Methods of electrochemically measuring an analyte with a test sequence having a pulsed DC block as well as devices, apparatuses and systems incorporating the same
First Claim
1. A method of electrochemically measuring an analyte in a fluid sample, the method comprising the steps of:
- applying an electrical test sequence to an electrochemical biosensor, the biosensor comprising;
an electrode system,a reagent in electrical communication with the electrode system, anda receptacle configured to contact the fluid sample provided to the biosensor,with the fluid sample in fluidic contact with the reagent, wherein the test sequence comprises at least two blocks, each block configured to produce response information to the test sequence, wherein one block is an alternating current (AC) block and another block is a direct current (DC) block, wherein the DC block includes at least one recovery potential, and wherein a closed circuit condition of the electrode system is maintained during the DC block;
measuring the information from the response to the test sequence, including information from the at least one recovery potential; and
determining an analyte concentration of the fluid sample using the information, the determining based at least in part upon the information from the at least one recovery potential.
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Accused Products
Abstract
Methods are disclosed for measuring an analyte concentration in a fluidic sample. Such methods further allow one to correct and/or compensate for confounding variables such as hematocrit (Hct), temperature or both before providing an analyte concentration. The measurement methods utilize information obtained from test sequences having at least one AC block and at least one pulsed DC block, where pulsed DC block includes at least one recovery potential, and where a closed circuit condition of the electrode system is maintained during the DC block. Also disclosed are devices, apparatuses and systems incorporating the various measurement methods.
8 Citations
21 Claims
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1. A method of electrochemically measuring an analyte in a fluid sample, the method comprising the steps of:
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applying an electrical test sequence to an electrochemical biosensor, the biosensor comprising; an electrode system, a reagent in electrical communication with the electrode system, and a receptacle configured to contact the fluid sample provided to the biosensor, with the fluid sample in fluidic contact with the reagent, wherein the test sequence comprises at least two blocks, each block configured to produce response information to the test sequence, wherein one block is an alternating current (AC) block and another block is a direct current (DC) block, wherein the DC block includes at least one recovery potential, and wherein a closed circuit condition of the electrode system is maintained during the DC block; measuring the information from the response to the test sequence, including information from the at least one recovery potential; and determining an analyte concentration of the fluid sample using the information, the determining based at least in part upon the information from the at least one recovery potential. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A method of electrochemically measuring an analyte in a fluid sample, the method comprising the steps of:
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applying an electrical test sequence to an electrochemical biosensor, the biosensor comprising; an electrode system, a reagent in electrical communication with the electrode system, and a receptacle configured to contact the fluid sample provided to the biosensor, with the fluid sample in fluidic contact with the reagent, wherein the test sequence comprises at least one direct current (DC) block configured to produce response information to the test sequence, wherein the DC block includes at least one recovery potential, and wherein a closed circuit condition of the electrode system is maintained during the DC block; measuring information from the response to the test sequence, including information from the at least one recovery potential; and determining an analyte concentration of the fluid sample using the information, the determining based at least in part upon the information from the at least one recovery potential. - View Dependent Claims (20, 21)
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Specification