Multi-layer reagent test strip
AssigneeLifeScan, Inc.
InventorsKoon-wah Leong, Yeung Siu Yu, Edward Gray Rice
Life of this patent
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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.
Claims20
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.
Dependencies are inferred from the claim text.