Fluid-flow control device

G - Physics – 01 – N

Patent

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Details

G01N 33/558 (2006.01) G01N 33/543 (2006.01)

Patent

CA 2386093

The present invention resides in one aspect in an assay device for an analyte comprising a flow path (22, 23, 24) for a liquid defined by interstices in a porous medium (20), at least one liquid flow barrier (26) which is impregnated into and immobilised on the porous medium (20) at a location in the flow path (22, 23, 24), at least one barrier release means (27) which is impregnated into the porous medium (20), and an analyte capture region (28a) in the flow path (22, 23, 24). The barrier release means (27) is soluble in the liquid, and, in use, is moveable by liquid flowing in the flow path (22, 23, 24) into contact with the flow barrier (26) so as to permit liquid flow through said location. Preferably, an analyte visualising agent is provided at a zone (29) in the flow path (22, 23, 24), said visualising agent being capable of interacting with the analyte to indicate the presence of the analyte.

La présente invention concerne un dispositif de dosage d'un analyte comportant un circuit d'écoulement (22, 23, 24) d'un liquide délimité par des interstices dans un milieu poreux (20), au moins une barrière d'écoulement de liquide (26) imprégnée dans et immobilisée sur le milieu poreux (20) à un site donné dans le circuit d'écoulement (22, 23, 24),au moins un moyen (27) pour libérer la barrière imprégné dans le milieu poreux (20), et une zone de capture d'analyte (28a) dans le circuit d'écoulement (22, 23, 24). Le moyen de libération de la barrière (27) est soluble dans le liquide, et, lors de son fonctionnement, peut être déplacé par le liquide s'écoulant dans le circuit d'écoulement (22, 23, 24) pour venir en contact avec la barrière d'écoulement (26) afin de permettre l'écoulement de liquide à travers ledit site. De préférence, il est prévu un agent de visualisation d'analyte capable d'interagir avec l'analyte pour signaler la présence de l'analyte.

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