Intravascular blood pumps and methods of use and manufacture

Patent metadata

Field	Value
Publication number	US-12370358-B2
Application number	US-202418615896-A
Country	US
Kind code	B2
Filing date	Mar 25, 2024
Priority date	Feb 1, 2018
Publication date	Jul 29, 2025
Grant date	Jul 29, 2025

Abstract

Devices for moving blood within a patient, and methods of doing so. The devices can include a pump portion that includes an impeller and a housing around the impeller, as well as a fluid lumen. The impeller can be activated to cause rotation of the impeller and thereby move fluid within the fluid lumen.

First claim

What is claimed is:

1. An intravascular blood pump, comprising:
an elongate shaft;
a collapsible housing extending distally from the elongate shaft and including an expandable blood conduit that defines a blood lumen between a proximal end and a distal end, the collapsible housing further including a proximal portion, a central portion, and a distal portion, the proximal portion extending proximally beyond the proximal end of the fluid conduit, the distal portion extending distally beyond the distal end of the fluid conduit, the central portion being more flexible than the proximal portion and the distal portion; and
a collapsible impeller having an expanded configuration, a portion of the collapsible impeller being disposed outside of the fluid conduit while a remaining portion of the collapsible impeller is disposed in the fluid conduit.

2. The blood pump of claim 1 , wherein the collapsible impeller is disposed in the proximal portion of the expandable housing, wherein the portion of the collapsible impeller disposed outside of the fluid conduit is proximal to the fluid conduit.

3. The blood pump of claim 1 , wherein from 20% to 50% of the impeller, measured along an axial length of the impeller, is disposed outside of the fluid conduit.

4. The blood pump of claim 1 , wherein from 20% to 45% of the impeller, measured along an axial length of the impeller, is disposed outside of the fluid conduit.

5. The blood pump of claim 1 , wherein from 20% to 40% of the impeller, measured along an axial length of the impeller, is disposed outside of the fluid conduit.

6. The blood pump of claim 1 , wherein about 20% of the impeller, measured along an axial length of the impeller, is disposed outside of the fluid conduit.

7. The blood pump of claim 1 , wherein about 25% of the impeller, measured along an axial length of the impeller, is disposed outside of the fluid conduit.

8. The blood pump of claim 1 , wherein about 30% of the impeller, measured along an axial length of the impeller, is disposed outside of the fluid conduit.

9. The blood pump of claim 1 , wherein about 35% of the impeller, measured along an axial length of the impeller, is disposed outside of the fluid conduit.

10. The blood pump of claim 1 , wherein about 40% of the impeller, measured along an axial length of the impeller, is disposed outside of the fluid conduit.

11. The blood pump of claim 1 , wherein the impeller has a tapered proximal end region.

12. The blood pump of claim 11 , wherein the tapered proximal end region is disposed at least partially within a flared proximal end of the fluid conduit.

13. The blood pump of claim 1 , wherein the fluid conduit has a flared proximal end region.

14. The blood pump of claim 1 , wherein the fluid conduit has a flared distal end region.

15. The blood pump of claim 1 , wherein the impeller is disposed entirely within the expandable member.

16. The blood pump of claim 15 , wherein the proximal portion of the expandable member tapers inward proximal to a proximal end of the impeller.

17. The blood pump of claim 1 , wherein the expandable member has a distal portion extending distally beyond the distal end of the fluid conduit.

18. The blood pump of claim 1 , wherein at least a portion of the collapsible housing has a helical configuration.

19. The blood pump of claim 18 , wherein the proximal portion and the distal portion of the collapsible housing have a mostly axial configuration.

20. The blood pump of claim 1 , wherein the proximal portion and the distal portion of the collapsible housing have a mostly axial configuration.

Assignees

• Shifamed Holdings Llc

Inventors

• Salahieh Amr
• Saul Tom
• Esch Brady
• Kerlo Anna
• Hildebrand Daniel
• Varghai Daniel

Classifications

• A61M60/139

  inside the aorta, e.g. intra-aortic balloon pumps · CPC title

• A61M60/237

  the blood flow through the rotating member having mainly axial components, e.g. axial flow pumps · CPC title

• A61M60/818

  Bearings · CPC title

• A61M60/804

  Impellers · 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