Pump, in particular a blood pump

Patent metadata

Field	Value
Publication number	US-12427301-B2
Application number	US-202318368644-A
Country	US
Kind code	B2
Filing date	Sep 15, 2023
Priority date	Oct 9, 2015
Publication date	Sep 30, 2025
Grant date	Sep 30, 2025

Abstract

The application relates to a pump, in particular blood pump. The pump comprises a drive shaft ( 3 ) which runs in an axial direction, a delivery element ( 6 ) which is connected to the drive shaft ( 3 ) in a distal region of this, and a housing ( 5 ) which surrounds the delivery element ( 6 ). The delivery element ( 6 ) and the housing ( 5 ) are designed in a manner such that these automatically unfold after a forced compression. The housing ( 5 ) moreover comprises an inlet region ( 22 ) with at least one inlet opening ( 23 ), a fluid-tight region ( 20 ) which surrounds a region of the delivery element ( 6 ), and an outlet region ( 24 ) with at least one opening ( 23 ) for the exit of the pump medium. The delivery element ( 6 ) is arranged in a manner such that it projects into the outlet region ( 24 ).

First claim

The invention claimed is:

1. A blood pump comprising:
a drive shaft which runs in an axial direction;
a delivery element which is connected to the drive shaft in a distal region of the drive shaft, wherein the delivery element comprises a rotor; and
a housing which surrounds the delivery element, wherein the delivery element and the housing are configured to automatically unfold after a forced compression, wherein the housing comprises:
a lattice;
an inlet region with at least one inlet opening;
a fluid-tight region which surrounds a region of the delivery element; and
an outlet region with at least one opening for exit of a pump medium, wherein the rotor is configured such that it extends into the outlet region,
wherein the lattice comprises lattice openings and lattice struts,
wherein a number of lattice struts along a periphery of the lattice at a first axial position of the lattice is m,
wherein the lattice is configured such that the number of lattice struts along the periphery of the lattice increases in the axial direction with n steps to m 2 n lattice struts at a second axial position of the lattice, and
wherein m and n are natural numbers, and m is larger than 2.

2. The blood pump of claim 1 , wherein the number of lattice struts along the periphery of the lattice at the second axial position of the lattice is 32 or 40.

3. The blood pump of claim 2 , wherein the housing comprises m lattice struts along a periphery in the outlet region.

4. The blood pump of claim 3 , wherein the housing comprises 4 or 5 lattice struts along the periphery in the outlet region.

5. The blood pump of claim 1 , wherein the housing comprises an elastic covering and the fluid-tight region is formed at least partly by the elastic covering.

6. The blood pump of claim 5 , wherein the lattice is configured as a rhomboid lattice with rhomboidal lattice openings in the fluid-tight region.

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

8. The blood pump of claim 1 , wherein the lattice comprises a shape memory material or a memory alloy.

9. The blood pump of claim 8 , wherein the shape memory material is nitinol.

10. The blood pump of claim 1 , wherein the lattice further comprises a covering for closing the lattice openings.

11. The blood pump of claim 10 , wherein the covering is selected from a polyurethane covering, a polyethylene covering, a polypropylene covering, a silicone covering, or a parylene covering.

12. The blood pump of claim 1 , wherein the lattice has larger lattice openings in the outlet region than in the fluid-tight region.

13. The blood pump of claim 1 , wherein the lattice has larger lattice openings in the inlet region than in the fluid-tight region.

14. The blood pump of claim 1 , wherein the lattice comprises nitinol, a plastic, an iron alloy or a copper alloy.

15. The blood pump of claim 1 , wherein the lattice is configured as a rhomboid lattice with rhomboidal lattice openings, in a region of the housing.

Assignees

• Ecp Entw Mbh

Inventors

• Siess Thorsten
• Scheckel Mario
• Schumacher Jörg

Classifications

• A61M2205/0266

  Shape memory materials · CPC title

• A61M2205/0238

  the material being a coating or protective layer · CPC title

• A61M60/808

  specially adapted for deformable impellers, e.g. expandable impellers · CPC title

• A61M60/81

  Pump housings · CPC title

• A61M60/825

  Contact bearings, e.g. ball-and-cup or pivot bearings · CPC title