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Electrochemical biosensor test strip

  • US 5,762,770 A
  • Filed: 06/30/1995
  • Issued: 06/09/1998
  • Est. Priority Date: 02/21/1994
  • Status: Expired due to Term
First Claim
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1. A device for detecting or measuring the concentration of an analyte, comprising:

  • a first electrical insulator;

    two electrodes only said electrodes consisting of a working electrode and a counter electrode of substantially the same size, made of the same electrically conducting materials and supported on the first electrical insulator;

    a second electrical insulator, overlaying the first electrical insulator and the electrodes and including a cutout portion that exposes a smaller surface area of the counter electrode than the working electrode;

    a reagent for detecting or measuring the concentration of the analyte, the reagent substantially covering the exposed electrode surfaces in the cutout portion; and

    a spreading mesh, impregnated with a surfactant, overlaying the cutout portion and affixed to the second electrical insulator,wherein the cutout portion and spreading mesh are of sufficient size and the reagent is in sufficient amount to receive a minimum whole blood sample of about 9 microliters for analyzing the analyte.

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