| 摘要 |
A cannula system for a biventricular cardiac support system or a cardiopulmonary bypass system wherein a first cannula having a pair of side-by-side lumens is adapted to be positioned within the left atrium and left ventricle and aorta of a patient. Blood from the left atrium and left ventricle drains into one of the lumens in the first cannula and is conveyed to the inlet of a pulsatile flow cardiopulmonary bypass pump from where it is pumped through the other lumen into the aorta of the patient. An inflatable balloon is provided at the distal end of the first cannula for holding the distal end of the cannula in the aorta above the aortic valve, The first cannula includes an axially extending bore communicating with a space in the aorta between the inflated balloon and the aortic valve for conveying cardioplegic solution to the space communicating with the left and right arteries of the patient. A second cannula having a pair of side-by-side lumens is adapted to be positioned within the right atrium and right ventricle and pulmonary artery of the patient. Blood from the right atrium and right ventricle flows into one of the lumens in the second cannula and is conveyed to the pulsatile flow cardiopulmonary bypass pump from where it is pumped through the other lumen into the pulmonary artery of the patient. |
