Flow control system for diagnostic assay system

A disposable cartridge for use in combination with a diagnostic assay system, comprising:

• a cartridge body defining a syringe barrel having a barrel port operative to inject and withdraw assay fluids in response to the displacement of a syringe plunger;
• a rotor comprising a plurality of assay chambers rotatable about an axis, the rotor defining a plurality of ports disposed about a peripheral surface, each port disposed in fluid communication with at least one of the assay chambers;
• a flow control system between the barrel and rotor ports preventing cross-contamination of fluid sample reagents from one assay chamber to another assay chamber;
• at least one of the ports of the flow control system including a high viscosity gel disposed in at least one of the rotor ports to contain fluid sample reagents in their respective chambers.