VASO-OCCLUSIVE DELIVERY DEVICE WITH KINK RESISTANT, FLEXIBLE DISTAL END

• US 20070055302A1
• Filed: 06/13/2006
• Published: 03/08/2007
• Est. Priority Date: 06/14/2005
• Status: Active Grant

• Current Assignee: Stryker European Operations Holdings, LLC (Stryker Corporation)
• Original Assignee: Boston Scientific Scimed, Inc. (Boston Scientific Corporation)
• Inventors: Murphy, Richard, Williams, Michael, Teoh, Clifford, Huffmaster, Andrew, Ramzipoor, Kamal, McGill, Scott, Henry, William, Devaney, Hughie, Daly, Charles, Ford, Russell, Duong, Hanh
• Granted Patent: US 9,636,115 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 17/12109 in a blood vessel
• CPC Class Codes: A61B 17/12113 within an aneurysm
• CPC Class Codes: A61B 17/12154 having stretch limiting means
• CPC Class Codes: A61B 2017/1205 Introduction devices
• CPC Class Codes: A61B 2017/12054 Details concerning the detachment of the occluding device from the introduction device
• CPC Class Codes: A61B 2017/12063 electrolytically detachable
• CPC Class Codes: A61M 2025/09133 having specific material compositions or coatings; Materials with specific mechanical behaviours, e.g. stiffness, strength to transmit torque
• CPC Class Codes: A61M 25/09 Guide wires

Abstract

A device for delivering an occlusive element includes an elongate sheath having a lumen therein. An elongate core member is disposed within the lumen and is formed from a proximal portion and distal portion connected via a joint. The distal portion of the elongate member includes a severable junction secured to the occlusive element. A marker coil is coaxially arranged around the distal portion of the elongate core member and is partially disposed inside the sheath lumen. A coil member is coaxially arranged around the distal portion of the elongate core member and coaxially arranged around at least a portion of the marker coil extending outside the lumen of the sheath. The coil member is secured at a distal end thereof to the distal portion of the elongate core member. The device resists axial compression while allowing for radial bending.

Claims

1. A device for delivering a vaso-occlusive coil comprising:

an elongate sheath having a lumen therein;

an elongate core member disposed within the lumen of the sheath, the elongate core member including a proximal portion joined to a distal portion at a joint, the distal portion including a severable junction coupled to a vaso-occlusive coil;

a marker coil coaxially arranged around the distal portion of the elongate core member and partially disposed inside the lumen of the sheath; and

a coil member coaxially arranged around the distal portion of the elongate core member and further coaxially arranged around at least a portion of the marker coil, the coil member further being secured at a distal end thereof to the distal portion of the elongate core member.

2. The device of claim 1, wherein the distal portion of the core member includes a hook that is secured to one or more proximal windings of the vaso-occlusive coil.

3. The device of claim 2, wherein the interface between the hook and the one or more proximal windings of the vaso-occlusive coil is covered with an adhesive.

4. The device of claim 2, wherein the one or more proximal windings are crimped about a portion of the hook.

5. The device of claim 2, further comprising a stretch resistant filament secured at one end to the hook and at another end to the vaso-occlusive coil.

6. The device of claim 1, further comprising a delivery catheter having a lumen therein, the vaso-occlusive coil delivery device being slidable therein.

8. The device of claim 1, wherein the joint is contained within a segment of hypotube.

7. The device of 1, wherein the coil member is secured to the distal portion of the elongate core member via a stopper coil and adhesive.

9. A device for delivering a vaso-occlusive coil comprising:

an elongate sheath having a lumen therein;

an elongate core member disposed within the lumen of the sheath, the elongate core member including a proximal portion joined to a distal portion at a joint, the distal portion including a severable junction coupled to a vaso-occlusive coil;

a spacer member coaxially arranged around the distal portion of the elongate core member and disposed inside the lumen of the sheath at a location distal with respect to the joint;

a marker coil coaxially arranged around the distal portion of the elongate core member and disposed inside the lumen of the sheath at a location distal with respect to the spacer member; and

a coil member coaxially arranged around the distal portion of the elongate core member and at least a portion of the marker coil, the coil member further being secured at a distal end thereof to the distal portion of the elongate core member.

10. The device of claim 9, wherein the coil member is secured to the distal portion of the elongate core member via a stopper coil and adhesive.

11. The device of claim 9, wherein the joint is contained within a segment of hypotube.

12. The device of claim 9, wherein the spacer member comprises a polyimide material.

13. The device of claim 9, wherein the distal portion of the core member in the region of the severable junction has a diameter within the range of about 0.001″

to about 0.0025″

.

14. The device of claim 9, wherein the coil member comprises a stainless steel coil.

15. The device of claim 9, wherein the distal portion of the core member includes a hook that is secured to one or more proximal windings of the vaso-occlusive coil.

16. The device of claim 15, wherein the interface between the hook and the one or more proximal windings of the vaso-occlusive coil is covered with an adhesive.

17. The device of claim 15, wherein the one or more proximal windings are crimped about a portion of the hook.

18. The device of claim 15, further comprising a stretch resistant filament secured at one end to the hook and at another end to the vaso-occlusive coil.

19. The device of claim 15, further comprising a delivery catheter having a lumen therein, the vaso-occlusive coil delivery device being slidable therein.

20. A method of loading a vaso-occlusive coil on a delivery device comprising:

providing a delivery device including elongate core member having a severable junction and a hook disposed at a distal end thereof;

crimping one or more proximal windings of the vaso-occlusive coil;

inserting the hook into a lumen of the crimped portion of the vaso-occlusive coil;

rotating the hook about a long axis of the elongate core member; and

retracting the elongate core member proximally.

21. The method of claim 20, further comprising the step of applying an adhesive to the interface between the hook and the one or more proximal windings of the vaso-occlusive coil.

22. The method of claim 20, wherein the hook is rotated about 90°

.

23. The method of claim 20, further comprising the step of securing the hook to a stretch resistant filament disposed within a lumen of the vaso-occlusive coil.

24. A device for delivering a vaso-occlusive coil comprising:

an elongate pusher member including a proximal portion joined to a distal portion at a joint, the distal portion including a severable junction coupled to a vaso-occlusive coil;

a marker coil coaxially arranged around the elongate pusher member about the joint; and

a reinforcing member coaxially arranged about the distal portion of the elongate pusher member distal with respect to the marker coil and proximal with respect to the severable junction, the reinforcing member including an inner coil and an outer coil.

25. The device of claim 24, further comprising an insulating sheath surrounding the marker coil and at least a portion of the reinforcing member.

26. The device of claim 24, wherein the distal portion of the elongate pusher member terminates in a loop back coil section.

27. The device of claim 24, wherein the loop back coil section is disposed inside a lumen of the vaso-occlusive coil.

28. The device of claim 24, wherein the severable junction comprises an electrolytically severable junction.

29. The device of claim 24, further comprising a distal stop secured to the pusher member distal with respect to the reinforcing member.

30. The device of claim 24, further comprising a proximal stop secured to the pusher member proximal with respect to the reinforcing member.

31. The device of claim 24, further comprising a catheter having a lumen disposed therein, the vaso-occlusive delivery device being slidably disposed therein.

32. The device of claim 24, wherein the reinforcing member is configured to resist axial compression while allowing radial bending.

33. The device of claim 24, wherein the inner coil of the reinforcing member has a substantially closed pitch.

34. The device of claim 24, wherein the outer coil of the reinforcing member has an open pitch that is less than or equal to about 20% of the wire diameter.