A blood pump has an impeller rotatably disposed and magnetically suspended
within a cavity of a stator by a plurality of magnetic bearings (passive
permanent and active electromagnetic) having impeller magnets on the
impeller and stator magnets or coils/poles on the stator. A motor
includes impeller magnets on the impeller and coils/poles associated with
the stator. A single, annular blood flow path extends axially through the
cavity between the impeller and the stator, and between the impeller
magnets on the impeller and the stator magnets or the coils/poles on the
stator.