Blood pump

Patent metadata

Field	Value
Publication number	US-11826501-B2
Application number	US-202117542940-A
Country	US
Kind code	B2
Filing date	Dec 6, 2021
Priority date	Oct 9, 2015
Publication date	Nov 28, 2023
Grant date	Nov 28, 2023

Abstract

The invention relates to a blood pump. The blood pump comprises a flexible drive shaft guided in a catheter, a conveying element connected to the drive shaft in a distal region of the drive shaft, and a motor, wherein the motor has a stator and a rotor mounted such that it can move in the stator. The stator comprises a winding and the rotor comprises a rotor magnet. In addition, the drive shaft is connected to the rotor at a proximal end of the drive shaft. The stator and the rotor are nondetachably connected to one another, and form a gap with a ring-shaped cross-section, which is delimited by the rotor and the stator.

First claim

The invention claimed is:

1. A blood pump comprising:
a pump housing having a blood flow inlet region, a blood flow outlet region, and a fluid-tight region comprising an elastic covering, wherein the fluid-tight region is arranged between the blood flow inlet region and the blood flow outlet region, and the elastic covering does not cover the blood flow inlet region and the blood flow outlet region;
a flexible drive shaft positioned in a lumen of a catheter, wherein the lumen of the catheter is in fluid communication with the pump housing;
a delivery element connected to the flexible drive shaft in a distal region of the flexible drive shaft; and
a motor having a motor housing configured to be arranged outside a body of a patient, wherein the motor comprises:
a stator and
a rotor rotatably mounted in the stator,

wherein the flexible drive shaft is connected to the rotor at a proximal end of the flexible drive shaft, and wherein the stator and the rotor are connected to one another and form a gap delimited by the rotor and the stator,
wherein the motor housing comprises a rinsing opening fluidically connected to the gap, wherein, during operation of the blood pump, blood enters the pump housing through the blood flow inlet region, the motor drives the flexible drive shaft, the flexible drive shaft rotates the delivery element, and the blood exits the pump housing through the blood flow outlet region, and
wherein the rinsing opening, the gap, and the lumen of the catheter are in fluid communication such that, during operation of the blood pump, a rinsing fluid introduced into the rinsing opening passes through the gap and the lumen of the catheter and exits the lumen of the catheter into the pump housing.

2. The blood pump of claim 1 , wherein the elastic covering comprises polyurethane.

3. The blood pump of claim 1 , wherein the elastic covering does not completely cover the delivery element.

4. The blood pump of claim 3 , wherein the elastic coveting does not cover about one-third of an axial extension of the delivery element.

5. The blood pump of claim 1 , wherein the pump housing further comprises a rhomboidal lattice with rhomboidal lattice openings.

6. The blood pump of claim 5 , wherein the elastic covering covers an inner side and an outer side of the rhomboidal lattice in the fluid-tight region.

7. The blood pump of claim 6 , wherein the elastic covering covers the rhomboidal lattice openings in the fluid-tight region.

8. The blood pump of claim 5 , wherein the rhomboidal lattice openings in the blood flow inlet region form inlet openings and the rhomboidal lattice openings in the blood flow outlet region form outlet openings.

9. The blood pump of claim 8 , wherein during operation of the blood pump, blood enters the pump housing through the inlet openings of the blood flow inlet region and the blood exits the pump housing through the outlet openings of the blood flow outlet region.

10. The blood pump of claim 5 , wherein the rhomboidal lattice comprises lattice struts.

11. The blood pump of claim 10 , wherein the lattice struts are arranged such that the rhomboidal lattice openings in the blood flow inlet region and in the blood flow outlet region are larger than the rhomboidal lattice openings in the fluid-tight region.

12. The blood pump of claim 10 , wherein there are fewer lattice struts in each of the blood flow inlet region and the blood flow outlet region compared to the fluid-tight region.

13. The blood pump of claim 10 , wherein the lattice struts in each of the blood flow inlet region and the blood flow outlet region form a spiral-shaped structure.

14. The blood pump of claim 1 , wherein each of t blood flow inlet region and the blood flow outlet region is conical in shape.

15. The blood pump of claim 1 , wherein the fluid-tight region is tubular in shape.

16. The blood pump of claim 1 , wherein the stator comprises a winding and the rotor comprises a rotor magnet.

17. The blood pump of claim 1 , further comprising an unfoldable pump head which encompasses the delivery element and the pump housing, wherein the delivery element and the pump housing are designed to automatically unfold after a forced compression.

18. The blood pump of claim 1 , wherein the flexible drive shaft has a length sufficient to connect the delivery element arranged inside a ventricle with the motor arranged outside the body of the patient.

Assignees

• Ecp Entw Mbh

Inventors

• Siess Thorsten
• Spanier Gerd
• Schumacher Joerg

Classifications

• A61M60/857

  Implantable blood tubes · CPC title

• A61M60/13

  by means of a catheter allowing explantation, e.g. catheter pumps temporarily introduced via the vascular system · CPC title

• A61M60/414 Primary

  transmitted by a rotating cable, e.g. for blood pumps mounted on a catheter · CPC title

• A61M60/81

  Pump housings · CPC title

• A61M60/812

  Vanes or blades, e.g. static flow guides · CPC title