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Systems, devices, and methods for improving accuracy of biosensors using fill time

  • US 8,623,198 B2
  • Filed: 12/17/2010
  • Issued: 01/07/2014
  • Est. Priority Date: 12/30/2009
  • Status: Active Grant
First Claim
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1. A method for determining a concentration of an analyte in a sample, the method comprising:

  • detecting a presence of the sample in an electrochemical sensor, the electrochemical sensor comprising two electrodes;

    determining a fill time of the sample with the two electrodes;

    calculating a correction factor in view of at least the fill time;

    reacting an analyte to cause a physical transformation of the analyte between the two electrodes; and

    determining the concentration of the analyte in view of the correction factor with the same two electrodes; and

    wherein determining the fill time of the sample comprises;

    applying an electric potential between the two electrodes while the sample is introduced;

    measuring a current as a function of time; and

    determining a current drop time based on the current as a function of time, wherein the current drop time corresponds to the fill time of the sample.

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