SYSTEM AND METHOD FOR RETAINING VASO-OCCLUSIVE DEVICES WITHIN AN ANEURYSM

• US 20070106311A1
• Filed: 12/28/2006
• Published: 05/10/2007
• Est. Priority Date: 04/12/2002
• Status: Abandoned Application

• Current Assignee: Stryker European Operations Holdings, LLC (Stryker Corporation)
• Original Assignee: Boston Scirntific Place
• Inventors: Eder, Joseph, Wallace, Michael, Gerberding, Brent
• Application Number:
  US11/617,293
• Publication Number:
  US 20070106311A1
• Time in Patent Office: Days
• US Class Current: 606/151
• 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 17/12172 having a pre-set deployed three-dimensional shape methods of manufacturing A61B2017/00526
• CPC Class Codes: A61B 2017/12063 electrolytically detachable
• CPC Class Codes: A61F 2/06 Blood vessels

Abstract

The present invention is directed to systems for occluding an aneurysm having an aneurysmal neck and an aneurysmal inner wall. Generally, a device in accordance with the present invention includes a mesh-like structure that is integrally composed of a shape-memory alloy such as NiTi. The device is deployed within the aneurysm through the aneurysmal neck. The device is configured to be in a deployed state and an undeployed state, and is configured to transition from the undeployed state to the deployed state by exposure to a higher temperature and/or by being unconstrained. The device may function to retain finer vaso-occlusive devices such as vaso-occlusive coils and/or embolic liquids. Furthermore, the device itself may function as a vaso-occlusive device.

Claims

1. A vaso-occlusive device for use in occluding an aneurysm having an aneurysmal neck and an aneurysmal inner wall, comprising:

a mesh-like structure comprising a proximal end and a distal end, the distal end configured to be inserted through the aneurysmal neck when in an undeployed state, and configured to flare open and expand against at least a portion of the aneurysmal inner wall when in a deployed state, the proximal end configured to flare open and expand against one of

a portion of the aneurysmal inner wall, and

a portion of a vessel wall adjacent to the aneurysmal neck,

when in a deployed state,

wherein the mesh-like structure further comprises a tubular element extending between the proximal and distal ends.

2. The vaso-occlusive device of claim 1, wherein the proximal end is configured to be inserted through the aneurysmal neck when in an undeployed state, and to flare open and expand against at least a portion of the aneurysmal inner wall when in a deployed state, and wherein the tubular element is sized to fit within the aneurysm when in a deployed state.

3. The vaso-occlusive device of claim 1, wherein the proximal end is configured to flare open and expand against at least a portion of the vessel wall adjacent to the aneurysmal neck when in a deployed state, and wherein the tubular element is sized to fit through the aneurismal neck when in a deployed state.

4. The vaso-occlusive device of claim 1, wherein at least one of the proximal end and distal end is configured to expand by heat activation into the deployed state.

5. The vaso-occlusive device of claim 1, wherein at least one of the proximal end and distal end is configured to expand into the deployed state upon release of a compressive force.

6. The vaso-occlusive device of claim 1, wherein the mesh-like structure is formed from a plurality of braided fine wires.

7. The vaso-occlusive device of claim 1, wherein the mesh-like structure is composed of a NiTi alloy.

8. The vaso-occlusive device of claim 6, wherein the fine wires have varying diameters.

9. The vaso-occlusive device of claim 6, wherein one or more of the fine wires are radiopaque.

10. The vaso-occlusive device of claim 1, wherein the mesh-like structure is coated with radiopaque material.

11. The vaso-occlusive device of claim 1, further comprising radiopaque markers coupled to the mesh-like structure.

12. A catheter assembly for occluding an aneurysm having an aneurysmal neck and an aneurysmal inner wall, comprising:

a delivery catheter having a distal end; and

a mesh-like structure detachably coupled to the distal end of the catheter, the mesh-like structure comprising a proximal end and a distal end, the distal end configured to be inserted through the aneurysmal neck when in an undeployed state, and configured to flare open and expand against at least a portion of the aneurysmal inner wall when in a deployed state, the proximal end configured to flare open and expand against one of

a portion of the aneurysmal inner wall, and

a portion of a vessel wall adjacent to the aneurysmal neck,

when in a deployed state,

wherein the mesh-like structure further comprises a tubular element extending between the proximal and distal ends.

13. The catheter assembly of claim 12, wherein the proximal end is configured to be inserted through the aneurysmal neck when in an undeployed state, and to flare open and expand against at least a portion of the aneurysmal inner wall when in a deployed state, and wherein the tubular element is sized to fit within the aneurysm when in a deployed state.

14. The catheter assembly of claim 12, wherein the proximal end is configured to flare open and expand against at least a portion of the vessel wall adjacent to the aneurysmal neck when in a deployed state, and wherein the tubular element is sized to fit through the aneurismal neck when in a deployed state

15. The catheter assembly of claim 12, wherein the at least one of the proximal end and distal end is configured to expand by heat activation into the deployed state.

