抄録
A newly developed pulsatile roller pump for an advanced cardiopulmonary bypass system, which is specially designed for infants, is described. The pump is driven by a stepping motor under the precise control of a microcomputer, so that heart rate, cardiac output, tidal volume and S/D (Systolic to Diastolic) ratio for pulsatile flow perfusion can be set as desired. The pump can run either by an internal trigger or by an external trigger from the electrocardiogram or arterial pressure to allow synchronized counterpulsation. It is also possible to drive the pump as a conventional roller pump, delivering nonpulsatile blood flow. Results of testing the pulsatile roller pump with in-vivo (rabbit) experiments are presented.
