US 11,752,322 B2
Cannula for intravascular blood pump
Walid Aboulhosn, Aachen (DE); Thorsten Siess, Aachen (DE); and Frank Kirchhoff, Aachen (DE)
Assigned to ABIOMED EUROPE GMBH, Aachen (DE)
Appl. No. 16/625,491
Filed by ABIOMED EUROPE GMBH, Aachen (DE)
PCT Filed Jun. 21, 2018, PCT No. PCT/EP2018/066590
§ 371(c)(1), (2) Date Dec. 20, 2019,
PCT Pub. No. WO2018/234454, PCT Pub. Date Dec. 27, 2018.
Claims priority of application No. 17177180 (EP), filed on Jun. 21, 2017; and application No. 17184552 (EP), filed on Aug. 2, 2017.
Prior Publication US 2021/0402170 A1, Dec. 30, 2021
Int. Cl. A61M 25/00 (2006.01); A61M 60/178 (2021.01); A61M 60/857 (2021.01); A61M 60/216 (2021.01); B29D 23/00 (2006.01); A61M 60/174 (2021.01); A61M 60/13 (2021.01)
CPC A61M 60/178 (2021.01) [A61M 25/0012 (2013.01); A61M 60/13 (2021.01); A61M 60/174 (2021.01); A61M 60/216 (2021.01); A61M 60/857 (2021.01); B29D 23/00 (2013.01)] 23 Claims
OG exemplary drawing
 
1. A method of manufacturing a cannula for an intravascular blood pump for percutaneous insertion into a patient's blood vessel, the cannula having an elongate tubular body with a blood flow inlet and a blood flow outlet, the method comprising the steps of:
forming a first axial section of the elongate tubular body by dispensing a first liquid material onto a mandrel by at least one dispenser, while the mandrel and the dispenser move relative to each other in an axial direction and a circumferential direction of the mandrel,
forming a second axial section of the elongate tubular body by dispensing a second liquid material onto the mandrel by the at least one dispenser, while the mandrel and the dispenser move relative to each other in an axial direction and a circumferential direction of the mandrel, and
blending the first liquid material and the second liquid material into each other to form a transition area such that no distinct borders can be determined between the first axial section and the second axial section, wherein the first axial section and the second axial section are formed so as to have different bending stiffnesses,
wherein the first axial section and the second axial section differ in at least one of the first liquid material and the second liquid material, and a first wall thickness of the first axial section and a second wall thickness of the second axial section, respectively, when dried, and wherein the different bending stiffnesses result from at least one of a differing first liquid material and second liquid material, and a differing wall thickness of the first axial section and the second axial section respectively, when dried.