Magnetic attachment systems

• US 20040176797A1
• Filed: 03/04/2003
• Published: 09/09/2004
• Est. Priority Date: 03/04/2003
• Status: Active Grant

• Current Assignee: WL Gore and Associates Incorporated (W.L. Gore and Associates)
• Original Assignee: NMT Medical Incorporated
• Inventors: Opolski, Steven W.
• Granted Patent: US 7,618,435 B2
• Time in Patent Office: Days
• US Class Current: 606/213
• CPC Class Codes: A61B 17/076 for removing surgical staples or wound clamps
• 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 17/12131 characterised by the type of occluding device
• CPC Class Codes: A61B 2017/00575 for closure at remote site, e.g. closing atrial septum defects
• CPC Class Codes: A61B 2017/00592 Elastic or resilient implements
• CPC Class Codes: A61B 2017/00615 Implements with an occluder on one side of the opening and holding means therefor on the other
• CPC Class Codes: A61B 2017/00876 magnetic
• CPC Class Codes: A61B 2017/1205 Introduction devices
• CPC Class Codes: A61B 2017/12086 magnetically detachable

Abstract

A magnetic attachment device is provided for use in a transcatheter delivery The system may be useful for delivering, repositioning, and removal of an implant, a septal occluder, in or out of a patient.

Claims

1. An interventional transcatheter delivery system for delivering or relocating an implant in a patient, the system comprising:

an elongated tubular portion defining a lumen;

a core wire comprising a distal end and having a longitudinal axis, the core wire slidingly moveable in the lumen of the tubular portion;

an attachment device positioned at the distal end of the core wire and comprising a curved attachment surface; and

an implant comprising a target surface magnetically attachable to the attachment surface, wherein the two surfaces allow the implant to pivot relative to the longitudinal axis of the core wire.

2. The system of claim 1 wherein the attachment surface of the attachment device is magnetic.

3. The system of claim 2 wherein the attachment device is electromagnetic.

4. The system of claim 2 wherein the attachment device comprises a permanent magnet.

5. The system of claim 4 wherein the permanent magnet comprises a rare earth magnet.

6. The system of claim 1 wherein the target surface of the implant is magnetic.

7. The system of claim 6 wherein the implant comprises a permanent magnet.

8. The system of claim 1 wherein one of the attachment surface of the attachment device and the target surface of the implant is substantially concave and the other is substantially convex.

9. The system of claim 8 wherein the substantially convex surface is substantially spherical.

10. The system of claim 1 wherein both the attachment surface of the attachment device and the target surface of the implant are substantially spherical.

11. The system of claim 10 wherein the attachment surface and the target surface interlock within the lumen of the tubular portion.

12. The system of claim 1 further comprising a releasing element for releasing the implant from the attachment device.

13. The system of claim 12 wherein the releasing element comprises a pushrod.

14. The system of claim 12 wherein the releasing element comprises a tubular member.

15. The system of claim 14 wherein the attachment surface comprises a first substantially spherical surface of a first diameter, the target surface comprises a second substantially spherical surface of a second diameter, and the tubular component has a diameter that is no smaller than the first diameter and no larger than the second diameter.

16. The system of claim 1 wherein the implant comprises a septal occluder.

17. The system of claim 1 wherein the implant pivots relative to the longitudinal axis of the core wire for no less than 90 degrees.

18. An interventional transcatheter delivery system for delivering or relocating an implant in a patient, the system comprising:

an elongated tubular portion comprising a distal sleeve section having a longitudinal axis, the distal sleeve section comprising an attachment surface; and

an implant comprising a target surface magnetically attachable to the attachment surface.

19. The system of claim 18 wherein the target surface of the implant is substantially convex.

20. The system of claim 18 wherein the attachment surface of the distal sleeve section is smooth and curved.

21. The system of claim 18 wherein the attachment surface of the distal sleeve section is magnetic.

22. The system of claim 21 wherein the distal sleeve section is electromagnetic.

23. The system of claim 21 wherein the distal sleeve section comprises a permanent magnet.

24. The system of claim 23 wherein the permanent magnet comprises a rare earth magnet.

25. The system of claim 18 wherein the target surface of the implant is magnetic.

26. The system of claim 25 wherein the implant comprises a permanent magnet.

27. The system of claim 18 further comprising a releasing element for releasing the implant from the distal sleeve.

28. The system of claim 27 wherein the releasing element comprises a pushrod.

29. The system of claim 18 wherein the implant comprises a septal occluder.