GLUCOSE TEST STRIP WITH INTERFERENCE CORRECTION
First Claim
1. A test strip comprising:
- a base layer;
a hematocrit anode disposed on the base layer and configured to determine a value corresponding to a hematocrit level of a fluid sample, wherein the hematocrit anode is free of a reagent;
an interference anode disposed on the base layer and configured to determine a value corresponding to a measurement of an interference caused by one or more oxidizable substances in the sample fluid, wherein the interference anode electrode includes an interference reagent on its surface;
a glucose anode disposed on the base layer, the glucose anode being configured to determine a glucose level in the fluid sample, wherein the glucose anode is covered with a reagent comprising a mediator and an analyte specific enzyme; and
one or more cathodes in a cooperative relation with the hematocrit anode, the interference anode, and the glucose anode to measure the hematocrit level, the interference and the glucose level.
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Accused Products
Abstract
A test strip comprising a base layer, the base layer having an optional hematocrit anode configured to determine a value corresponding to a hematocrit level of a fluid sample, wherein the hematocrit anode may be coated with a reagent, an interference anode configured to determine a value corresponding to a measurement of an interference caused by one or more oxidizable substances in the sample fluid, wherein the interference anode electrode includes an interference reagent on its surface, a glucose anode, the glucose anode being configured to determine a glucose level in the fluid sample, wherein the glucose anode is covered with a reagent comprising a mediator and an analyte specific enzyme, and one or more cathodes in a cooperative relation with the hematocrit anode, the interference anode, and the glucose anode to measure the hematocrit level, the interference and the glucose level.
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Citations
20 Claims
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1. A test strip comprising:
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a base layer; a hematocrit anode disposed on the base layer and configured to determine a value corresponding to a hematocrit level of a fluid sample, wherein the hematocrit anode is free of a reagent; an interference anode disposed on the base layer and configured to determine a value corresponding to a measurement of an interference caused by one or more oxidizable substances in the sample fluid, wherein the interference anode electrode includes an interference reagent on its surface; a glucose anode disposed on the base layer, the glucose anode being configured to determine a glucose level in the fluid sample, wherein the glucose anode is covered with a reagent comprising a mediator and an analyte specific enzyme; and one or more cathodes in a cooperative relation with the hematocrit anode, the interference anode, and the glucose anode to measure the hematocrit level, the interference and the glucose level. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A system for measuring glucose concentration comprising:
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a test strip comprising a base layer;
a hematocrit anode disposed on the base layer and configured to determine a value corresponding to a hematocrit level of the fluid sample, wherein the hematocrit anode is free of a reagent;
an interference anode disposed on the base layer and configured to determine a value corresponding to a measurement of an interference caused by one or more oxidizable substances in the sample fluid, wherein the interference anode electrode includes an interference reagent on its surface;
a glucose anode is disposed on the base layer, the glucose anode electrode is configured to determine a glucose level in the fluid sample; and
one or more cathodes in a cooperative relation with the anodes to measure hematocrit level, interference and glucose level; anda test meter configured to accept the test strip, the test meter configured to apply a voltage between the anodes and the one or more cathodes, measure current corresponding to hematocrit level, glucose level and interference, and determine a glucose concentration based on the detected currents. - View Dependent Claims (16, 17)
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18. A method for measuring an amount of glucose in a sample of blood comprising:
measuring a hematocrit value in a sample of blood placed onto a test strip, wherein the test strip comprises a base layer;
a hematocrit anode disposed on the base layer and configured to determine a value corresponding to a hematocrit level of the fluid sample, wherein the hematocrit anode is free of a reagent;
an interference anode disposed on the base layer and configured to determine a value corresponding to a measurement of an interference caused by one or more oxidizable substances in the sample fluid, wherein the interference anode electrode includes an interference reagent on its surface;
a glucose anode is disposed on the base layer, the glucose anode electrode is configured to determine a glucose level in the fluid sample; and
one or more cathodes in a cooperative relation with the anodes to measure hematocrit level, interference and glucose level;measuring an amount of glucose in the sample; determining an amount of interference from one or more interferents present in the sample; and calculating, with the meter, a final glucose value in the sample by adjusting the measured amount of glucose with both the measured hematocrit value and the determined amount of interference. - View Dependent Claims (19, 20)
Specification