Experience with a variety of heart-lung machines, centrifugal pumps, IABP, implantable ventricular assist devices, intraoperative auto transfusion devices, blood saturation monitors, hemodynamic pressure transducers, ECMO, anticoagulation monitors, etc. This includes assembly and operation of the heart-lung machine and extracorporeal circuits, operation of heater, coolers and cardioplegia delivery system, also blood concentrators, coagulation monitors, and long -tern assist devices, etc.