lateral flow analysis device that has flow constrictions

摘要

"side flow analyzer having flow constrictions", as it relates to a side flow analyzer including a substrate having a sample addition zone and a downstream wash addition zone thereto of a fluid flow path through which a sample flows. The fluid flow path is configured to receive a flushing fluid in the flushing addition zone. a hydrophilic surface is arranged in the wash addition zone. Flow constriction (s) are spaced from the fluid flow path and arranged to define, with the hydrophilic surface, a reservoir configured to retain the flushing fluid by forming a meniscus between the hydrophilic surface and the constriction (s). flow (s). The fluid flow path drains the flushing fluid from the reservoir by capillary pressure. Also described are apparatus for analyzing a fluid sample and methods for displacing a fluid sample in a fluid flow path of an analysis device.