Assay devices comprising a porous capture membrane in fluid-withdrawing contact with a nonabsorbent capillary network
First Claim
1. A device for performing a heterogeneous assay, comprising:
- (a) a porous member having (i) a means for physically entrapping at least one target ligand on said porous member from a fluid sample in at least one zone and (ii) a means for detecting the presence or amount of said target ligand as a result of the assay process; and
(b) a first nonabsorbent member in fluid communication with said porous member, said first nonabsorbent member forming at least one capillary with said porous member so that when sample, alone or in combination with other fluids, is added to said porous member, fluid is drawn through said porous member.
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Accused Products
Abstract
Devices for use in heterogeneous ligand-receptor assays, having a porous member in contact with a nonabsorbent textured surface, where the surface texturing is such that a capillary network is formed when in fluid communication with the porous member. More particularly, these devices comprise:
(a) a porous member having (i) at least one binding agent capable of immobilizing at least one target ligand on the porous member from a fluid sample in at least one zone and (ii) a means for detecting the presence or amount of said target ligand as a result of the assay process; and
(b) a nonabsorbent member in fluid communication with the porous member, the nonabsorbent member forming at least one capillary with the porous member so that when sample, alone or in combination with other fluids, is added to the porous member, fluid is drawn through the porous member.
114 Citations
18 Claims
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1. A device for performing a heterogeneous assay, comprising:
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(a) a porous member having (i) a means for physically entrapping at least one target ligand on said porous member from a fluid sample in at least one zone and (ii) a means for detecting the presence or amount of said target ligand as a result of the assay process; and
(b) a first nonabsorbent member in fluid communication with said porous member, said first nonabsorbent member forming at least one capillary with said porous member so that when sample, alone or in combination with other fluids, is added to said porous member, fluid is drawn through said porous member. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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Specification