System and method for measuring an analyte in a sample
First Claim
1. A system for determining a corrected glucose concentration of a sample, comprising:
- an electrochemical cell having at least two electrodes including a first electrode and a second electrode, the electrochemical cell being sized and configured to receive the sample, the electrochemical cell further configured to determine an initial glucose concentration and also configured to generate a pre-determined voltage between the first and second electrodes for a pre-determined amount of time, and further configured to measure at least one resulting current of the sample during the pre-determined time; and
a processor programmed for receiving a set of data from the electrochemical cell, the data including the initial glucose concentration, at least one applied voltage, and at least one resulting current, the processor further programmed to utilize this data to determine a corrected glucose concentration, said electrochemical cell being further configured to measure a hematocrit level of the sample, and in which the processor receives and utilizes the measured hematocrit level to determine a correction term based on the measured hematocrit level and the initial glucose concentration, the processor being further programmed to utilize the correction term as data in determining the corrected glucose concentration.
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Abstract
Methods of determining a corrected analyte concentration in view of some error source are provided herein. The methods can be utilized for the determination of various analytes and/or various sources of error. In one example, the method can be configured to determine a corrected glucose concentration in view of an extreme level of hematocrit found within the sample. In other embodiments, methods are provided for identifying various system errors and/or defects. For example, such errors can include partial-fill or double-fill situations, high track resistance, and/or sample leakage. Systems are also provided for determining a corrected analyte concentration and/or detecting some system error.
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Citations
14 Claims
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1. A system for determining a corrected glucose concentration of a sample, comprising:
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an electrochemical cell having at least two electrodes including a first electrode and a second electrode, the electrochemical cell being sized and configured to receive the sample, the electrochemical cell further configured to determine an initial glucose concentration and also configured to generate a pre-determined voltage between the first and second electrodes for a pre-determined amount of time, and further configured to measure at least one resulting current of the sample during the pre-determined time; and a processor programmed for receiving a set of data from the electrochemical cell, the data including the initial glucose concentration, at least one applied voltage, and at least one resulting current, the processor further programmed to utilize this data to determine a corrected glucose concentration, said electrochemical cell being further configured to measure a hematocrit level of the sample, and in which the processor receives and utilizes the measured hematocrit level to determine a correction term based on the measured hematocrit level and the initial glucose concentration, the processor being further programmed to utilize the correction term as data in determining the corrected glucose concentration. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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Specification