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Test strip for measuring analyte concentration over a broad range of sample volume

  • US 20020106711A1
  • Filed: 03/28/2002
  • Published: 08/08/2002
  • Est. Priority Date: 08/28/1989
  • Status: Active Grant
First Claim
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1. A test strip, suitable for determining the concentration of an analvte in a body fluid, which comprises:

  • a cover sheet, having an elongated window cut through it;

    a lamellar membrane adjacent to the cover sheet, extending across and into the window and containing a reagent that reacts with the analyte to produce a color change;

    a porous sheet in fluid communication with the membrane, having a pillow portion and a compressed portion, the pillow portion being substantially aligned with the window; and

    a backing sheet, adjoining the porous sheet and having a sample port cut through it;

    whereby fluid introduced into the sample port can flow to the membrane, and analyte in the fluid can react with the reagent to produce a color change visible through the window.

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