Volume-independent diagnostic test carrier and methods in which it is used to determine an analyte
First Claim
1. A diagnostic test carrier for the determination of an analyte in a liquid sample, comprisinga supporting layer;
- at least one detection layer which contains reagents to determine an analyte in a liquid sample, and which detection layer is located on the supporting layer;
a network which covers the at least one detection layer and is larger than the at least one detection layer such that the network extends beyond the at least one detection layer to the supporting layer, to which supporting layer the network is attached, wherein the network is hydrophilic but essentially not capillary active; and
a cover located over areas of the network which extend beyond each detection layer to define at least one sample application site which is not covered by the cover in the region of the network that covers the at least one detection layer;
wherein the network defines a capillary gap between the cover and the at least one detection layer, and the cover and the supporting layer, for the removal of excess liquid.
1 Assignment
0 Petitions
Accused Products
Abstract
The present invention concerns a diagnostic test carrier (1) containing a supporting layer (2) with a detection layer (3) arranged thereon containing the reagents required to determine analyte in a liquid sample and a network (4) covering the detection layer (3) which is larger than the detection layer (3) and which is attached to the supporting layer (2), which is characterized in that the network (4) is hydrophilic but not capillary active on its own and an inert cover (5) made of sample-impermeable material is arranged over the areas (6) of the network that extend beyond the detection layer in such a way that a sample application site (7) remains free on the region of the network (4) covering the detection layer as well as the use of such a test carrier for the determination of analyte in a liquid. In addition the invention concerns a method for the determination of an analyte in a liquid sample with the aid of a test carrier according to the invention.
127 Citations
40 Claims
-
1. A diagnostic test carrier for the determination of an analyte in a liquid sample, comprising
a supporting layer; -
at least one detection layer which contains reagents to determine an analyte in a liquid sample, and which detection layer is located on the supporting layer; a network which covers the at least one detection layer and is larger than the at least one detection layer such that the network extends beyond the at least one detection layer to the supporting layer, to which supporting layer the network is attached, wherein the network is hydrophilic but essentially not capillary active; and a cover located over areas of the network which extend beyond each detection layer to define at least one sample application site which is not covered by the cover in the region of the network that covers the at least one detection layer; wherein the network defines a capillary gap between the cover and the at least one detection layer, and the cover and the supporting layer, for the removal of excess liquid. - 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. A diagnostic test carrier for the determination of an analyte in a liquid sample, comprising
a supporting layer; -
at least one detection layer which contains reagents to determine an analyte in a liquid sample, and which detection layer is located on the supporting layer; a network which covers the at least one detection layer and is larger than the at least one detection layer such that the network extends beyond each detection layer to the supporting layer, to which supporting layer the network is attached, wherein the network is hydrophilic but essentially not capillary active; and a cover located over areas of the network which extend beyond each detection layer to define at least one sample application site which is not covered by the cover in the region of the network that covers the at least one detection layer; wherein the network defines a capillary gap between the cover and the detection layer, and between the cover and the supporting layer, for the removal of excess liquid; and wherein the detection layer comprises a transparent foil having a bottom foil side defining the detection side of the detection layer, and a top non-foil side, wherein a first film layer is applied to the top non-foil side and a second film layer is applied thereon, wherein the first film layer while in a wet state scatters light less than the second film layer scatters light. - View Dependent Claims (25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36)
-
-
37. A method of determining an analyte in a liquid sample, using a diagnostic test carrier comprising a supporting layer, at least one detection layer containing at least one reagent, wherein the at least one detection layer is located on the supporting layer, a network which covers the at least one detection layer and is larger than the at least one detection layer such that the network extends beyond the at least one detection layer to the supporting layer, to which supporting layer the network is attached, and wherein the network is hydrophilic but essentially not capillary active, a cover located over areas of the network which extend beyond each detection layer to define at least one sample application site which is not covered by the cover in the region of the network that covers each detection layer, wherein the network defines a capillary gap between the cover and the detection layer, and between the cover and the supporting layer, for the removal of excess liquid, comprising
applying the liquid sample at the at least one application site to the network, to pass the liquid sample through the network, and remove the excess sample by capillary action, wherein the liquid sample contacts at least one detection layer, to produce a detectable signal in the detection layer from the reaction of the sample with the reagents; - and
detecting the signal. - View Dependent Claims (38, 39, 40)
- and
Specification