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Device for self contained solid phase immunodiffusion assay

  • US 4,770,853 A
  • Filed: 12/03/1986
  • Issued: 09/13/1988
  • Est. Priority Date: 12/03/1986
  • Status: Expired due to Term
First Claim
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1. A self-contained ligand receptor assay device, the combination comprising;

  • (a) collection means having an elongated shaft with an absorbent tip for collecting a specimen;

    (b) a tube, cooperative with said collection means, said tube having an interior, an open end and a distal end;

    (c) at least one sealed chamber in said tube;

    (d) a number of reagents equal to the number of said at least one chamber located one reagent in each of said at least one chamber;

    (e) means to seal each said reagent in a respective one of said at least one chamber;

    (f) said seal means comprising frangible seals;

    (g) ligand receptor reaction means including at least one porous membrane;

    (h) means forming a hole in said tube in predetermined spaced relation to said distal end thereof;

    (i) means fixing said ligand receptor reaction means to said tube covering said hole with said least one porous membrane exposed to said interior of said tube; and

    (j) the length of said shaft being such as to permit said absorbent tip to reach through all of said at least one chamber to mix all of said at least one reagent and to permit fluid diffusion between said tip and said at least one membrane;

    whereby(k) a labelled ligand or a labelled receptor is immobilized on said ligand receptor reaction means and the result of said assay can be examined.

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