Aneurysm neck obstruction device

• US 6,454,780 B1
• Filed: 06/21/2001
• Issued: 09/24/2002
• Est. Priority Date: 06/21/2001
• Status: Expired due to Term

• Current Assignee: Stryker European Operations Holdings, LLC (Stryker Corporation)
• Original Assignee: Scimed Life Systems Incorporated (Boston Scientific Corporation)
• Inventors: Wallace, Michael P.
• Primary Examiner(s): Izaguirre, Ismael
• Application Number:
  US09/886,567
• Time in Patent Office: 460 Days
• Field of Search: 606/1, 606/151, 606/153, 606/156, 606/158, 606/200, 606/213
• 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 2017/1205 Introduction devices
• CPC Class Codes: A61B 2017/12063 electrolytically detachable
• CPC Class Codes: A61B 2017/12068 detachable by heat

Abstract

An implantable medical device for at least partially closing a neck portion of a vascular aneurysm is disclosed. The treatment device includes a collapsible neck bridge having a delivery configuration and a deployed configuration. The treatment device also includes an actuation mechanism operably attached to the collapsible neck bridge and configured to covert the collapsible neck bridge between the delivery configuration, wherein the actuation mechanism has an elongated form, and the deployed configuration, wherein the actuation mechanism has a constricted form.

Claims

1. An aneurysm treatment device for at least partially closing a neck portion of a vascular aneurysm, comprising:

a collapsible neck bridge having a delivery configuration and a deployed configuration;

an actuation mechanism operably attached to the collapsible neck bridge and configured to convert the collapsible neck bridge between the delivery configuration, wherein the actuation mechanism has an elongated form, and the deployed configuration, wherein the actuation mechanism has a constricted form.

2. The device of claim 1, wherein the actuation mechanism is located inside the collapsible neck bridge.

3. The device of claim 1, wherein the collapsible neck bridge comprises a fabric-like material.

4. The device of claim 3, wherein a radio-opaque material is incorporated into the fabric-like material.

5. The device of claim 2, wherein the actuation mechanism defines a lumen through the collapsible neck bridge.

6. The device of claim 2, wherein the actuation mechanism is connected to the collapsible neck bridge in a first location proximate a proximal aperture formed in the collapsible neck bridge, and in a second location proximate a distal aperture formed in the collapsible neck bridge.

7. The device of claim 6, wherein:

the proximal and distal apertures are spaced apart a first distance when the collapsible neck bridge is in the delivery configuration; and

the proximal and distal apertures are spaced apart a second distance that is less than the first distance, when the collapsible neck bridge is in the deployed configuration.

8. The device of claim 1, wherein the collapsible neck bridge in the deployed configuration takes the form of a double-layered occlusion member.

9. The device of claim 8, wherein the double-layered occlusion member is approximately disc-shaped and of a size and overall flexibility to lodge at the neck portion of the vascular aneurysm.

10. The device of claim 1, wherein the collapsible neck bridge in the delivery configuration is of a size and overall flexibility to be deliverable through a tubular delivery device.

11. The device of claim 1, further comprising an elongated delivery member having a distal end detachably connected to the actuation mechanism.

12. The device of claim 11, wherein the elongated delivery member is electrolytically detachable from the actuation mechanism.

13. The device of claim 1, wherein when the collapsible neck bridge is in the deployed configuration and the actuation mechanism takes the constricted form, the actuation mechanism forms a conduit through which a treatment agent can be delivered into the vascular aneurysm.

14. The device of claim 13, further comprising an elongated delivery member detachably connected to the actuation mechanism and wherein:

the elongated delivery member includes a hollow interior that communicates with the conduit to enable the treatment agent to be delivered through the elongated delivery member, through the conduit and into the vascular aneurysm.

15. The device of claim 14, further comprising a heath attached to the distal end of the elongated delivery member to encourage an effective transfer of the treatment agent from the elongated delivery member to the conduit.

16. The device of claim 1, wherein the collapsible neck bridge is permeable to blood flow.

17. The device of claim 1, wherein the actuation mechanism is a resilient member operably disposed to bias the collapsible neck bridge toward the deployed configuration.

18. The device of claim 17, wherein the resilient member is a metallic spring.

19. The device of claim 17, further comprising an elongate member operably disposed relative the actuation mechanism and configured to temporarily maintain the actuation mechanism in the elongated form, thereby temporarily maintaining the collapsible neck bridge in the delivery configuration.

20. The device of claim 17, wherein the resilient member is located inside the collapsible neck bridge and defines a lumen there through, the lumen being between a distal aperture and a proximal aperture formed in the collapsible neck bridge, the resilient member having a first end connected proximate to the distal aperture and a second end connected proximate to the proximal aperture.

