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Capillary flow device

  • US 4,963,498 A
  • Filed: 01/15/1988
  • Issued: 10/16/1990
  • Est. Priority Date: 08/05/1985
  • Status: Expired due to Term
First Claim
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1. A method for determining the presence of amount of an analyte in, or a property of, a fluid sample, comprising:

  • applying said sample to device comprising an entry port for said sample, a vent, a capillary pathway connecting said entry port to said vent, and a reagent in said capillary pathway, wherein said sample flows through said capillary pathway under the sum of gravitational and capillary forces and interaction of said reagent with said sample modifies a characteristic of said sample associated with said flow;

    allowing said sample to interact with said reagent and traverse at least a portion of said capillary pathway;

    detecting said flow characteristic; and

    relating said flow characteristic to the presence or amount of said analyte in, or to said property of, said fluid sample.

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