16. The catheter assembly of claim 12, wherein the at least one of the proximal end and distal end is configured to expand into the deployed state upon releasing a compressive force.

17. The catheter assembly of claim 12, wherein the mesh-like structure is formed from a plurality of braided fine wires.

18. The catheter assembly of claim 12, wherein the mesh-like structure is composed of a NiTi alloy.

19. The catheter assembly of claim 17, wherein the fine wires have varying diameters.

20. The catheter assembly of claim 17, wherein the fine wires are radiopaque.

21. The catheter assembly of claim 12, wherein the mesh-like structure is coated with radiopaque material.

22. The catheter assembly of claim 12, further comprising radiopaque markers coupled to the mesh-like structure.

23. The catheter assembly in claim 12, wherein the mesh-like structure is capable of being delivered to the aneurysm using a method selected from a group consisting of an electrolytically severable method, a retractable sheath method, and a push method.

24. A vaso-occlusive device for use in occluding an aneurysm having an aneurysmal neck and an aneurysmal inner wall, the aneurysm residing in a vessel having a vessel inner wall, the device comprising:

a mesh-like structure comprising a retainer and an anchor, the retainer configured to be inserted through the aneurysmal neck when in an undeployed state, and configured to expand against a portion of the aneurysmal inner wall surrounding the aneurysmal neck when in a deployed state, wherein a portion of the aneurysmal inner wall is not covered by the mesh-like structure, the anchor configured to expand against a portion of the vessel inner wall adjacent the aneurysmal neck when in a deployed state

wherein the anchor is shaped as a flattened disk.

25. The vaso-occlusive device of claim 24, wherein the mesh-like structure further comprises a central tubular element, and the retainer and anchor are formed at opposing ends of the central tubular element.

26. The vaso-occlusive device in claim 24, wherein the retainer is shaped as a flattened disk.

27. The vaso-occlusive device in claim 24, wherein the retainer is shaped as a flared open cup.

28. The vaso-occlusive device of claim 24, wherein the retainer and anchor are configured to expand by heat activation into the deployed state.

29. The vaso-occlusive device of claim 24, wherein the retainer and anchor are configured to expand into the deployed state when unconstrained.

30. The vaso-occlusive device of claim 24, wherein the mesh-like structure is formed from a plurality of braided fine wires.

31. The vaso-occlusive device of claim 24, wherein the mesh-like structure is composed of a NiTi alloy.

32. The vaso-occlusive device of claim 30, wherein the plurality of fine wires have varying diameters.

33. The vaso-occlusive device of claim 30, wherein the fine wires are radiopaque.

34. The vaso-occlusive device of claim 24, wherein the mesh-like structure is coated with radiopaque material.

35. The vaso-occlusive device of claim 24, further comprising radiopaque markers coupled to the mesh-like structure.

36. A catheter assembly for occluding an aneurysm having an aneurysmal neck and an aneurysmal inner wall, comprising:

a delivery catheter having a distal end; and

a mesh-like structure detachably coupled to the distal end of the catheter, the mesh-like structure comprising a retainer and an anchor, the retainer configured to be inserted through the aneurysmal neck when in an undeployed state, and configured to expand against a portion of the aneurysmal inner wall surrounding the aneurysmal neck when in a deployed state, wherein a portion of the aneurysmal inner wall is not covered by the mesh-like structure, the anchor configured to expand against a portion of the vessel inner wall adjacent the aneurysmal neck when in a deployed state

wherein the anchor is shaped as a flattened disk.

37. The vaso-occlusive device of claim 36, wherein the mesh-like structure further comprises a central tubular element, and the retainer and anchor are formed at opposing ends of the central tubular element.

38. The vaso-occlusive device in claim 36, wherein the retainer is shaped as a flattened disk.

39. The vaso-occlusive device in claim 36, wherein the retainer is shaped as a flared open cup.

40. The vaso-occlusive device of claim 36, wherein the retainer and anchor are configured to expand by heat activation into the deployed state.

41. The vaso-occlusive device of claim 36, wherein the retainer and anchor are configured to expand into the deployed state when unconstrained.

42. The vaso-occlusive device of claim 36, wherein the mesh-like structure is formed from a plurality of braided fine wires.

43. The vaso-occlusive device of claim 36, wherein the mesh-like structure is composed of a NiTi alloy.

44. The vaso-occlusive device of claim 42, wherein the plurality of fine wires have varying diameters.

45. The vaso-occlusive device of claim 42, wherein the fine wires are radiopaque.

46. The vaso-occlusive device of claim 36, wherein the mesh-like structure is coated with radiopaque material.

47. The vaso-occlusive device of claim 36, further comprising radiopaque markers coupled to the mesh-like structure.