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Biosensor and method for hematocrit determination

  • US 5,385,846 A
  • Filed: 06/03/1993
  • Issued: 01/31/1995
  • Est. Priority Date: 06/03/1993
  • Status: Expired due to Term
First Claim
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1. An apparatus for measuring the hematocrit level of a blood sample, comprising:

  • (a) a first insulating substrate;

    (b) working and counter electrodes affixed to the first insulating substrate;

    (c) a second insulating substrate, which overlays the working and counter electrodes, has a window for exposing a portion of the working and counter electrodes, and has a cut out portion at one end to allow contact between the electrodes and a meter and a power source; and

    (d) a porous substrate, which is impregnated with an electroactive compound, overlays the window, and is spatially displaced from the working and counter electrodes so that there is an empty space between the working and counter electrodes and the porous substrate prior to addition of the blood sample to the apparatus.

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