US 11,813,444 B2
Blood pump
Thorsten Siess, Aachen (DE); Jimpo Wang, Danvers, MA (US); and Gerd Spanier, Aachen (DE)
Assigned to Abiomed Europe GmbH, Aschen (DE)
Filed by Abiomed Europe GmbH, Aachen (DE)
Filed on Jul. 23, 2021, as Appl. No. 17/384,111.
Application 17/384,111 is a continuation of application No. 16/087,546, granted, now 11,097,092, previously published as PCT/EP2017/056613, filed on Mar. 21, 2017.
Claims priority of application No. 16161941 (EP), filed on Mar. 23, 2016.
Prior Publication US 2022/0008713 A1, Jan. 13, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. A61M 60/419 (2021.01); A61M 60/135 (2021.01); A61M 60/422 (2021.01); A61M 60/824 (2021.01); A61M 60/82 (2021.01); A61M 60/13 (2021.01); A61M 60/139 (2021.01); A61M 60/237 (2021.01); A61M 60/232 (2021.01); A61M 60/216 (2021.01); A61M 60/825 (2021.01); A61M 60/50 (2021.01)
CPC A61M 60/419 (2021.01) [A61M 60/13 (2021.01); A61M 60/139 (2021.01); A61M 60/216 (2021.01); A61M 60/232 (2021.01); A61M 60/237 (2021.01); A61M 60/422 (2021.01); A61M 60/50 (2021.01); A61M 60/82 (2021.01); A61M 60/824 (2021.01); A61M 60/825 (2021.01)] 27 Claims
OG exemplary drawing
 
1. An intravascular blood pump for percutaneous insertion into a patient's blood vessel, comprising:
a pump casing having a blood flow inlet and a blood flow outlet,
an impeller arranged in the pump casing, the impeller rotatable about an axis of rotation, and the impeller having blades sized and shaped for conveying blood from the blood flow inlet to the blood flow outlet, and
a drive unit for rotating the impeller, the drive unit comprising a plurality of posts arranged about the axis of rotation, wherein each of the posts includes a shaft portion and a head portion, with each of the head portions pointing towards the impeller,
wherein a coil winding is disposed about the shaft portion of each of the posts, each of the coil windings being sequentially controllable to create a rotating magnetic field,
wherein the impeller comprises at least one magnet arranged to interact with the rotating magnetic field to cause rotation of the impeller,
wherein the head portion of each post has a top surface inclined at an angle relative to a plane perpendicular to the axis of rotation, and
wherein the at least one magnet of the impeller has a surface facing the head portions of the posts and being inclined at an angle corresponding to the angle of the inclined surface of at least one of the head portions.