Patent ID: 7220595

Claim:
An immunoassay cassette for use in detecting an analyte in a liquid body fluid sample, comprising: (a) a cassette body having a sample well for receiving said sample; (b) carried on said body, (i) a reservoir containing a first reagent composition effective to react with one or more sample components to form a modified sample, when sample migrates from the sample well into the reservoir; (c) a support mounted on said body, for movement toward and away from a transfer position; and (d) carried on said support, a reagent strip containing a second reagent composition effective to react with the modified sample formed in said reservoir to form a detectable analyte-dependent product, said strip having a transfer zone which is brought into contact with said reagent reservoir, when the support is moved to its sample-transfer position, and a detection zone located downstream of the transfer zone, wherein controlled movement of said support toward and away from its transfer position is effective to meter the volume and rate of sample flow from the reservoir to the reagent strip.