Device having a flow channel

G - Physics – 01 – N

Patent

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Details

G01N 33/487 (2006.01) B01L 3/00 (2006.01) C12Q 1/00 (2006.01) G01N 27/403 (2006.01)

Patent

CA 2501693

A device having a flow channel (14), wherein at least one flow-terminating interface (122) is used to control the flow of liquid in the flow channel. The flow-terminating interface (122a) prevents the flow of the liquid beyond the interface. In one aspect, the invention provides a sensor (100), such as, for example, a biosensor, in the form of a strip, the sensor being suitable for electrochemical or optical measurement. The sensor comprises a base layer (102) and a cover layer (116), and the base layer is separated from the cover layer by a spacer layer (112). The base layer (102), cover layer (116), and spacer layer (112) define a flow channel (114) into which a liquid sample is drawn therein and flows therethrough by means of capillary attraction. The flow of the sample is terminated by a flow-terminating interface (122a) positioned in the flow channel.

La présente invention concerne un dispositif à canal d'écoulement dans lequel au moins une interface de limite d'écoulement sert à réguler le début de liquide dans le canal d'écoulement. En l'occurrence, l'interface de limite d'écoulement empêche l'écoulement du liquide au-delà de l'interface. Par l'un de ses aspects, l'invention constitue une sonde telle que par exemple une sonde biologique, sous forme d'une bande, la sonde convenant à des mesures électrochimiques ou optiques. La sonde comporte une couche de base et une couche de couverture séparées l'une de l'autre par une couche intercalaire. Ces trois couches définissent un canal d'écoulement dans lequel un échantillon liquide est attiré et par lequel il s'écoule par capillarité. L'écoulement de l'échantillon est restreint par une interface limite d'écoulement disposée dans le canal d'écoulement.

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