Abstract

In 34 infants who underwent open heart surgery in our hospital, more effective pulsatile flow was obtained with a pump of NIKKISO Model pp-11, which is a newly designed pulsatile pump with hydraulic drive system by lchinose, NIKKISO Co.. But this pump was sometimes against the patient's own pulse in partial cardiopulmonary bypass, for this pump was only manually controlld. To aboid this fighting in partial bypass, a ECG triggered rate control system (syncronizer) was newly introduced. This system made it possible to effectively assist the patient's circulation with the pulsatile pump in partial cardiopulmonary bypass.