Patent ID: 6531322
Filing Date: 2003-03-11
Classification: G01N,Y10T

Abstract:
A method for measuring a concentration of glucose in a sample of whole blood, comprising the steps ofa) providing a test strip that comprises (i) a two-sided spreading layer for accepting the blood sample on a first side and passing the sample to a second side, opposite: (ii) an intermediate layer comprising first and second membranes, substantially side-by-side, each having a top major surface adjoining the second side of the spreading layer to receive a part of the blood sample and each containing a reagent that can react with glucose in the sample, as it passes through the membrane, to cause a color change in the reagent, the second membrane further comprising an inhibitor and an inert dye, and (iii) a support layer to support the other layers and to permit any color changes in the membranes to be visible through it b) applying the blood sample to the spreading layer of the test strip, and c) determining the glucose concentration by comparing the colors of the first and second membranes with a calibration color chart.