Patent ID: 8728398

Claim:
A fluid flow cell for use in analysis of fluid samples, the flow cell comprising: a) a housing having a number of fluid-guiding surfaces forming the housing and a fluid flow path through the housing; b) at least one fluid inlet disposed in one of the fluid-guiding surfaces along the fluid flow path; c) at least one fluid outlet disposed in one of the fluid-guiding surfaces along the fluid flow path and spaced from the at least one fluid inlet; d) a first reagent inlet port disposed in one of the fluid-guiding surfaces along the fluid flow path; e) a first reagent evacuation port disposed in one of the fluid-guiding surfaces along the fluid flow path immediately downstream from the first reagent inlet port; and f) a detection substrate disposed within the housing along the fluid flow path and spaced from the first reagent inlet port and the first reagent evacuation port, wherein the detection substrate is located within the housing along the fluid flow path between the first reagent evacuation port and the at least one fluid outlet.