Clot retrieval device for removing clot from a blood vessel

• US 9,642,639 B2
• Filed: 12/31/2015
• Issued: 05/09/2017
• Est. Priority Date: 03/09/2011
• Status: Active Grant

• Current Assignee: Neuravi Limited (Johnson & Johnson)
• Original Assignee: Neuravi Limited (Johnson & Johnson)
• Inventors: Brady, Eamon, Gilvarry, Michael, Razavi, Mahmood K., Vale, David, Griffin, Patrick, Casey, Brendan, McNamara, Jason
• Primary Examiner(s): NGUYEN, TUAN VAN
• Application Number:
  US14/986,412
• Publication Number:
  US 20160192956A1
• Time in Patent Office: 495 Days
• Field of Search: 606113, 606114, 606127, 606200
• CPC Class Codes: A61B 17/22031 Gripping instruments, e.g. forceps, for removing or smashing calculi A61B17/221 takes precedence
• CPC Class Codes: A61B 17/221 Gripping devices in the form of loops or baskets for gripping calculi or similar types of obstructions surgical snare instruments A61B17/32056
• CPC Class Codes: A61B 17/320725 with radially expandable cutting or abrading elements A61B17/32075 takes precedence
• CPC Class Codes: A61B 2017/00292 mounted on or guided by flexible, e.g. catheter-like, means
• CPC Class Codes: A61B 2017/00526 Methods of manufacturing
• CPC Class Codes: A61B 2017/00867 shape memory effect for prostheses A61F2210/0014
• CPC Class Codes: A61B 2017/22034 for gripping the obstruction or the tissue part from inside
• CPC Class Codes: A61B 2017/22094 for crossing total occlusions, i.e. piercing
• CPC Class Codes: A61B 2017/2212 having a closed distal end, e.g. a loop
• CPC Class Codes: A61B 2017/2215 having an open distal end
• CPC Class Codes: A61F 2/011 Instruments for their placement or removal
• CPC Class Codes: A61F 2/013 Distal protection devices, i.e. devices placed distally in combination with another endovascular procedure, e.g. angioplasty or stenting
• CPC Class Codes: A61F 2002/016 made from wire-like elements
• CPC Class Codes: A61F 2002/018 made from tubes or sheets of material, e.g. by etching or laser-cutting
• CPC Class Codes: A61F 2230/0069 cylindrical
• CPC Class Codes: A61F 2230/008 paraboloidal
• CPC Class Codes: A61F 2230/0091 helically-coiled or spirally-coiled, i.e. having a 2-D spiral cross-section
• CPC Class Codes: A61F 2230/0093 Umbrella-shaped, e.g. mushroom-shaped

Abstract

A clot retrieval device (9501) for removing clot from a blood vessel comprises an inner elongate body (9503) and an outer elongate body (9504) at least partially overlying the inner elongate body (9503). The device also comprises an elongate member or shaft (9502) having a proximal end which extends exterior of a patient so that a user can retrieve the stent-basket device and captured clot by retracting the shaft (9502). The outer elongate body (9504) and the inner elongate body (9503) are connected to the distal end of the shaft (9502) and are expandable relative to the shaft (9502) from a collapsed delivery configuration to an expanded deployed configuration. The outer elongate body (9504) is expandable relative to the inner elongate body (9503) to a radial extent which is greater than the radial extent of the inner body (9503) in the deployed configuration.

Claims

1. A clot retrieval device for removing clot from a blood vessel, the device having a collapsed delivery configuration and an expanded deployed configuration and comprising:

a shaft extending between a proximal end and a distal end;

a self-expandable outer body eccentrically coupled to the shaft, the expandable outer body comprising a plurality of longitudinally spaced clot scaffolding segments separated by voids forming a plurality of clot inlet mouths between the adjacent clot scaffolding segments, wherein each clot scaffolding segment includes a plurality of closed cells, wherein at least one closed cell of each of the plurality of the clot scaffolding segments terminates in a distal apex free from connection to an adjacent closed cell; and

an inner expandable body including a plurality of struts,

the outer expandable body at least partially overlying the inner expandable body and being expandable to a radial extent which is greater than the radial extent of the inner expandable body in the deployed configuration to provide a clot reception space radially between the inner expandable body and the outer expandable body.

