Clot retrieval device for removing clot from a blood vessel

• US 10,292,722 B2
• Filed: 12/31/2015
• Issued: 05/21/2019
• 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 V
• Application Number:
  US14/986,323
• Publication Number:
  US 20160192953A1
• Time in Patent Office: 1,237 Days
• 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 a 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 having a step-up;

a first body having a plurality of struts and a proximally extending partial circumferential member disposed about the shaft and extended proximally from at least one of the plurality of struts, the proximally extending partial circumferential member being proximal of the step-up and couplable against the step-up; and

a second body having a plurality of struts and a collar on a proximal end of at least one of the plurality of struts, the partial circumferential member and the shaft being positioned within a lumen extending through the collar.

2. The device of claim 1, wherein in the expanded deployed configuration, the second body is expandable about the first body and to a greater radial extent than the first body.

3. The device of claim 2, wherein the partial circumferential member and the collar are eccentric relative to a central longitudinal axis of the step-up feature.

4. The device of claim 2, wherein the partial circumferential member, the collar, the shaft, and the step-up feature collectively form a mechanical lock.

5. The device of claim 4, wherein the mechanical lock further comprises one or more of adhesive, solder, a weld, and a braze.

6. The device of claim 1, wherein each of the first and second body are self-expandable.

7. A clot retrieval device for removing a 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 having a step-up;

a first body having a plurality of struts and a proximally extending partial circumferential member disposed about the shaft and extended proximally from at least one of the plurality of struts, the proximally extending partial circumferential member being proximal of the step-up and couplable against the step-up; and

a second body having a plurality of struts and a full circumferential member on a proximal end of at least one of the plurality of struts, the partial circumferential member and the shaft being positioned within a lumen extending through the full circumferential member.

8. The device of claim 7, wherein in the expanded deployed configuration, the second body is expandable about the first body and to a greater radial extent than the first body.

9. The device of claim 8, wherein the partial circumferential member and the full circumferential member are eccentric relative to a central longitudinal axis of the step-up feature.

10. The device of claim 8, wherein the partial circumferential member, the full circumferential member, the shaft, and the step-up feature collectively form a mechanical lock.

11. The device of claim 10, wherein the mechanical lock further comprises one or more of adhesive, solder, a weld, and a braze.

12. The device of claim 7, wherein the full circumferential member includes at least one of a tube, a collar, and a ring.

13. The device of claim 7, wherein each of the first and second body are self-expandable.

14. The device of claim 7, wherein the partial circumferential member includes a strut extending proximally of a proximal end of the partial circumferential member, the strut configured to be received radially between the shaft and a coil.

15. A clot retrieval device for removing a 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 having a step-up;

a first self-expandable body having a plurality of struts and a proximally extending tab member disposed adjacent the shaft and extended proximally from at least one of the plurality of struts, the proximally extending tab member being proximal of the step-up and couplable against the step-up; and

a second self-expandable body having a plurality of struts and a full circumferential member on a proximal end of at least one of the plurality of struts, the tab member and the shaft being positioned within a lumen extending through the full circumferential member.

16. The device of claim 15, wherein in the expanded deployed configuration, the second body is expandable about the first body and to a greater radial extent than the first body.

17. The device of claim 16, wherein the tab member and the full circumferential member are eccentric relative to a central longitudinal axis of the step-up feature.

18. The device of claim 16, wherein the tab member, the full circumferential member, the shaft, and the step feature form a mechanical lock.

19. The device of claim 18, wherein the mechanical lock further comprises one or more of adhesive, solder, a weld, and a braze.

20. The device of claim 15, wherein the full circumferential member includes at least one of a tube, a collar, and a ring.