Method Of Using An Electrochemical Test Sensor
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Accused Products
Abstract
A method of distinguishing a control solution from a sample in an electrochemical test sensor is performed. The method includes adding a control marker to the control solution. The control solution includes the control marker and analyte. The test sensor includes working and counter electrodes, and a reagent. A potential is applied to the test sensor to oxidize the control marker and the analyte. The resulting electrical current is measured. A potential is applied to the test sensor lower than the other potential in which the potential is sufficient to oxidize the analyte and not the control marker. The resulting electrical current is measured. Determining whether a control solution or a sample is present based on the measured electrical currents. To increase the measured current, a salt may be added to the control solution in an amount sufficient to increase the electrical current by at least 5% as compared to a control solution in the absence of a salt.
2 Citations
62 Claims
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1-41. -41. (canceled)
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42. A method of using an electrochemical test sensor, the method comprising the acts of:
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introducing a fluid sample to the test sensor; applying a pulse sequence to the fluid sample, the pulse sequence comprising at least two duty cycles within 180 seconds, at least one of the duty cycles having a first potential in a first excitation period and a first relaxation period, and after one of the duty cycles, providing a second potential to the sample, the second potential being greater than the first potential, the second potential being supplied after a second relaxation period, the second relaxation period being less than the first relaxation period; measuring a first current at the first potential responsive to the analyte; measuring a second current at the second potential responsive to the analyte; and determining whether the fluid sample is a control solution or an analyte-fluid test sample based on the measured first and second currents. - View Dependent Claims (43, 44, 45, 46, 47, 48, 49)
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50. A method of using an electrochemical test sensor, the method comprising the acts of:
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introducing a fluid sample to the test sensor; applying a first voltage to the fluid sample; measuring a first current value of the fluid sample at the first voltage; measuring a second current value of the fluid sample at a second voltage; comparing the first current value to a number so as to determine if the sample is an analyte-fluid test sample; and if the comparison using the first current value does not result in determining whether the sample is an analyte-fluid test sample, then using at least a first current value at the first voltage and a second current value at a second voltage to determine whether a control solution or the analyte-fluid test sample is present, wherein the first voltage is a higher voltage than the second voltage. - View Dependent Claims (51, 52, 53, 54, 55, 56)
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57. A method of using an electrochemical test sensor, the method comprising the acts of:
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introducing a fluid sample to the test sensor; applying a pulse sequence to the fluid sample, the pulse sequence comprising at least two duty cycles within 180 seconds, at least one of the duty cycles having a first potential in a first excitation period and a first relaxation period, and after one of the duty cycles, providing a second potential to the sample, the second potential being greater than the first potential, the second potential being supplied after a second relaxation period; measuring a first current at the first potential responsive to an analyte; measuring a second current at the second potential responsive to the analyte; and determining whether the fluid sample is a control solution or an analyte-fluid test sample based on the measured first and second currents. - View Dependent Claims (58, 59, 60, 61, 62)
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Specification