2. The device of claim 1, wherein each clot inlet mouth is formed by two connections between adjacent clot scaffolding segments.

3. The device of claim 2, wherein the connections are 180°

degrees apart from each other.

4. The device of claim 2, wherein the connections form an articulated joint.

5. The device of claim 1, further including a capture net at the distal end of the device.

6. A clot retrieval device for removing clot from a blood vessel, the device having a collapsed delivery configuration and an expanded deployed configuration and comprising:

a shaft extending between a proximal end and a distal end;

an outer expandable body coupled to the shaft, the outer expandable body comprising at least three longitudinally spaced clot scaffolding segments separated by voids forming a plurality of clot inlet mouths between the adjacent clot scaffolding segments, wherein each clot scaffolding segment includes a plurality of closed cells, wherein at least one closed cell of a plurality of clot scaffolding segments terminates in a distal apex free from connection to an adjacent closed cell; and

an inner expandable body including a plurality of struts,

wherein the outer expandable body at least partially overlying the inner expandable body and being expandable to a radial extent which is greater than the radial extent of the inner expandable body in the deployed configuration to provide a clot reception space radially between the inner expandable body and the outer expandable body.

7. The device of claim 6, wherein the outer expandable body is eccentrically coupled to the shaft.

8. The device of claim 6, wherein each clot inlet mouth is formed by two connections between adjacent clot scaffolding segments.

9. The device of claim 8, wherein the connections are 180°

degrees apart from each other and form an articulated joint between clot scaffolding segments.

10. The device of claim 9, wherein the inner expandable body and the outer expandable body are coupled to the shaft at a common location.

11. The device of claim 6, wherein the at least three scaffolding segments includes a distal most scaffolding segment, and the distal most scaffolding segment includes a closed distal end.

12. The device of claim 6, further including a capture net at the distal end of the device.

13. The device of claim 6, wherein the inner expandable body includes a cylindrical and tubular portion.

14. The device of claim 13, wherein the cylindrical and tubular portion extends completely through a proximal most and a next proximal most scaffolding segment of the at least three clot scaffolding segments.

15. The device of claim 14, wherein the cylindrical and tubular portion extends into a distal most scaffolding segment of the at least three clot scaffolding segments.

16. A clot retrieval device for removing clot from a blood vessel, the device having a collapsed delivery configuration and an expanded deployed configuration and comprising:

a shaft extending between a proximal end and a distal end;

an outer expandable body coupled to the shaft, the outer expandable body comprising at least three longitudinally spaced clot scaffolding segments separated by voids forming a plurality of clot inlet mouths between the adjacent clot scaffolding segments, wherein the outer expandable body is self-expandable; and

an inner expandable body including a plurality of struts,

wherein the outer expandable body at least partially overlying the inner expandable body and being expandable to a radial extent which is greater than the radial extent of the inner expandable body in the deployed configuration to provide a clot reception space radially between the inner expandable body and the outer expandable body, and

wherein at least one of the plurality of scaffolding segments is coupled to another of the plurality of clot scaffolding segments via an articulated joint.

17. The device of claim 16, further including a capture net at the distal end of the device.

18. The device of claim 16, wherein the at least three scaffolding segments includes a distal most scaffolding segment, and the distal most scaffolding segment includes a closed distal end.

19. The device of claim 16, wherein the inner expandable body and the outer expandable body are coupled to the shaft at a common location.

20. The device of claim 16, wherein the inner expandable body includes a cylindrical and tubular portion extending completely through a proximal most and a next proximal most scaffolding segment of the at least three clot scaffolding segments.