DETACHMENT MECHANISMS FOR IMPLANTABLE DEVICES

• US 20170354419A1
• Filed: 02/23/2015
• Published: 12/14/2017
• Est. Priority Date: 01/04/2008
• Status: Active Grant

• Current Assignee: Boston Scientific Scimed, Inc. (Boston Scientific Corporation)
• Original Assignee: Boston Scientific Scimed, Inc. (Boston Scientific Corporation)
• Inventors: TEOH, Clifford, Williams, Michael, Mirigian, Gregory E., Carroll, Kirsten, Anderson, James M., Rassat, Jay, Arcand, Benjamin, Sutermeister, Derek
• Granted Patent: US 10,478,192 B2
• Time in Patent Office: Days
• 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 2017/12068 detachable by heat
• CPC Class Codes: A61B 2017/12077 Joint changing shape upon application of heat, e.g. bi-metal or reversible thermal memory
• CPC Class Codes: A61B 2017/1209 detachable by electrical current or potential, e.g. electroactive polymer

Abstract

Disclosed herein are detachment mechanisms for vaso-occlusive devices that allow for rapid operator-controlled release of the vaso-occlusive device into the selected site. Also disclosed are vaso-occlusive assemblies comprising these detachment mechanisms and methods of using these detachment mechanisms and vaso-occlusive assemblies.

Claims

1-18. -18. (canceled)

19. A detachment mechanism for an implantable device, comprising:

an implantable device that includes a structure extending therefrom;

a delivery device that includes an electroactive polymer configured to move from an unexpanded configuration to an expanded configuration, wherein the delivery device reversibly engages at least a portion of the structure of the implantable device when in the unexpanded configuration.

20. The detachment mechanism of claim 19, wherein the electroactive polymer moves from an unexpanded configuration to an expanded configuration upon application of energy.

21. The detachment mechanism of claim 20, wherein the energy is heat.

22. The detachment mechanism of claim 20, wherein the energy is electrical energy.

23. The detachment mechanism of claim 19, further comprising an energy source, wherein the electroactive polymer is in direct contact with the energy source.

24. The detachment mechanism of claim 19, further comprising an energy source, wherein the electroactive polymer is not in direct contact with the energy source.

25. The detachment mechanism of claim 19, wherein the electroactive polymer does not substantially engage the structure of the implantable device when in the unexpanded configuration.

26. The detachment mechanism of claim 19, wherein the implantable device is a vaso-occlusive coil.

27. A detachment mechanism for an implantable device, comprising:

an implantable device that includes an structure extending therefrom;

a delivery device that includes an electroactive polymer configured to move from an expanded configuration to an unexpanded configuration, wherein the delivery device reversibly engages at least a portion of the structure when the implantable device is in the expanded configuration.

28. The detachment mechanism of claim 27, wherein the electroactive polymer moves from an expanded configuration to an unexpanded configuration upon application of energy.

29. The detachment mechanism of claim 28, wherein the energy is heat.

30. The detachment mechanism of claim 28, wherein the energy is electrical energy.

31. The detachment mechanism of claim 27, further comprising an energy source, wherein the electroactive polymer is in direct contact with the energy source.

32. The detachment mechanism of claim 27 further comprising an energy source, wherein the electroactive polymer is not in direct contact with the energy source.

33. The detachment mechanism of claim 27 wherein the electroactive polymer does not substantially engage the structure of the implantable device when in the expanded configuration.

34. The detachment mechanism of claim 27, wherein the implantable device is a vaso-occlusive coil.