This invention relates to an intravascular blood pump, comprising a pumping device with a pump section and a drive section, wherein the pump section comprises a pump casing having a primary blood flow inlet and a primary blood flow outlet hydraulically connected by a primary passage and the drive section comprises a stator and a rotor rotatable about an axis of rotation and configured to rotate a primary impeller, the primary impeller being configured to convey a primary blood flow from the primary blood flow inlet to the primary blood flow outlet along the primary passage, the drive section further comprises an ancillary blood flow inlet and an ancillary blood flow outlet hydraulically connected by an ancillary passage extending through an axial gap between the rotor and the stator and an ancillary impeller arranged at a drive section end (DSE) of the rotor and rotatable about the axis of rotation along with the rotor, the ancillary impeller comprising one or more ancillary impeller vanes configured to convey an ancillary blood flow (ABF) from the ancillary blood flow inlet to the ancillary blood flow outlet along the ancillary passage in a direction toward a pump section end (PSE) of the pumping device, and the rotor is mounted in a blood-purged radial sliding rotor bearing with an inner rotor bearing surface and an outer rotor bearing surface, and the ancillary impeller forms the inner rotor bearing surface of the radial sliding rotor bearing.

The application relates to a catheter device with a distal bearing for bearing a distal end of a drive shaft. The distal bearing comprises a heat conducting part for enabling heat transfer away from the distal bearing and/or a spiral sleeve for receiving the distant end of the drive shaft.

The application relates to a catheter device with a distal bearing for bearing a distal end of a drive shaft. The distal bearing comprises a heat conducting part for enabling heat transfer away from the distal bearing and/or a spiral sleeve for receiving the distant end of the drive shaft.

A percutaneous circulatory support device includes an impeller housing having an inlet and an outlet. A shaft is rotatably fixed relative to the impeller housing. An impeller is configured to rotate relative to the shaft and the impeller housing to cause blood to flow into the inlet, through the impeller housing, and out of the outlet.

Various aspects of the present disclosure are directed towards apparatuses, systems, and methods that include a percutaneous circulatory support device. The percutaneous circulatory support device is used with a guidewire and may include a housing having a blood outlet aperture. The blood outlet aperture may include a channel that is configured to receive and support the guidewire.

A percutaneous circulatory support device includes a housing having an inlet and an outlet. A shaft is rotatably fixed relative to the housing. An impeller is disposed within the housing and is rotatably supported by the shaft. The impeller is configured to rotate relative to the shaft and the housing to cause blood to flow into the inlet, through the housing, and out of the outlet. A keeper is coupled to the shaft distally relative to the impeller, and the keeper inhibits axial motion of the impeller relative to the shaft.

An intravascular blood pump (1) comprises a pump casing (2) having a blood flow inlet (21) and a blood flow outlet (22), and an impeller (3) arranged in said pump casing (2) so as to be rotatable about an axis of rotation, wherein the impeller (3) has blades (31) sized and shaped for conveying blood from the blood flow inlet (21) to the blood flow outlet (22). The blood pump (1) further comprises a drive unit (104) for rotating the impeller (3), the drive unit (104) comprising a plurality of posts (140) arranged about the axis of rotation (10). Coil windings (47) around the posts are sequentially controllable so as to create a rotating magnetic field. The shaft portion (141) of each of the posts (140) comprises a soft magnetic material which is discontinuous in cross-section transverse to the longitudinal axis of the respective post (140).

An interventional ventricular assist device (100), including: an interventional tube (10). a motor assembly (30), a perfusion cylinder (40), and an impeller assembly (20). The interventional tube (10) has a liquid inlet (11) and a liquid outlet (12). The impeller assembly (20) includes an impeller (21), accommodated within the interventional tube (10) and rotatable to enable a liquid to flow into the interventional tube (10) via the liquid inlet (11) and out therefrom via the liquid outlet (12). The motor assembly (30) is configured to generate a rotating magnetic field to drive the impeller (21) to rotate and generate an attraction to the impeller (21). A perfusate injected from the perfusion cylinder (40) is adapted to provide a thrust to the impeller assembly (20), whereby the impeller (21) is suspendedly rotatable in the interventional tube (10) under a combined action of the thrust and the attraction.

To design the rotor (6, 6′, 6″, 6″′, 60, 60′) as compressible in the radial direction in a fluid pump, in particular for microinvasive medical use, said rotor is configured as stretchable in its longitudinal direction (16) by push elements and pull elements acting axially on it.

To design the rotor (6, 6′, 6″, 6″′, 60, 60′) as compressible in the radial direction in a fluid pump, in particular for microinvasive medical use, said rotor is configured as stretchable in its longitudinal direction (16) by push elements and pull elements acting axially on it.