| 摘要 |
The equipment comprises an impulsion pump (5-5') with a displaceable piston (7), that adopts a bellows shape, located in the inside of the same, the chamber of the pump receiving the patient's venous blood from a reservoir (4). In the communication (16) between the reservoir and the chamber a float valve (17) has been provided for, a valve that closes the passage when the piston (7) impels the blood through a nozzle (15), passing through a valve (22), then through a heat exchanger (28) and then through an oxygenator (29) from which the oxygenated blood is sent once again to the patient. The shaft (9) of the nozzle (7) is operated by a mechanism (14) that transforms the rotating and alternate movements of a servomotor (12) into linear movements, the operation of this servomotor (12) being controllable by means of an automaton, permitting a pulsatile blood flow to be provided with adjustable flow and frequency. The equipment forms a disposable fungible unit, used to substitute the pumping action of the heart of a patient, when he is subjected to heart surgery or ventricular assistance. <IMAGE> |
