US 12,064,615 B2
Axial-flow pump for a ventricular assist device and method for producing an axial-flow pump for a ventricular assist device
Ingo Stotz, Ditzingen (DE); and Niko Baeuerle, Bad Liebenzell (DE)
Assigned to Kardion GmbH, Stuttgart (DE)
Appl. No. 17/057,252
Filed by KARDION GMBH, Stuttgart (DE)
PCT Filed May 30, 2019, PCT No. PCT/EP2019/064157
§ 371(c)(1), (2) Date Jun. 18, 2021,
PCT Pub. No. WO2019/229223, PCT Pub. Date Dec. 5, 2019.
Claims priority of application No. 102018208541.2 (DE), filed on May 30, 2018.
Prior Publication US 2021/0330958 A1, Oct. 28, 2021
Int. Cl. A61M 60/237 (2021.01); A61M 60/13 (2021.01); A61M 60/178 (2021.01); A61M 60/806 (2021.01); F04D 3/02 (2006.01)
CPC A61M 60/237 (2021.01) [A61M 60/13 (2021.01); A61M 60/178 (2021.01); A61M 60/806 (2021.01); F04D 3/02 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A cardiac support system for insertion through a catheter into a blood vessel, comprising:
an axial flow pump comprising:
a tube-shaped pump housing having an axis of rotation extending therethrough; and
a pump rotor extending in the pump housing and being rotatable about the axis of rotation, the pump rotor comprising a hub and at least one blade element, the at least one blade element being wound at least in sections helically around the hub and configured to axially draw blood into the pump housing in a direction toward the hub;
wherein the pump housing further comprises:
a pump intake section upstream of the pump rotor and configured to receive the blood drawn into the pump housing, the pump intake section being penetrated by the axis of rotation; and
at least one peripheral outlet opening configured to laterally discharge the blood drawn into the pump housing;
wherein at least a portion of the at least one blade element is disposed downstream of an upstream edge of the at least one peripheral outlet opening; and
wherein the at least one blade element has a profile with camber lines, wherein a curvature of each of the camber lines when unwound into a plane increases along the axis of rotation in a direction starting from the pump intake section towards the at least one peripheral outlet opening to an inflection point at which a blade angle (ß) of the blade element is at a maximum, and wherein the curvature of each of the camber lines decreases after the inflection point; and
wherein, in a region of the pump rotor located radially relative to the axis of rotation and having a blade height SH of the at least one blade element defined relative to a maximum blade height SHMAX so that 25%≤SH/SHMAX≤100%, the inflection point of each of the camber lines is located in a region of an upstream edge of the at least one peripheral outlet opening.