Patent ID: 7500962

Claim:
A medical fluid apparatus, comprising: a diaphragm pump for pumping a medical fluid; an inlet of the diaphragm pump, connected to a source of the medical fluid; a piston in the diaphragm pump connected to a membrane in the diaphragm pump, the membrane forming a chamber within the diaphragm pump; a valve manifold connected to the chamber by a single inlet/outlet port; a source of the medical fluid connected to the valve manifold; a sensor for sensing air in the medical fluid or in the chamber; an outlet of the pump valve manifold connected to a patient, wherein if no air is detected, the medical fluid is pumped to the patient by extending the piston connected to the membrane; and an entrained air destination connected to the outlet of the pump valve manifold, the entrained air destination different from the patient, wherein if air is detected, the medical fluid is pumped to the entrained air destination by extending the piston.