| 摘要 |
The blood pump comprises a pump casing (10) in which an impeller (16) is installed without any bearing. Said impeller (16) is rotated via a magnetic coupling (32,36) by an external magnetic driving means (33). The impeller is radially centered via the magnetic coupling (32,36). The lower side (30) of the blades (19) of the impeller is configured as supporting surface (30) sloping towards the trailing end. In this way a hydrodynamical supporting effect is attained during rotation such that the impeller (16) raises from the bottom surface (12) of the pump casing (10). Since no bearings and sealings are provided on the pump casing the danger of thrombosis and the danger of penetration of foreign bodies in the form of abrasive particles into the blood is reduced.
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