Patent ID: 7439033
Filing Date: 2008-10-21
Classification: A61B,C12Q,G01N,Y10T

Abstract:
1. A method for determining analyte concentration in a fluid sample, the method comprising the acts of: (a) providing a test strip having a sample side and a reaction side, the test strip including a porous membrane, the test strip being adapted to accept a sample on the sample side and pass it towards the reaction side, said test strip including a testing reagent, said testing reagent comprising a color indicator system that changes color to indicate the presence of the analyte in the sample, said test strip further having a polymer on at least the reaction side, said polymer increasing the opacity of at least a portion of the test strip after contact with a sample, said polymer being selected from the group consisting of acrylic latex polymers, polystyrene sodium sulfate polymers, and combinations thereof; (b) applying the sample to the sample side of the test strip; and (c) measuring the change in color of the testing side to determine the analyte concentration of the sample.