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Dual path immunoassay device

  • US 7,682,801 B2
  • Filed: 03/08/2007
  • Issued: 03/23/2010
  • Est. Priority Date: 03/11/2005
  • Status: Active Grant
First Claim
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1. A test device for use with a solution and for use with a conjugate having a marker for determining the presence of a ligand in a liquid sample, the test device comprising:

  • a) a first sorbent strip having a first location for receiving a solution and defining a first migration path for the solution and the conjugate;

    b) a second sorbent strip distinct from said first sorbent strip having a second location for receiving the liquid sample and defining a second migration path for the sample distinct from said first migration path; and

    c) a test site located on or in said first sorbent strip and/or said second sorbent strip, said test site having an immobilized ligand-binding mechanism, and said first and second sorbent strips touching each other at the test site, and said second migration path extending laterally from said second location to at least said test site such that application of the liquid sample to the second location requires time for the liquid sample to laterally flow to the test site and does not immediately wet the test site upon application.

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