Visually-readable reagent test strip

C - Chemistry – Metallurgy – 12 – Q

Patent

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Details

C12Q 1/54 (2006.01) C12M 1/34 (2006.01) C12M 1/40 (2006.01) C12Q 1/28 (2006.01) G01N 33/52 (2006.01) G01N 33/558 (2006.01)

Patent

CA 2226069

A multilayer reagent test strip measures the concentration of analyte in a liquid sample that is applied to it. The sample is guided to a number of assay areas arrayed along the strip, where the analyte can react with a reagent to cause a color change. Each assay area also includes an inhibitor for the color-change reaction. The inhibitor concentration increases in successive assayareas; thus, the number of areas that change color is a measure of the analyte concentration. The test strip is particularly adapted for measuring glucose in awhole blood sample. In a preferred embodiment, the sample is guided to the assay areas along a path formed by crushing selected areas of a membrane, and the assay areas are uncrushed areas of the membrane.

Une bandelette réactive multicouches sert à mesurer la concentration d'un analyte dans un échantillon liquide appliqué sur la bandelette. L'échantillon est guidé vers un certain nombre de compartiments d'analyse disposés le long de la bandelette, dans lesquels l'analyte peut réagir avec un réactif et provoquer un changement de coloration. Chaque compartiment d'analyse comprend également un inhibiteur de la réaction de changement de coloration. La concentration de l'inhibiteur augmente dans les compartiments d'analyse successifs; ainsi, le nombre de compartiments qui changent de coloration est une mesure de la concentration de l'analyte. La bandelette d'analyse est particulièrement adaptée à la mesure du glucose dans un échantillon de sang entier. Dans une application de choix, l'échantillon est guidé dans les compartiments d'analyse le long d'un trajet formé par l'écrasement de compartiments choisis dans une membrane et les compartiments d'analyse sont constitués par des compartiments non écrasés de la membrane.

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