SPRING DETACH JOINT FOR DELIVERING A DETACHABLE IMPLANTABLE DEVICE

• US 20090036877A1
• Filed: 07/31/2008
• Published: 02/05/2009
• Est. Priority Date: 08/01/2007
• Status: Active Grant

• Current Assignee: Boston Scientific Scimed, Inc. (Boston Scientific Corporation)
• Original Assignee: Boston Scientific Scimed, Inc. (Boston Scientific Corporation)
• Inventors: Fedas, Nicholas, Nardone, Christopher
• Granted Patent: US 8,500,773 B2
• Time in Patent Office: Days
• US Class Current: 606/1
• 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 17/1214 Coils or wires
• CPC Class Codes: A61B 2017/12054 Details concerning the detachment of the occluding device from the introduction device

Abstract

Methods and systems for delivering an implantable device to a target site, using a detachable link. The system can include an embolic coil mated to a delivery wire via a detachable link comprising first and second engaging members. When the detachable link is delivered through a catheter, the first and second engaging members are configured to self-detach.

Claims

1. An implant delivery system, comprising:

an elongate device having a lumen;

an implantable device mated to a delivery wire via a detachable link comprising at least a first and a second engaging member;

the first engaging member having an inner and outer surface and an expandable member adapted to move between a first and a second position, wherein in the first position an outer diameter of the expandable member is larger than an inner diameter of the lumen and in the second position the outer diameter of the expandable member is smaller than the inner diameter of the lumen, and wherein in the first position an inner diameter of the expandable member is larger than the inner diameter of the expandable member in the second position; and

the second engaging member having an outer surface shaped and sized for receipt at least partially within the inner surface of the first engaging member when the expandable member is in the first position and wherein the second engaging member is shaped and sized to inhibit movement out of the inner surface of the first engaging member when the expandable member is in the second position.

2. The system of claim 1, wherein the expandable member is biased in the first position.

3. The system of claim 1, wherein the first engaging member includes a wall defining a cavity adapted to receive the second engaging member.

4. The system of claim 3, wherein expandable member is defined by a portion of the wall.

5. The system of claim 3, wherein the wall is formed from a non-rigid material.

6. The system of claim 3, wherein the wall is deformable.

7. The system of claim 1, wherein the outer surface of the second engaging member includes a recess adapted to receive a portion of the expandable member when the expandable member is in the second position.

8. The system of claim 1, wherein the second engaging member is formed of a resilient material.

9. The system of claim 1, wherein the expandable member includes an articulating locking member.

10. The system of claim 1, wherein the first engaging member is attached to the delivery wire and the second engaging member is attached to the implantable device.

11. The system of claim 1, wherein the first engaging member is comprised of a resilient material.

12. A detachable link system for delivering an implant from an elongate device having a lumen, the system comprising:

a detachable link comprising first and second engaging members,

the first engaging member having a wall with an inner and outer surface and a locking member configured to articulate relative to the wall and adapted to move between a first and a second position, wherein in the first position an outer diameter of the first engaging member is larger than an inner diameter of the lumen and in the second position the outer diameter of the first engaging member is smaller than the inner diameter of the lumen, and wherein in the first position an inner diameter of the first engaging member is larger than the inner diameter of the first engaging member in the second position, and

the second engaging member having an outer surface shaped and sized for receipt at least partially within the inner surface of the first engaging member when the locking member is in the first position and wherein the locking member is adapted to mate with the second engaging member when in the second position and inhibit detaching of the detachable link.

13. The system of claim 12, wherein the detachable link has an elongate body that extends in a longitudinal direction.

14. The system of claim 13, wherein the locking member includes an elongate body that extends in a non-longitudinal direction with respect to the detachable link.

15. The system of claim 12, wherein the locking member is biased in the first position.

16. An implant delivery system, comprising:

an elongate device having a lumen;

an implantable device mated to a delivery wire via a detachable link comprising first and second engaging members;

the first engaging member including a body and having a first arm and a second arm extending therefrom, each arm having an inner and outer surface and the arms defining a mating area therebetween, at least one of the first and second arms adapted to articulate relative the first engaging member body to move between a locked and unlocked position, wherein in the unlocked position an outer distance between the outer surfaces of the arms is larger than an inner diameter of the lumen and wherein in the locked position the outer distance is smaller than the inner diameter of the lumen; and

the second engaging member having an outer surface shaped and sized for receipt at least partially between inner surfaces of the arms in the unlocked position and shaped and sized to inhibit movement out of the mating area in the locked position.

17. The system of claim 16, wherein at least one of the first and second arms is biased in the unlocked position.

18. The system of claim 16, wherein at least one of the first and second arms is mated to the first engaging member body via a living hinge.

19. The system of claim 16, wherein the first and second arms mechanically engage the second engaging member in the locked position.

20. A method of delivering an implantable device, the method comprising the steps of:

providing a catheter having an inner lumen and distal opening, an implantable device mated to a delivery wire via a detachable link, the detachable link including an expandable member adapted to move between a first and a second position, wherein in the first position an outer diameter of the expandable member is larger than an inner diameter of the lumen and in the second position the outer diameter of the expandable member is smaller than the inner diameter of the lumen, and wherein in the first position an inner diameter of the expandable member is larger than the inner diameter of the expandable member in the second position, the second engaging member having an outer surface shaped and sized for receipt at least partially within an inner surface of the first engaging member when the expandable member is in the first position and wherein the second engaging member is shaped and sized to inhibit movement out of the inner surface of the first engaging member when the expandable member is in the second position; and

moving the expandable member from the second position to the first position by delivering the detachable link through a distal opening in the catheter.

21. The method of claim 20, further comprising allowing the second engaging member to self-detach from the first engaging member after the step of moving the expandable member from the first position to the second position.

22. The method of claim 21, wherein the step of moving the expandable member includes pushing delivery wire.

23. A method of manufacture, the method comprising the steps of:

providing an elongate body having an inner lumen, a first engaging member, and a second engaging member, wherein the first engaging member includes an expandable member adapted to move between a first and a second position, wherein in the first position an outer diameter of the expandable member is larger than an inner diameter of the lumen and in the second position the outer diameter of the expandable member is smaller than the inner diameter of the lumen, and wherein in the first position an inner diameter of the expandable member is larger than the inner diameter of the expandable member in the second position, the second engaging member having an outer surface shaped and sized for receipt at least partially within an inner surface of the first engaging member when the expandable member is in the first position and wherein the second engaging member is shaped and sized to inhibit movement out of the inner surface of the first engaging member when the expandable member is in the second position;

placing the second engaging member at least partially within the first engaging member; and

moving the expandable member from the first position to the second position by inserting the first and second engaging members into the lumen of the elongate body.