A - Human Necessities – 61 – M
Patent
A - Human Necessities
61
M
128/81, 341/38.4
A61M 1/00 (2006.01) A61M 5/00 (2006.01)
Patent
CA 1209672
ABSTRACT An extracorporeal blood circulation system including a line for withdrawing the venous blood from the patient, an artificial lung provided on the line, a reservoir for the blood withdrawn, a blood supply line for sending out the blood from the reservoir to the artery of the patient, and a blood supply pump provided on the blood supply line and serving as an artificial heart. The amount of blood to be supplied is automatically control- led to maintain the arterial pressure of the patient in a suitable required range. The blood supply pump is stopped when the arterial pressure of the patient measured is above a predetermined upper limit value, while the pump is driven when the arterial pressure has lowered to a level below a lower limit value. The system has means for generating a trigger pulse upon detecting contraction of the heart of a patient for spontaneous circulation, a circuit for generating a trigger pulse in accordance with a heart rate set for forced circulation, means for selecting one of the trigger pulses, and means for driving the pulsatile pump in response to the selected trigger pulse.
452929
Fetherstonhaugh & Co.
Hino Tsunekazu
Omron Tateisi Electronics Co.
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