Extracorporeal axial flow blood pump with detachable stator

摘要

An axial flow blood pump comprises: an impeller (2) that rotates around an axis and is provided with axial flow blades on the peripheral surface thereof, a permanent magnet inside the impeller (2), and a dynamic bearing or a pivot bearing; a first casing (5) that surrounds the peripheral surface of the impeller (2) and is provided with an intake port (11); an annular fixed element (6) that generates a rotating magnetic field in the impeller (2) and can be fitted onto the outer surface of the first casing (5); an outlet port (12); a second casing (3) that is provided with guide vanes (diffusers) (31) in the inner surface thereof; and a socket member (4) that is fittably and securely mounted onto the outer peripheral surface of the second casing (3) and is provided with a joining portion that can join with the fixed element (6).

主权项

1. An extracorporeal axial-flow blood pump, comprising:
a first casing having a cylindrical form which permits blood flow therein; a second casing, joining the first casing, the second casing having blood flow guide vanes installed at an inner peripheral surface thereof; an axial-flow impeller disposed to be freely rotatable on the inside of the first casing in a blood flow; a detachable stator fixed detachably to an outer peripheral surface of the first casing in a position for adding rotational power to said impeller without the stator contacting the blood flow, the stator comprising a one-piece cylindrical ring which detachably surrounds a circumference of the first casing; and wherein the first casing, second casing, and impeller are disposable and the detachable stator is reusable.