ANCHOR ASSEMBLIES IN STRETCH-RESISTANT VASO-OCCLUSIVE COILS

• US 20070112375A1
• Filed: 12/29/2006
• Published: 05/17/2007
• Est. Priority Date: 06/27/2002
• Status: Active Grant

• Current Assignee: Stryker European Operations Holdings, LLC (Stryker Corporation)
• Original Assignee: Boston Scientific Scimed, Inc. (Boston Scientific Corporation)
• Inventors: Aganon, Nestor, Pizarro, Maria, Huang, Ann, Minck, John
• Granted Patent: US 7,938,845 B2
• Time in Patent Office: Days
• US Class Current: 606/200
• CPC Class Codes: A61B 17/12022 Occluding by internal devices, e.g. balloons or releasable wires plugging an opening in the wall of an organ A61B17/0057; occluders for the cervical canal A61F6/146; vas deferens occluders A61F6/20
• CPC Class Codes: A61B 17/12113 within an aneurysm
• CPC Class Codes: A61B 17/12145 having a pre-set deployed three-dimensional shape methods of manufacturing A61B2017/00526
• CPC Class Codes: A61B 17/12154 having stretch limiting means
• CPC Class Codes: A61B 2017/1205 Introduction devices
• CPC Class Codes: A61B 2017/12063 electrolytically detachable
• CPC Class Codes: A61B 2017/12095 Threaded connection

Abstract

Vaso-occlusive devices are provided for occluding an aneurysm within the human vasculature. The vaso-occlusive device also includes a stretch-resisting member that extends through at least a portion of a lumen of the primary coil and is directly or indirectly attached to the primary coil at two locations axially separated from each other to prevent or minimize axial stretching of the primary coil. At one location, the stretch-resisting member is coupled to the primary coil via a flexible anchor assembly disposed within the lumen. In one embodiment, the anchor assembly may comprise an anchor coil and a link directly or indirectly coupled between the anchor coil and the stretch-resisting member. Alternatively, the anchor assembly may comprise a chain of twisted links.

Claims

1. A vaso-occlusive device, comprising:

an outer primary coil having a proximal end, a distal end, and a lumen;

a stretch-resisting member extending through at least a portion of the coil lumen and being coupled to the primary coil; and

an anchor assembly located within the coil lumen, the anchor assembly comprising an anchor coil and a link fixedly coupled between the anchor coil and the stretch-resisting member, the link forming a flexible joint with the anchor coil.

2. The device of claim 1, wherein the link is directly attached between the anchor coil and the stretch-resisting, member.

3. The device of claim 1, wherein the primary coil is helically wound.

4. The device of claim 1, wherein the link is laser cut.

5. The device of claim 1, wherein the link is selected from the group consisting of polyesters, polyesters, and polyolefins.

6. The device of claim 1, wherein the stretch-resisting member comprises at least one polymeric filament.

7. The device of claim 1, wherein a distal end of the stretch-resisting member is coupled to the distal end of the primary coil and a proximal end of the stretch-resisting member is coupled to the link.

8. The device of claim 7, wherein the distal end of the stretch-resisting member is directly attached to the distal end of the primary coil.

9. The device of claim 1, wherein the anchor assembly is coupled to the proximal end of the primary coil.

10. The device of claim 1, further comprising a filler material disposed within the coil lumen adjacent the anchor coil.

11. The device of claim 10, wherein the filler material is selected from the group consisting of polyethyleneterephthalate (PET), polyamide, silicon, and polyurethane.

12. The device of claim 1, further comprising a deployment mechanism coupled to the proximal end of the primary coil.

13. The device of claim 12, wherein the deployment mechanism comprises an electrolytically severable junction adapted to detach from a core wire by imposition of an electric current on the core wire.

14. The device of claim 1, wherein the primary coil is sized to fit within an aneurysm.

15. A catheter assembly for occluding a body cavity, comprising:

a delivery device having a distal end; and

a vaso-occlusive device associated with the distal end of the delivery device, the vaso-occlusive device comprising;

an outer primary coil having a proximal end, a distal end, and a lumen;

a stretch-resisting member extending through at least a portion of the coil lumen and being coupled to the primary coil; and

an anchor assembly located within the coil lumen, the anchor assembly comprising an anchor coil and a link fixedly coupled between the anchor coil and the stretch-resisting member, the link forming a flexible joint with the anchor coil.

16. The catheter assembly of claim 15, wherein the link is directly attached between the anchor coil and the stretch-resisting member.

17. The catheter assembly of claim 15, wherein the stretch-resisting member comprises at least one polymeric filament.

18. The catheter assembly of claim 15, wherein a distal end of the stretch-resisting member is coupled to the distal end of the primary coil and a proximal end of the stretch-resisting member is coupled to the link.

19. The catheter assembly of claim 18, wherein the distal end of the stretch-resisting member is directly attached to the distal end of the primary coil.

20. The catheter assembly of claim 15, wherein the anchor assembly is coupled to the proximal end of the primary coil.

21. The catheter assembly of claim 15, wherein the vaso-occlusive device is detachably connected via an electrolytic joint.

22. The catheter assembly of claim 15, wherein the body cavity comprises an aneurysm.

23. The catheter assembly of claim 15, further comprising a catheter, wherein the delivery device is a core wire slidably disposed within the catheter, wherein the vaso-occlusive device is detachably coupled to the core wire.