Multi-layer reagent test strip
First Claim
1. A reagent test strip for use in an apparatus for measuring an analyte concentration in a biological fluid, comprising(a) a support having a top surface, a bottom surface opposite, and a through hole for passing a sample of the biological fluid, (b) a mesh, having a first surface adjoining the bottom surface of and covering the hole in, the support, and (c) a reagent matrix attached to a second surface of the mesh, opposite the first surface, the matrix comprising (i) a sample receiving surface for receiving the sample from the mesh and passing at least a portion of the sample toward a testing surface opposite to the receiving surface and (ii) a reagent for indicating the analyte concentration, by creating at the testing surface a change in reflectance that can be related to the analyte concentration;
- and (d) an adhesive layer; and
wherein the reagent matrix is attached to, and separated from, the second surface of the mesh by the adhesive layer such that a capillary gap is present between the mesh and the reagent matrix.
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Accused Products
Abstract
A reagent test strip for measuring an analyte concentration in a biological fluid has a spreading mesh sandwiched between a support and a reagent matrix. The support has a through hole that is covered by the mesh. In use, a sample of the fluid is applied through the hole in the support to the spreading mesh. The sample then passes through the mesh to the matrix, which contains a reagent that indicates the analyte concentration by causing a corresponding change in reflectance at its free surface. Optionally, an adhesive layer attaches the mesh, and optionally the matrix as well, to the support.
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Citations
20 Claims
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1. A reagent test strip for use in an apparatus for measuring an analyte concentration in a biological fluid, comprising
(a) a support having a top surface, a bottom surface opposite, and a through hole for passing a sample of the biological fluid, (b) a mesh, having a first surface adjoining the bottom surface of and covering the hole in, the support, and (c) a reagent matrix attached to a second surface of the mesh, opposite the first surface, the matrix comprising (i) a sample receiving surface for receiving the sample from the mesh and passing at least a portion of the sample toward a testing surface opposite to the receiving surface and (ii) a reagent for indicating the analyte concentration, by creating at the testing surface a change in reflectance that can be related to the analyte concentration; - and
(d) an adhesive layer; and
wherein the reagent matrix is attached to, and separated from, the second surface of the mesh by the adhesive layer such that a capillary gap is present between the mesh and the reagent matrix. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification