Rapid assay device
First Claim
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1. An apparatus for use in immunoassay procedures consisting essentially of:
- (A) a housing comprising a reservoir member and a base member, said reservoir member defining a cavity, said base member engaging said reservoir member to enclose said cavity, and having(i) a first surface on said reservoir member facing away from said cavity and a second surface on said reservoir member facing into said cavity;
(ii) an aperture providing an opening through both of said first and second surfaces,(iii) a first profile provided on said first surface around said aperture,(iv) at least one vent hole,(v) a second profile facing said cavity provided on said second surface around said aperture;
(B) a single porous foam member provided in said cavity, wherein a surface of said foam member is deformable by said second profile to produce a depression that surrounds an area on said surface of said foam member; and
(C) a reagent-binding member provided on said surface of said member, wherein no external means to direct the flow of sample and reagents within said apparatus is required.
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Abstract
A rapid immunoassay device comprising a single porous membrane that serves as both a reagent support and a spent reagent reservoir is disclosed. The immunoassay device directs the flow of sample and reagents within the device in a manner that eliminates both lateral diffusion and backflow of reagents without the necessity of additional external means.
48 Citations
28 Claims
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1. An apparatus for use in immunoassay procedures consisting essentially of:
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(A) a housing comprising a reservoir member and a base member, said reservoir member defining a cavity, said base member engaging said reservoir member to enclose said cavity, and having (i) a first surface on said reservoir member facing away from said cavity and a second surface on said reservoir member facing into said cavity; (ii) an aperture providing an opening through both of said first and second surfaces, (iii) a first profile provided on said first surface around said aperture, (iv) at least one vent hole, (v) a second profile facing said cavity provided on said second surface around said aperture; (B) a single porous foam member provided in said cavity, wherein a surface of said foam member is deformable by said second profile to produce a depression that surrounds an area on said surface of said foam member; and (C) a reagent-binding member provided on said surface of said member, wherein no external means to direct the flow of sample and reagents within said apparatus is required. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28)
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Specification