Clot retrieval device for removing clot from a blood vessel

Patent metadata

Field	Value
Publication number	US-11839392-B2
Application number	US-201916659624-A
Country	US
Kind code	B2
Filing date	Oct 22, 2019
Priority date	Mar 14, 2013
Publication date	Dec 12, 2023
Grant date	Dec 12, 2023

Abstract

A clot retrieval device for removing clot from a blood vessel, including a shaft extending between a proximal end and a distal end; a first expandable body coupled to the distal end of the shaft, the first 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; a second expandable body distal of the first expandable body and comprising a plurality of scaffolding segments forming closed cells; and at least one clot inlet mouth between the first and second expandable bodies and the distal apex 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 extending between a proximal end and a distal end;
a first expandable body coupled to the distal end of the shaft, the first 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;
a second expandable body distal of the first expandable body and comprising a plurality of scaffolding segments forming closed cells; and
at least one clot inlet mouth between the first and second expandable bodies and the distal apex through which the clot may pass and enter the device,
wherein at least three closed cells of the second expandable body each have a different shape relative to one another, wherein at least one of the closed cells of the first expandable body is smaller than at least one of the closed cells of the second expandable body, and wherein the clot retrieval device is monolithic.

2. The device of claim 1 , further comprising:
one or more radiopaque features disposed on struts of the first and/or second expandable bodies.

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

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

5. A clot retrieval device for removing a clot from a blood vessel, comprising:
a shaft;
a first expandable portion 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;
a second expandable portion located distal of the first expandable portion, the second expandable portion having a plurality of struts forming closed cells and a distally tapering portion at a distal end of the second expandable portion; and
at least one clot inlet mouth defined between the distal most apices and the second expandable portion through which the clot may pass and enter the device,
wherein at least three closed cells of the second expandable body each have a different shape relative to one another,
wherein the shaft extended proximally of a proximal end of the first expandable portion,
wherein at least one of the closed cells of the first expandable body is smaller than at least one of the closed cells of the second expandable body, and
wherein the clot retrieval device is monolithic.

6. The device of claim 5 , further comprising:
one or more radiopaque features disposed on struts of the first and/or second expandable portions.

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

8. The device of claim 5 , wherein the second expandable portion distally tapers to a closed end comprising a radiopaque element.

9. A clot retrieval device for removing a clot from a blood vessel, comprising:
a shaft;
a first expandable portion comprising a plurality of struts forming closed cells and at least one strut terminating in crowns with no distal connecting elements; and
a second expandable portion distal of the first expandable portion, the second expandable portion comprising a plurality of struts forming closed cells and at least one strut terminating in crowns with no distal connecting elements;
wherein an inlet mouth is disposed between the first and second expandable portions, the inlet mouth being larger than the cells of the first and second expandable portions and being configured so the clot may pass therethrough,
wherein at least three closed cells of the second expandable body each have a different shape relative to one another,
wherein the shaft extended proximally of a proximal end of the first expandable portion,
wherein at least one of the closed cells of the first expandable body is smaller than at least one of the closed cells of the second expandable body, and
wherein the clot retrieval device is monolithic.

10. The device of claim 9 , further comprising:
one or more radiopaque features disposed on struts of the first and/or second expandable portions.

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

12. The device of claim 9 , wherein the second expandable portion distally tapers to a closed end comprising a radiopaque element.

Assignees

• Neuravi Ltd

Inventors

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

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