Clot retrieval device for removing clot from a blood vessel

Patent metadata

Field	Value
Publication number	US-11937835-B2
Application number	US-201916510652-A
Country	US
Kind code	B2
Filing date	Jul 12, 2019
Priority date	Mar 14, 2013
Publication date	Mar 26, 2024
Grant date	Mar 26, 2024

Abstract

A clot retrieval device for removing clot from a blood vessel, including a shaft; a plurality of expandable bodies distal of the shaft, each expandable body comprising a plurality of scaffolding segments forming closed cells, wherein at least one of the clot scaffolding segments terminates in a distal apex free from connection to an adjacent closed cell; and a plurality of clot inlet mouths between expandable bodies through which clot may pass and enter the device.

First claim

What is claimed is:

1. A clot retrieval device for removing a clot from a blood vessel, comprising:
a shaft;
a first expandable body distal of the shaft and a second expandable body distal of the first expandable body, each of the first and second expandable body comprising a plurality of scaffolding segments forming closed cells, wherein at least one of the scaffolding segments of the first expandable body terminates in a distal apex free from connection to an adjacent closed cell; and
a plurality of clot inlet mouths between the first and second expandable bodies through which the clot may pass and enter the device,
wherein the first expandable body is connected to the second expandable body by only two connecting arms, the connecting arms located on opposing sides of a longitudinal axis of the clot retrieval device.

2. The device of claim 1 , wherein at least one of the clot inlet mouths is between the distal apex and the second expandable body.

3. The device of claim 1 , wherein the plurality of clot inlet mouths comprises two or more clot inlet mouths, and
wherein the second expandable body comprises at least one distal apex free from connection to an adjacent closed cell.

4. The device of claim 1 , further comprising:
one or more radiopaque features disposed on at least a one of the plurality of scaffolding segments of the first and second expandable bodies.

5. The device of claim 1 , wherein a proximal end of the first expandable body proximally tapers to a junction with a distal end of the shaft.

6. The device of claim 1 , wherein the second expandable body distally tapers to a closed end comprising a radiopaque element.

7. A monolithic clot retrieval device for removing a clot from a blood vessel, comprising:
a plurality of expandable portions having a plurality of struts with closed cells and one or more distal-most apices of the plurality of struts free from connection of an adjacent strut such that the distal-most apices are positioned at a circumference equal to an overall circumference of the plurality of expandable portions in an expanded configuration; and
a plurality of clot inlet mouths between respective expandable portions of the plurality of expandable portions through which the clot may pass and enter the device,
wherein a first expandable portion of the plurality of expandable portions is connected to a second expandable portion of the plurality of expandable portions by only two connecting arms, the connecting arms located on opposing sides of a longitudinal axis of the clot retrieval device.

8. The device of claim 7 , further comprising:
one or more radiopaque features disposed on struts of the plurality of expandable portions.

9. The device of claim 7 , further comprising:
a shaft extended proximally of a proximal end of one of the plurality of expandable portions.

10. The device of claim 9 , wherein a proximal end of the first expandable portion of the plurality of expandable portions proximally tapers to a junction with a distal end of the shaft.

11. The device of claim 9 , wherein a distal end of a distal most expandable portion of the plurality of expandable portions distally tapers to a closed end comprising a radiopaque element.

12. The device of claim 9 , wherein the device is a monolithic structure.

13. The device of claim 9 , wherein the closed cells of the plurality of expandable portions are smaller than the plurality of clot inlet mouths of the respective expandable portions of the plurality of expandable portions.

14. A clot retrieval device for removing a clot from a blood vessel, comprising:
a plurality of expandable portions comprising a plurality of struts forming closed cells and forming distal apices positioned at a circumference equal to an overall circumference of the plurality of expandable portions in an expanded configuration, and
at least two inlet mouths disposed between a first expandable portion of the plurality of expandable portions and a second expandable portion of the plurality of expandable portions, the at least two inlet mouths being larger than the closed cells of the plurality of expandable portions and being configured so the clot may pass therethrough,
wherein the first expandable portion is connected to the second expandable portion by only two connecting arms, the connecting arms located on opposing sides of a longitudinal axis of the clot retrieval device.

15. The device of claim 14 , further comprising:
one or more radiopaque features disposed on struts of at least one of the plurality of expandable portions.

16. The device of claim 14 , further comprising:
a shaft extended proximally of a proximal end of the first expandable portion of the plurality of expandable portions.

17. The device of claim 16 , wherein the proximal end of the first expandable portion of the plurality of expandable portions proximally tapers to a junction with a distal end of the shaft.

18. The device of claim 14 , wherein at least one of the plurality of expandable portions distally tapers to a closed end comprising a radiopaque element.

19. The device of claim 14 , wherein the device is a monolithic structure.

20. The device of claim 14 , wherein the closed cells of at least one of the plurality of expandable portions are smaller than the at least one of the two inlet mouths of the at least one plurality of expandable portions.

Assignees

• Neuravi Ltd

Inventors

• Vale David
• Brady Eamon
• Gilvarry Michael
• Razavi Mahmood
• Mcardle Kevin
• Hardiman David
• Casey Brendan

Classifications

• A61B17/221 Primary

  Gripping devices in the form of loops or baskets {for gripping calculi or similar types of obstructions (surgical snare instruments A61B17/32056)} · CPC title

• A61B17/12109

  in a blood vessel · CPC title

• A61B17/320725

  with radially expandable cutting or abrading elements (A61B17/32075 takes precedence) · CPC title

• A61F2/013

  Distal protection devices, i.e. devices placed distally in combination with another endovascular procedure, e.g. angioplasty or stenting · CPC title

• A61M29/00

  Dilators with or without means for introducing media, e.g. remedies · CPC title