MECHANICALLY DETACHABLE VASO-OCCLUSIVE DEVICE

• US 20080306504A1
• Filed: 11/20/2007
• Published: 12/11/2008
• Est. Priority Date: 11/20/2006
• Status: Active Grant

• Current Assignee: Boston Scientific Scimed (Boston Scientific Corporation)
• Original Assignee: Boston Scientific Scimed (Boston Scientific Corporation)
• Inventors: Que, Like, Huang, Ann, Chang, Esther, Win, Thazin
• Granted Patent: US 8,834,515 B2
• Time in Patent Office: Days
• 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 17/12109 in a blood vessel
• CPC Class Codes: A61B 17/12113 within an aneurysm
• CPC Class Codes: A61B 17/1214 Coils or wires
• CPC Class Codes: A61B 17/12145 having a pre-set deployed three-dimensional shape methods of manufacturing A61B2017/00526
• CPC Class Codes: A61B 2017/0053 Loading magazines or sutures into applying tools
• 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 2017/12095 Threaded connection
• CPC Class Codes: Y10T 29/49826 Assembling or joining

Abstract

A device for delivering an occlusive element includes an elongate pusher member having a lumen. A locking member is disposed within the lumen of the elongate pusher member. A moveable elongate releasing member is disposed within the lumen of the elongate pusher member. A filament is secured to the distal end of the elongate releasing member. The occlusive member is locked to the elongate releasing member when the filament passes through a securing member on the occlusive member and is pinched or wedged between the locking member and the elongate releasing member. The occlusive element is in an unlocked state when the elongate releasing member is retracted proximally relative to the elongate pusher member. The filament, along with the elongate releasing member, are retracted proximally until the filament is detached or uncoupled from the securing member of the occlusive member.

Claims

1. A device for delivering an occlusive element comprising:

an elongate pusher member having a distal end and a proximal end and a lumen extending between the distal and proximal ends;

a locking member disposed in the lumen of the elongate pusher member;

an elongate releasing member having a distal end and a proximal end, the distal end including a filament attached thereto, the elongate releasing member being moveable within the lumen of the elongate pusher member; and

an occlusive element including a securing member positioned at a proximal end, wherein the securing member is locked to the elongate releasing member when the filament passes through the securing member and is pinched between the locking member and the elongate releasing member and unlocked when the elongate releasing member is retracted proximally relative to the elongate pusher member.

2. The device of claim 1, wherein the locking member includes one of an edge or surface that pinches the filament against the elongate releasing member.

3. The device of claim 1, the elongate releasing member including a tapered portion, wherein the filament is pinched between the tapered portion and the locking member in a locked configuration.

4. The device of claim 1, further comprising a blocking member disposed at a distal end of the elongate pusher member, the blocking member including an aperture dimensioned to receive the filament but prevent passage of the securing member.

5. The device of claim 1, the distal end of the elongate pusher member having a stiffness that is less than the stiffness of the proximal end of the elongate pusher member.

6. The device of claim 5, wherein the distal end of the elongate pusher member comprises a coil member.

7. A device for delivering an occlusive element comprising:

an elongate pusher member having a distal end and a proximal end and a lumen extending between the distal and proximal ends;

a coil member secured to the distal end of the elongate pusher member;

a locking member disposed in the lumen of the elongate pusher member;

an elongate releasing member having a distal end and a proximal end, the distal end including a filament attached thereto, the elongate releasing member being moveable within the lumen of the elongate pusher member; and

an occlusive element including a securing member positioned at a proximal end, wherein the securing member is locked to the elongate releasing member when the filament passes through the securing member and is wedged between the locking member and the elongate releasing member and unlocked when the elongate releasing member is retracted proximally relative to the elongate pusher member.

8. The device of claim 7, wherein the locking member includes one of an edge or surface that pinches the filament against the elongate releasing member.

9. The device of claim 7, the elongate releasing member including a tapered portion, wherein the filament is wedged between the tapered portion and the locking member in a locked configuration.

10. The device of claim 7, further comprising a blocking member disposed at a distal end of the coil member, the blocking member including an aperture dimensioned to receive the filament but prevent passage of the securing member.

11. The device of claim 10, wherein the blocking member is disposed inside a lumen of the coil member.

12. A method of making a vaso-occlusive coil delivery device comprising:

loading a vaso-occlusive coil on a distal end of an elongate pusher member by passing a filament coupled to an elongate releasing member through a securing member of the vaso-occlusive coil; and

locking the vaso-occlusive coil to the elongate pusher member by advancing the elongate releasing member distally within the elongate pusher member so as to wedge the filament between the elongate releasing member and a locking surface of the elongate pusher member.

13. The method of claim 12, wherein the locking surface of the elongate pusher member comprises a locking member disposed within a lumen of the elongate pusher member.

14. The method of claim 12, wherein the elongate pusher member includes a flexible distal end.

15. The method of claim 12, wherein a blocking member is disposed at a distal end of the elongate pusher member, the blocking member including an aperture dimensioned to receive the filament but prevent passage of the securing member.

16. The method of claim 12, wherein during the step of loading the vaso-occlusive coil, the filament is retracted proximally.

17. A method of deploying a vaso-occlusive coil from a delivery device according to claim 12, further comprising:

positioning the vaso-occlusive coil adjacent to a deployment site; and

retracting the elongate releasing member proximally relative to the elongate pusher member so as to release the vaso-occlusive coil from the filament.

18. The method of claim 17, further comprising the step of removing the elongate pusher member from a patient.

19. The method of claim 17, further comprising locking the elongate releasing member relative to the elongate pusher member after loading the vaso-occlusive coil.

20. The method of claim 19, further comprising unlocking the elongate releasing member relative to the elongate pusher member prior to release of the vaso-occlusive coil.