| 摘要 |
PROBLEM TO BE SOLVED: To provide a centrifugal type blood pump apparatus having a restoring force relative to a radial movement due to oscillation from the outside an impeller. SOLUTION: This centrifugal type blood pump apparatus 1 is provided with the impeller 21 having a magnetic substance 25, rotating inside a housing 20 and sending liquid; an impeller rotating torque generation part 3 attracting and rotating the magnetic substance 25 of the impeller 21; a dynamic pressure groove 38 provided inside the housing 20 on the side of the impeller rotating torque generation part; a second permanent magnet 41 attracting the impeller in the opposite direction to the attracting direction by the impeller rotating torque generation part 3; and a third permanent magnet 42 disposed adjacent to the second permanent magnet 41 on the outer circumferential side or the central side of the impeller relative to the disposed position of the second permanent magnet and having a polarity repelling the permanent magnet 29 of the impeller 21. COPYRIGHT: (C)2006,JPO&NCIPI
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