| 摘要 |
In this centrifugal blood pump apparatus, one permanent magnet (15a, 15b) is provided in one surface of an impeller (10), a second permanent magnet (16a, 16b) is provided in an inner wall of a blood chamber (7), a third permanent magnet (50) is provided in the other surface of the impeller (10), and a fourth permanent magnet (51) and a rotor (52) for driving the impeller (10) to rotate are provided, with an diaphragm (6) being interposed. An amount of change (”F1) in attractive force (F1) between the first permanent magnet (15a, 15b) and the second permanent magnet (16a, 16b) and an amount of change (”F2) in attractive force (F2) between the third and fourth permanent magnets (50, 51) when the impeller (10) is eccentric are made substantially equal to each other. Therefore, a levitation position of the impeller (10) can always be maintained at a substantially central position in a housing (2). |
