Stretch resistant vaso-occlusive coils

• US 5,582,619 A
• Filed: 06/30/1995
• Issued: 12/10/1996
• Est. Priority Date: 06/30/1995
• Status: Expired due to Term

• Current Assignee: Stryker European Operations Holdings, LLC (Stryker Corporation)
• Original Assignee: Target Therapeutics, Inc. (Boston Scientific Corporation)
• Inventors: Ken, Christopher G. M.
• Primary Examiner(s): Buiz, Michael Powell
• Assistant Examiner(s): TRUONG, KEVIN THAO
• Application Number:
  US08/497,331
• Time in Patent Office: 529 Days
• Field of Search: 606/151, 606/213, 606/191, 606/108, 606/157, 606/158, 606/194, 606/195, 623/1, 623/12, 623/53, 623/164
• US Class Current: 606/191
• 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 17/1215 comprising additional materials, e.g. thrombogenic, having filaments, having fibers, being coated
• CPC Class Codes: A61B 17/12154 having stretch limiting means
• CPC Class Codes: A61B 2017/12063 electrolytically detachable

Abstract

This invention is an implantable vaso-occlusive device. It is typically a vaso-occlusive coil comprised of a primary helically wound coil which is then wound into a secondary shape. Central to the invention is the use of a stretch-resisting member fixedly attached within at least a portion of the primary coil. This stretch-resisting member is for the primary purpose of preventing stretching of the coil during movement of the coil e.g., by retrieval or repositioning after deployment. The device typically has a self-forming secondary shape made from a pre-formed primary linear helically wound, although it need not have the secondary form. Fibers may be introduced onto the device and affixed to the pre-formed linear member. The constituent member may be also be covered with a fibrous braid. The device is typically introduced through a catheter. The device is passed axially through the catheter sheath and assumes its form upon exiting the catheter without further action.

Claims

1. A vaso-occlusive device comprising:

i.) an outer helically wound primary coil having a first end and a second end, defining a lumen between said first end and second end, and

ii.) a stretch-resisting member extending through said lumen and fixedly attached to said first end and second ends.

2. The device of claim 1 additionally comprising a deployment tip attached to at least one of the first end and second end.

3. The device of claim 2 wherein the deployment tip comprises a joint adapted to mechanically attach to and detach from a pusher.

4. The device of claim 2 wherein the deployment tip comprises an electrolytically detachable end adapted to detach from a pusher by imposition of a current on said pusher.

5. The device of claim 1 wherein the stretch resisting member comprises a wire.

6. The device of claim 1 wherein the stretch resisting member comprises a helical coil.

7. The device of claim 1 where the device has a secondary form.

8. The device of claim 1 comprising a metal selected from the group consisting of platinum, palladium, rhodium, gold, tungsten, and their alloys.

9. The device of claim 8 comprising an alloy of platinum and tungsten.

10. The device of claim 1 comprising an alloy selected from the group consisting of stainless steels and super-elastic alloys.

12. The device of claim 1 comprising a polymer containing a radio-opaque filler.

13. The device of claim 1 additionally comprising filamentary material attached to said primary coil.

11. The device of claim 11 comprising nitinol.