrode is designed to correct test result inaccuracies which are the result of variances in the manufacturing of the analyte test sensor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A method of manufacturing a common batch of analyte test sensors, wherein each test sensor can be used to measure the concentration of a particular analyte in a test sample, the method comprising the steps of:
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(a) providing a common batch of analyte test sensors, each analyte test sensor comprising a non-conductive substrate, a reference electrode deposited on the substrate, a working electrode deposited on the substrate in a spaced apart relationship from the reference electrode and a compensation electrode deposited on the substrate, the compensation electrode having a resistance value, (b) testing at least one analyte test sensor from the common batch using a test sample which has a known concentration of the particular analyte, the testing step yielding a first set of test results, (c) analyzing the first set of test results to determine the accuracy of the at least one analyte test sensor, and (d) adjusting the resistance value of the compensation electrode for each remaining test sensor in the common batch based upon the test results yielded in the testing step. - View Dependent Claims (15, 16, 17, 18)
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Specification