Analytical device for membrane-based assays

G - Physics – 01 – N

Patent

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Details

G01N 33/543 (2006.01) G01N 33/53 (2006.01) G01N 33/544 (2006.01)

Patent

CA 2285048

Methods of making analytical assay devices and methods of using the devices in analytical assays, such as immunoassays, are described. The analytical assay device comprises a liquid-impervious top support layer (10) that defines a rim (12) around an open port (11), and a porous reaction membrane (13) that is proximal to the top support layer (10), such that a portion of the upper surface (14) of the reaction membrane (13) and rim (12) define a sample receiving well (11). The upper surface (14) of the reaction membrane (13) is sealed to the lower surface of the top support layer (10) by a water-insoluble adhesive (19), which forms a liquid-impervious seal therebetween. An absorbent body (15) is proximal to and in liquid communication with the lower surface of the reaction membrane (13). The analytical assay device is used for the detection of a bindable target substance in a liquid sample potentially containing the target substance.

L'invention concerne des procédés de fabrication de dispositifs de tests analytiques, ainsi que des procédés d'utilisation de ces dispositifs au cours de tests analytiques, par exemple des essais immunologiques. Ce dispositif de tests analytiques comprend une couche supérieure de support imperméable au liquide (10), définissant une bordure (12) autour d'un orifice (11); ce dispositif comprend également une membrane poreuse réactionnelle (13), proche de ladite couche supérieure de support (10), de sorte qu'une partie de la surface supérieure (14) de la membrane réactionnelle (13) et de la bordure (12) définit un puits destiné à recevoir un échantillon (11). La surface supérieure (14) de ladite membrane réactionnelle (13) est hermétiquement fixée à la surface inférieure de ladite couche de support supérieure (10), par un adhésif non miscible à l'eau (19) formant un joint hermétique imperméable au liquide entre ces surfaces. Un corps absorbant (15), proche de la surface inférieure de la membrane réactionnelle(13), est en communication fluidique avec cette surface. Le dispositif de tests analytiques de cette invention est utilisé pour détecter une substance cible à pouvoir liant dans un échantillon liquide susceptible de renfermer cette substance.

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