| 摘要 |
<p>A device (50) for pumping blood, includes a housing (52) having a distal end (53) adapted to be coupled to a catheter (54), a proximal end (55) having an outlet (64), and a tubular body (56) extending between the distal and proximal ends (53, 55) along an axis (58). A rotor (66) is rotatably disposed within the housing (52). A first magnetic bearing (74, 76) is operative to levitate the rotor (66) along the axis (58) within the housing (52). A second magnetic bearing (72, 92a, 92b) controls a rotational frequency of the rotor (66). A third magnetic bearing (74, 92a, 92b) controls a radial position of the rotor (66).</p> |
