A magnetic bearing contactlessly supporting a rotor by magnetic force includes: a bearing rotor member made of a magnetic material; and a bearing stator member arranged around bearing rotor member. The bearing stator member includes a core made of a magnetic material and a coil wound around the core. A longitudinal cross-sectional shape of the core has a first part extending in a first direction orthogonal to a direction opposed to the bearing rotor member and wound around with the coil, a pair of second parts extending from both end portions in the first direction of first part to the bearing rotor member side and subsequently extending in a direction approaching each other in the first direction, and a pair of third parts extending from respective distal end portions of the pair of second parts toward the bearing rotor member side. The bearing rotor member also includes a permanent magnet.

A magnetic bearing contactlessly supporting a rotor by magnetic force includes: a bearing rotor member made of a magnetic material; and a bearing stator member arranged around bearing rotor member. The bearing stator member includes a core made of a magnetic material and a coil wound around the core. A longitudinal cross-sectional shape of the core has a first part extending in a first direction orthogonal to a direction opposed to the bearing rotor member and wound around with the coil, a pair of second parts extending from both end portions in the first direction of first part to the bearing rotor member side and subsequently extending in a direction approaching each other in the first direction, and a pair of third parts extending from respective distal end portions of the pair of second parts toward the bearing rotor member side. The bearing rotor member also includes a permanent magnet.

Methods of operating a blood pump having a magnetically levitated impeller. A method of operating a blood pump includes controlling supply of drive currents to drive coils of the blood pump to magnetically rotate an impeller around an impeller axis of rotation within a blood flow channel of a blood pump. Supply of a bearing current to a levitation coil of the blood pump is controlled to magnetically levitate the impeller in a direction transverse to the impeller axis of rotation so as to minimize power consumption of the blood pump during operation of the blood pump.

Methods of operating a blood pump having a magnetically levitated impeller. A method of operating a blood pump includes controlling supply of drive currents to drive coils of the blood pump to magnetically rotate an impeller around an impeller axis of rotation within a blood flow channel of a blood pump. Supply of a bearing current to a levitation coil of the blood pump is controlled to magnetically levitate the impeller in a direction transverse to the impeller axis of rotation so as to minimize power consumption of the blood pump during operation of the blood pump.

Disclosed herein is an outflow graft assembly for an implantable blood pump. The outflow graft assembly includes a graft, a locking nut including a plurality of planar edges and a plurality of corners, and a U-shaped fixation clip. The U-shaped fixation clip includes a first flat segment including a first flexure including a first locking feature, a second flat segment including a second flexure including a second locking feature, an arcuate segment extending between the first flat segment and the second flat segment, and a lip including a first flat and a second flat. The U-shaped fixation clip is configured to engage the locking nut such that the first and second locking features contact associated corners of the plurality of corners and the first and second flats contact associated planar edges of the plurality of planar edges, thereby preventing rotation of the locking nut relative to the fixation clip.

A heart pump including: a housing forming a cavity including: at least one inlet aligned with an axis of the cavity; and, at least one outlet provided in a circumferential outer wall of the cavity; an impeller provided within the cavity, the impeller including vanes for urging fluid from the inlet to the outlet; and, a drive for rotating the impeller in the cavity and wherein a flow path through the pump has a minimal cross-sectional area of at least 50 mm.sup.2.

A heart pump device may be provided with an implantable heart pump, which has at least one sensor, wherein at least one of the sensors is a sensor for a rotor of the heart pump, and with a control device, which is connected to the heart pump by means of a transcutaneous line, characterised by a signal processing device, which on the one hand is connected by means of the transcutaneous line to the control device, and which on the other hand is connected to at least one sensor of the heart pump and transmits signals of at least one sensor via the transcutaneous line to the control unit. The signal processing device may be for a pre-processing of the sensor data for more efficient transmission via the transcutaneous line.

A centrifugal fluid pump with a fully magnetically suspended rotor to improve blood compatibility when pumping blood is disclosed. The pump stabilizes radial displacements of a disc-like rotor with active control through separate electric motor and magnetic bearings to improve the pump's critical performances including device packaging size, system simplicity and reliability, stiffness and other dynamic performances of suspension, power efficiency, and others.

A heart pump including: a housing forming a cavity including: at least one inlet aligned with an axis of the cavity; and, at least one outlet provided in a circumferential outer wall of the cavity; an impeller provided within the cavity, the impeller including vanes for urging fluid from the inlet to the outlet; and, a drive for rotating the impeller in the cavity and wherein a flow path through the pump has a minimal cross-sectional area of at least 50 mm.sup.2.

A heart pump including: a housing forming a cavity including: at least one inlet aligned with an axis of the cavity; and, at least one outlet provided in a circumferential outer wall of the cavity; an impeller provided within the cavity, the impeller including vanes for urging fluid from the inlet to the outlet; and, a drive for rotating the impeller in the cavity and wherein a flow path through the pump has a minimal cross-sectional area of at least 50 mm.sup.2.