Diagnostic sanitary test strip

Details Diagnostic sanitary test strip Diagnostic sanitary test strip

1997-06-10

2000-03-21

Chin, Christopher L.

Chemistry: analytical and immunological testing

Involving diffusion or migration of antigen or antibody

422 55, 422 56, 422 58, 422 61, 435 11, 435 14, 435174, 435180, 4352871, 4352872, 4352577, 4352878, 4352879, 435805, 435810, 435970, 436 66, 436 71, 436164, 436169, 436170, 436518, 436531, 436805, 436810, 436815, 436827, G01N 33558

Patent

active

060401958

ABSTRACT:
An improved multi-layered diagnostic sanitary test strip for receiving a heterogenous fluid, such as whole blood, to test for presence and/or amount of a suspected analyte in the fluid by facilitating a color change in the strip corresponding to the amount of the analyte in the fluid, wherein the test strip includes fluid volume control dams to prevent spillage of the fluid from the strip and a chemical reagent solution that facilitates end-point testing. The improved test strip comprises (a) an upper support strip having a fluid receiving port and (b) a lower support strip having a color change viewing port and securely sandwiched therebetween (c) a spreading mesh screen for uniformly distributing the fluid, (d) a chemically treated separating layer for removing an undesirable element, e.g. red blood cells, from the fluid received from the mesh screen, (e) an isotropic membrane chemically treated with a reagent indicator solution for removing any remaining portions of the undesirable element, producing a color change proportionate to the amount of the suspected analyte in the fluid and facilitating an end-point ramp test, and (f) volume control dam partitions for retaining fluid on and in the strip.

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