Energy activated preloaded detachment mechanisms for implantable devices

• US 20090275971A1
• Filed: 10/30/2008
• Published: 11/05/2009
• Est. Priority Date: 10/30/2007
• Status: Abandoned Application

• Current Assignee: Boston Scientific Scimed, Inc. (Boston Scientific Corporation)
• Original Assignee: Boston Scientific Scimed, Inc. (Boston Scientific Corporation)
• Inventors: Kelleher, Brian, Stone, Corbett, Yurek, Matt
• Application Number:
  US12/290,651
• Publication Number:
  US 20090275971A1
• 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 17/12113 within an aneurysm
• CPC Class Codes: A61B 17/1214 Coils or wires
• CPC Class Codes: A61B 18/1492 having a flexible, catheter-like structure, e.g. for heart ablation A61B18/1477 takes precedence
• CPC Class Codes: A61B 2017/12054 Details concerning the detachment of the occluding device from the introduction device
• CPC Class Codes: A61B 2017/12059 Joint of soluble material
• CPC Class Codes: A61B 2017/12068 detachable by heat
• CPC Class Codes: A61B 2017/12072 the heat created by laser light

Abstract

Described herein are energy-activated preloaded detachment mechanisms for implantable devices and assemblies comprising these detachment mechanisms. Also provided are methods of using the detachment mechanisms and assemblies.

Claims

1. An assembly for an implantable device comprising:

a delivery device;

an implantable device;

an element having first and second positions, wherein, in the first position, the element (i) holds the implantable device within the delivery device and (ii) comprises a source of potential energy; and

an energy-activated locking mechanism for changing the element from the first and second positions upon the application of energy.

2. The assembly of claim 1, further comprising a sleeve surrounding at least a portion of the implantable device.

3. The assembly of claim 2, further comprising a jaw structure within the sleeve, wherein the jaw structure secures the implantable device when the element having first and second positions is in the first position.

4. The assembly of claim 1, wherein the energy-activated locking mechanism is selected from the group consisting of salt, sugar, glass, one or more polymers, lipids, crystal structures, tetrahedrons, and combinations thereof.

5. The assembly of claim 3, wherein the energy-activated locking mechanism comprises a polymer selected from the group consisting of poly-L-lactic acid (PLLA), polyglycolic acid (PGA), polyvinyl alcohol (PVA) and combinations thereof.

6. The assembly of claim 1, wherein the element having first and second positions comprises a spring.

7. The assembly of claim 6, wherein the spring is selected from the group consisting of a compression spring, an extension spring and a twisted spring.

8. The assembly of claim 1, wherein the element having first and second positions comprises a pressurized fluid.

9. The assembly of claim 1, wherein the element having first and second positions comprises a vacuum.

10. The assembly of claim 1, further comprises means for applying energy to activate the locking mechanism.

11. The assembly of claim 10, wherein the means for applying energy comprises a conductor of energy selected from the group consisting of electromagnetic radiation, thermal energy, electrical energy, vibrational energy, and combinations thereof.

12. The assembly of claim 11, wherein the energy is electromagnetic radiation and the electromagnetic radiation is selected from the group consisting of radio waves, microwaves, terahertz radiation, infrared radiation, visible light, ultraviolet radiation, X-rays, gamma rays and combinations thereof.

13. The assembly of claim 11, wherein the energy is thermal energy.

14. The assembly of claim 11, wherein the energy is vibrational energy.

15. The assembly of claim 1, wherein the implantable device comprises a vaso-occlusive device.

16. The assembly of claim 15, wherein the vaso-occlusive device is a coil or a tubular braid.

17. The assembly of claim 1, wherein the delivery device comprises a catheter.

18. The assembly of claim 17, wherein the delivery device comprises a hypotube.

19. A method of occluding a body cavity comprising introducing an implantable assembly according to claim 1 into the body cavity.

20. The method of claim 19, wherein the body cavity is an aneurysm.