Abstract
Blood pumps for the cardiopulmonary support system with ECMO (extracorporeal membrane oxygenation) need a higher pump head. Existing single stage centrifugal pumps can generate the higher pump head with higher rotational speed of the impeller. However, the large shear stress due to the higher rotational speed can occur and lead to hemolysis. In order to realize a blood pump with higher pump head, higher anti-hemolysis and thrombosis performances, the basic study on the development of unprecedented multistage blood pump was conducted. In consideration of the application of the blood pump for pediatric patients, miniature two-stage centrifugal blood pump with the impeller's diameter of 40mm was designed and the performance was examined in experiments and computations. Some improvements for a multistage blood pump with higher anti-hemolysis and thrombosis performances were suggested.
