HEMODYNAMICS IN BIDIRECTIONAL ARTERIAL PERFUSION DURING AORTIC ARCH ANEURYSM SURGERY

Abstract

To clarify the hemodynamics in a bidirectional arterial perfusion, experimental circuit was provided with two arterial cannulation sites and one drainage cannula with pump-oxygenator. The glass window method and electro-magnetic flow meter were used to define the colliding portion of the bidirectional blood flow in just distal aorta to left subclavian artery under the total cardiopulmonary bypass. Under the normothermia, the blood flow of the femoral artery and axillary artery were in the ratio of 63% to 37%, and changed 41% to 59% at the 25°C. On the contrary, the ratio returned to the normothermic level, during the early rewarming phase. The systemic vascular resistance of the upper and lower part of the body, changed significantly during cooling and rewarming phase.