CARDIOPULMONARY BYPASS WITH NIKKISO AND BIOMEDICUS CENTRIFUGAL PUMPS

In our department, a new compact and atraumatic centrifugal pump, Nikk iso, was developed as a second-generation cardiopulmonary bypass pump. To assess and confirm the function and controllability of this pump, comparative studies of cardiopulmonary bypass with Nikkiso and BioMedi cus centrifugal pumps were performed using calves. Both pumps provided pump flows of 60-70 ml/kg/min without incidence. The hemodynamics of both groups were stable and within the normal range, and no leakage or thrombus formations were observed in either pump. All hematology and biochemistry data showed no significant differences between the two gr oups. Plasma free hemoglobin values of the Nikkiso pump tended to be l ower than those of the BioMedicus pump. The Nikkiso pump was easy to h andle because of its smaller size, and air removal was easily performe d because of its low priming volume. The Nikkiso pump demonstrated eas y manipulation and good controllability. This compact, atraumatic cent rifugal pump meets the requirements for a second-generation cardiopulm onary by-pass pump.