Abstract
We have developed percutaneous right ventricular assist system (PRVAS) recently. Furthermore, we worked out percutaneous biventricular assist system (PBVAS) by associating percutaneous left ventricular assist system (PLVAS) with PRVAS. Six adult dogs underwent general anesthesia. Each cannula of the PRVAS and PLVAS was inserted percutaneously. The dogs were induced ventricular fibrillation electricaly. Then we confirmed that we could maintain circulation by PBVAS. To clarify the effectiveness of PRVAS in condition of biventricular failure, we measured the change of circulatory dynamics, renal surface blood flow, renal venous flow and renal oxygen consumption before and after PRVAS assistance. It was difficult to maintain circulation with PLVAS alone. During PRVAS assistance and after restarting of PRVAS, mean aortic pressure and renal venous flow remained at almost control level. But renal surface blood flow and renal oxygen consumption did not completely recover to control level 20 minutes after PRVAS had been restarted.
