Vaso-occlusive delivery device with kink resistant, flexible distal end

• US 9,636,115 B2
• Filed: 06/13/2006
• Issued: 05/02/2017
• Est. Priority Date: 06/14/2005
• Status: Active Grant

• Current Assignee: Stryker European Operations Holdings, LLC (Stryker Corporation)
• Original Assignee: Stryker Corporation, Stryker European Holdings I, LLC (Stryker Corporation)
• Inventors: Henry, William S., Daly, Charles, Ford, Russell, Duong, Hanh, Ramzipoor, Kamal, Teoh, Clifford, Murphy, Richard, Huffmaster, Andrew, McGill, Scott, Williams, Michael D., Devaney, Hughie
• Primary Examiner(s): YABUT, DIANE D
• Application Number:
  US11/423,934
• Publication Number:
  US 20070055302A1
• Time in Patent Office: 3,976 Days
• Field of Search: 606200, 600585
• 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 vaso-occlusive assembly, comprising:

an elongate sheath having a wall and defining an axial lumen;

respective proximal and distal elongate core members disposed within the lumen of the sheath, wherein the proximal elongate core member is joined to the distal elongate core member at a joint located within the sheath lumen, the distal elongate core member including a severable junction;

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

a coil member coaxially arranged around the distal 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 elongate core member; and

a vaso-occlusive coil coupled to the distal elongate core member at a location distal to the severable junction.

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

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

5. The assembly 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 assembly of claim 1, further comprising a delivery catheter defining an axial lumen, the vaso-occlusive assembly being slidable through the lumen of the delivery catheter.

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

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

9. A vaso-occlusive assembly, comprising:

an elongate sheath having a wall and defining an axial lumen therethrough;

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;

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

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

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; and

a vaso-occlusive coil coupled to the distal portion of the core member at a location distal to the severable junction.

10. The assembly 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 assembly of claim 9, wherein the joint is contained within a segment of hypotube.

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

13. The assembly 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 assembly of claim 9, wherein the coil member comprises a stainless steel coil.

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

18. The assembly 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 assembly of claim 15, further comprising a delivery catheter defining an axial lumen therethrough, the vaso-occlusive assembly being slidable through the lumen of the delivery catheter.