[A newly designed parallel connecting tube makes feasible high speed blood transfusion with a transfusion pump]

Use of a transfusion pump (BP 101, Terumo, Tokyo) makes it feasible to obtain a stable and almost constant ejection volume at a flow rate of 99 ml.min-1, with no untoward effects of the intravenously placed needle and the microfilter located in the circuit. An air sensor ensures that the pump will cease operation immediately and automatically if an air bubble occurrs in the circuit. When a blood bag is conventionally connected to a connecting tube, at the maximum flow rate, one must set up a new blood bag within a few minutes, and in emergency situations with a shortage of hands, this would be unduly troublesome. When 5-7 blood bags (400 ml) is connected to 5-7 parallel connecting tubes, the pump will continuously eject blood approximately to 2000 ml at 99 ml.min-1, without replacing the blood bags.