Diagnostic devices and apparatus for the controlled movement of reagents without membranes
First Claim
1. An analytical device for determining the presence or amount of a target ligand in a test sample, said device comprising:
- one or more channels; and
an array of texture structures in fluid communication with at least one channel, each texture structure comprising a surface which comprises an immobilized ligand receptor covalently or non-covalently attached thereto, said immobilized ligand receptor capable of binding a target ligand,whereby when test sample containing target ligand flows through said channel(s), said target ligand diffuses across the width of said channel(s) and binds to said ligand receptor immobilized on said texture structure.
6 Assignments
0 Petitions
Accused Products
Abstract
The assay devices, assay systems and device components of this invention comprise at least two opposing surfaces disposed a capillary distance apart, at least one of which is capable of immobilizing at least one target ligand or a conjugate in an amount related to the presence or amount of target ligand in the sample from a fluid sample in a zone for controlled fluid movement to, through or away the zone. The inventive device components may be incorporated into conventional assay devices with membranes or may be used in the inventive membrane-less devices herein described and claimed. These components include flow control elements, measurement elements, time gates, elements for the elimination of pipetting steps, and generally, elements for the controlled flow, timing, delivery, incubation, separation, washing and other steps of the assay process.
283 Citations
44 Claims
-
1. An analytical device for determining the presence or amount of a target ligand in a test sample, said device comprising:
-
one or more channels; and an array of texture structures in fluid communication with at least one channel, each texture structure comprising a surface which comprises an immobilized ligand receptor covalently or non-covalently attached thereto, said immobilized ligand receptor capable of binding a target ligand, whereby when test sample containing target ligand flows through said channel(s), said target ligand diffuses across the width of said channel(s) and binds to said ligand receptor immobilized on said texture structure. - 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. An analytical device for determining a presence or amount of a ligand in a test sample, said device comprising:
-
an inlet port and a vent; one or more channels; an array of texture structures in fluid communication with at least one channel, each texture structure having a surface comprising an immobilized receptor covalently or non-covalently attached to said surface of said texture structure, said receptor capable of binding a ligand, whereby when said test sample containing a ligand flows through said channel(s), said ligand diffuses across the width of said channel(s) to bind said receptor immobilized on said texture structure; and
,a labeled reagent comprising a specific binding member conjugated to a detectable label, said labeled reagent capable of producing a signal at said receptor immobilized on said texture structure to indicate the presence or amount of a ligand in a test sample. - View Dependent Claims (27)
-
-
28. An assay device comprising:
-
a sample addition reservoir; a sample reaction barrier fluidly connected to said sample addition reservoir; a reaction chamber fluidly connected to said sample reaction barrier, said chamber having at least two fingers in walls thereof, wherein said barrier has a higher capillarity than said reaction chamber; a time gate fluidly connected to the reaction chamber, said time gate capable of permitting fluid to pass therethrough at a desire d flow rate; a diagnostic element fluidly connected to the time gate, said diagnostic element comprising an array of texture structures capable of immobilizing at least one conjugate in at least one zone; and
,a used reagent reservoir fluidly connected to said diagnostic element, whereby fluid can flow in sequence from said sample addition reservoir, to said barrier, to said reaction chamber, to said time gate, to said diagnostic element then to said used reagent reservoir. - View Dependent Claims (29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44)
-
Specification