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System and method for detecting used and dried sensors

  • US 9,164,056 B2
  • Filed: 08/31/2012
  • Issued: 10/20/2015
  • Est. Priority Date: 07/27/2012
  • Status: Active Grant
First Claim
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1. A method for detecting reuse of a test strip in a biosensor, the method comprising:

  • inoculating a test strip with a liquid, the test strip having a dry reagent and a plurality of electrodes including a bare electrode which is not in contact with the dry reagent in an unused condition of the test strip, the inoculating step being performed so that the liquid contacts the dry reagent, the bare electrode and one or more other electrodes;

    while the electrodes are in contact with the liquid, applying an electrical potential between the bare electrode and one or more of the other electrodes;

    measuring a current flow between the bare electrode and one or more of the other electrodes responsive to application of the potential; and

    determining, based on one or more parameters of the measured current flow, whether the test strip is one that has been previously wetted and dried before the inoculating step.

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