BLOOD PUMP WITH SEPARATE MIXED-FLOW AND AXIAL-FLOW IMPELLER STAGES, COMPONENTS THEREFOR AND RELATED METHODS

摘要

A rotordynamic pump for delivering continuous flow of fluids, such as blood, is provided. In one embodiment, the pump includes a stator housing having an inlet (104) and an outlet (106). A rotor hub (108) is disposed within the stator housing having a first, mixed- stage impeller (116) and a second, axial -flow stage impellers (118). One or more stator vanes (120) and extend radially inwardly from the stator housing. In one particular embodiment, the second stage impeller is disposed nearer to the outlet than to the inlet. The stator vanes may include a first set of stator vanes disposed between the first and second stage impellers, and a second set of stator vanes positioned between the second stage impellers and the outlet.