| 摘要 |
1. "PULSATILE PUMP FOR EXTRA-CORPOREAL CIRCULATION" A pulsatile pump for extracorporeal circulation in cardiosurgery is disclosed, which is constituted by a housing chamber inside which a length of an elastic hose is inserted, which chamber is fitted with two squeeze valves, one of which is for suction (mitral valve) and the other of which is for delivery (aortic valve), and with an electro-pneumatically actuated plate (or pusher) which, in the systolic step (ejection) partially compresses the hose carrying out a rototranslational movement and, in the diastolic step (filling) goes away from the hose, with an analogous movement, allowing the same hose to relax. A microprocessor-control system makes it possible the pump to operate, besides in manual mode and in automatic mode, also in syntony with the patient's ECG. |
