Impeller for catheter pump

Patent metadata

Field	Value
Publication number	US-11357967-B2
Application number	US-202017083467-A
Country	US
Kind code	B2
Filing date	Oct 29, 2020
Priority date	May 14, 2012
Publication date	Jun 14, 2022
Grant date	Jun 14, 2022

Abstract

An impeller for a pump is disclosed herein. The impeller can include a hub having a fixed end and a free end. The impeller can also have a plurality of blades supported by the hub. Each blade can have a fixed end coupled to the hub and a free end. The impeller can have a stored configuration and a deployed configuration, the blades in the deployed configuration extending away from the hub, and the blades in the stored configuration being compressed against the hub.

First claim

What is claimed is:

1. An impeller for a catheter pump, the impeller comprising:
a hub having a proximal end portion and a distal end portion; and
a plurality of blades supported by the hub, the plurality of blades transitionable between a stored position and a deployed position, wherein each blade of the plurality of blades wraps around the hub by a wrapping angle between about 150 degrees and about 220 degrees.

2. The impeller of claim 1 , wherein each blade of the plurality of blades wraps around the hub by a wrapping angle between about 180 degrees and about 200 degrees.

3. The impeller of claim 1 , wherein at least one blade of the plurality of blades has a wrapping angle of 210 degrees.

4. The impeller of claim 1 , wherein the wrapping angle of each blade is selected to facilitate folding the blade into the stored position.

5. The impeller of claim 1 , wherein each blade includes a first fillet formed at a fixed end of the blade on a suction side, and a second fillet formed at the fixed end of the blade on a pressure side.

6. The impeller of claim 5 , wherein the first fillet supports the blade during rotation, and wherein the second fillet assists in folding the blade into the stored configuration.

7. The impeller of claim 5 , wherein the first fillet has a larger radius that the second fillet.

8. A catheter pump comprising:
a catheter; and
an impeller mounted at an end of the catheter, the impeller comprising:
a hub having a proximal end portion and a distal end portion; and
a plurality of blades supported by the hub, the plurality of blades transitionable between a stored position and a deployed position, wherein each blade of the plurality of blades wraps around the hub by a wrapping angle between about 150 degrees and about 220 degrees.

9. The catheter pump of claim 8 , wherein each blade of the plurality of blades wraps around the hub by a wrapping angle between about 180 degrees and about 200 degrees.

10. The catheter pump of claim 8 , wherein at least one blade of the plurality of blades has a wrapping angle of 210 degrees.

11. The catheter pump of claim 8 , wherein the wrapping angle of each blade is selected to facilitate folding the blade into the stored position.

12. The catheter pump of claim 8 , wherein each blade includes a first fillet formed at a fixed end of the blade on a suction side, and a second fillet formed at the fixed end of the blade on a pressure side.

13. The catheter pump of claim 12 , wherein the first fillet supports the blade during rotation, and wherein the second fillet assists in folding the blade into the stored configuration.

14. The catheter pump of claim 12 , wherein the first fillet has a larger radius that the second fillet.

15. A catheter pump comprising:
an expandable cannula; and
an impeller positioned within the expandable cannula, the impeller comprising:
a hub having a proximal end portion and a distal end portion; and
a plurality of blades supported by the hub, the plurality of blades transitionable between a stored position and a deployed position, wherein each blade of the plurality of blades wraps around the hub by a wrapping angle between about 150 degrees and about 220 degrees.

16. The catheter pump of claim 15 , wherein each blade of the plurality of blades wraps around the hub by a wrapping angle between about 180 degrees and about 200 degrees.

17. The catheter pump of claim 15 , wherein at least one blade of the plurality of blades has a wrapping angle of 210 degrees.

18. The catheter pump of claim 15 , wherein the wrapping angle of each blade is selected to facilitate folding the blade into the stored position.

19. The catheter pump of claim 15 , wherein each blade includes a first fillet formed at a fixed end of the blade on a suction side, and a second fillet formed at the fixed end of the blade on a pressure side.

20. The catheter pump of claim 19 , wherein the first fillet supports the blade during rotation, and wherein the second fillet assists in folding the blade into the stored configuration.

Assignees

• Tc1 Llc

Inventors

• Zeng Zijing
• Yuen Phyllis
• Butler Michael R

Classifications

• F04D29/183 Primary

  Semi axial flow rotors · CPC title

• A61M60/808

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

• A61M60/546

  of blood flow, e.g. by adapting rotor speed · CPC title

• A61M60/13 Primary

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

• A61M60/174

  discharging the blood to the ventricle or arterial system via a cannula internal to the ventricle or arterial system · CPC title