US Patent 7214210 Cassette and method for drug preparation and delivery

A disposable cassette for mixing an intravenous drug in a vial to a patient includes a liquid inlet for connection to a liquid supply, a first vial spike, a second vial spike and a chamber. The chamber, the first and second vial spikes, and the liquid inlet are in fluid communication with each other. A valve mechanism may be actuated to control flow between the chamber, the vial receptacles and the liquid inlet.