Membrane strip biosensor system for point-of-care testing

Details Membrane strip biosensor system for point-of-care testing Membrane strip biosensor system for point-of-care testing

2007-11-27

2007-11-27

Nguyen, Bao-Thuy L. (Department: 1641)

Chemistry: analytical and immunological testing

Involving diffusion or migration of antigen or antibody

C436S518000, C436S169000, C436S170000, C436S810000, C436S808000, C436S823000, C422S051000, C422S051000, C422S067000, C422S082020, C204S403010, C204S403030, C204S403050

Reexamination Certificate

active

10827884

ABSTRACT:
The present invention relates to a biosensor for point-of-care testing (POCT) whose detection sensitivity was remarkably improved by introducing to membrane strip chromatographic assay system a successive cross-flow procedure for immune reaction and enzymatic reaction. The present invention relates to a membrane strip biosensor system that comprises(a) a membrane pad (10) for sample application,(b) a membrane pad (20) for release of detection binding component, wherein the membrane pad (20) contains label-linked binding component for detection in a dry state,(c) a signal generation membrane pad (30) with immobilized binding component for capture,(d) a membrane pad (40) for absorption of vertical flow medium,(e) a membrane pad (50) for the supply of substrate solution for enzyme,(f) a membrane pad (60) for absorption of horizontal flow medium and(g) substrate solution,wherein the system has a cross-arrangement of two groups of the membrane pads,(I) one group of vertically arranged pads, wherein the pad (10) is partially superimposed and fixed in length at the end of the pad (20), and the pad (20) and the pad (40) are partially superimposed and fixed in length at the both ends of the signal generating membrane pad (30), respectively; and(II) the other group of horizontally arranged pads, wherein the pad (50) and pad (60) are, at the time of signal generation, partially superimposed and fixed at the both lateral sides of the signal generation membrane pad (30), respectively.

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