21. The device of claim 20, further comprising:

a first elongate member that extends through the lumen and through the distal and proximal apertures, the first elongate member thereby extending through the resilient member and through the collapsible neck bridge;

a second elongate member having a ball valve connected to a distal end thereof, the second elongate member and ball valve coaxially and slidably engaging the first elongate member.

22. The device of claim 21, wherein:

the lumen and the proximal aperture are sized to allow the second elongate member and the ball valve to slide there through; and

the distal aperture is sized to prevent the ball valve from passing there through.

23. The device of claim 22, wherein the resilient member is arranged such that it can be converted between the elongated and constricted forms by varying an amount of pressure applied by the ball valve against an area of the collapsible neck bridge that is proximate the distal aperture.

24. The device of claim 1, wherein the actuation mechanism is constructed of a material having shape memory characteristics.

25. The device of claim 24, wherein the material causes the actuation mechanism to take one of the elongated and constricted forms depending on a temperature of an environment that surrounds the actuation mechanism.

26. The device of claim 25, wherein the actuation mechanism has an elongated-accordion shape when in the elongated form and a constricted-accordion shape when in the constricted form.

27. The device of claim 26, wherein the actuation mechanism is located inside the collapsible neck bridge and defines a lumen there through.

28. The device of claim 27, wherein the actuation mechanism is connected to the collapsible neck bridge in a first location proximate a proximal aperture formed in the collapsible neck bridge, and in a second location proximate a distal aperture formed in the collapsible neck bridge.

29. The device of claim 28, wherein:

the proximal and distal apertures are spaced apart a first distance when the collapsible neck bridge is in the delivery configuration; and

the proximal and distal apertures are spaced apart a second distance that is less than the first distance, when the collapsible neck bridge is in the deployed configuration.

30. The device of claim 26, wherein the collapsible neck bridge in the deployed configuration takes the form of a double-layered occlusion member.

31. The device of claim 26, wherein when the collapsible neck bridge is in the deployed configuration and the actuation mechanism takes the constricted form, the actuation mechanism forms a conduit through which a treatment agent can be delivered into the vascular aneurysm.

32. The device of claim 31, further comprising an elongated delivery member detachably connected to the actuation mechanism and wherein:

the elongated delivery member includes a hollow interior that communicates with the conduit to enable the treatment agent to be delivered through the elongated delivery member, through the conduit and into the vascular aneurysm.

33. The device of claim 25, wherein the actuation mechanism is a plurality of struts that are substantially unbent in the elongated form and bend in the constricted form.

34. The device of claim 33, wherein the actuation mechanism is located inside the collapsible neck bridge and defines a lumen there through.

35. The device of claim 34, wherein the actuation mechanism is connected to the collapsible neck bridge in a first location proximate a proximal aperture formed in the collapsible neck bridge, and in a second location proximate a distal aperture formed in the collapsible neck bridge.

36. The device of claim 35, wherein:

the proximal and distal apertures are spaced apart a first distance when the collapsible neck bridge is in the delivery configuration; and

the proximal and distal apertures are spaced apart a second distance that is less than the first distance, when the collapsible neck bridge is in the deployed configuration.

37. The device of claim 33, wherein the collapsible neck bridge in the deployed configuration takes the form of a double-layered occlusion member.

38. The device of claim 33, wherein when the collapsible neck bridge is in the deployed configuration and the actuation mechanism takes the constricted form, the actuation mechanism forms a conduit through which a treatment agent can be delivered into the vascular aneurysm.

39. The device of claim 38, further comprising an elongated delivery member detachably connected to the actuation mechanism and wherein:

the elongated delivery member includes a hollow interior that communicates with the conduit to enable the treatment agent to be delivered through the elongated delivery member, through the conduit and into the vascular aneurysm.

40. A method of treating an aneurysm in a parent vessel having a lumen, the aneurysm having a neck and inner wall defining a cavity that is in communication with the lumen, the method comprising:

providing a collapsible neck bridge that incorporates an actuation mechanism and is detachably connected to a distal end of an elongated delivery member;

endovascularly moving the collapsible neck bridge in a delivery configuration, wherein the actuation mechanism has an elongated form, to a site proximate the aneurysm; and

actuating the actuation mechanism so as to covert the collapsible neck bridge from the delivery configuration to a deployed configuration wherein the actuation mechanism has a constricted form.

41. The method of claim 40, wherein following actuating, the method further comprises:

delivering a treatment agent through a hollow interior of the elongated delivery member, and through a conduit formed in the collapsible neck bridge, to a location within the aneurysm; and

detaching the elongated delivery member from the collapsible neck bridge.

42. The method of claim 40, wherein the step of actuating the actuation mechanism so as to covert the collapsible neck bridge from the delivery configuration to a deployed configuration wherein the actuation mechanism has a constricted form comprises:

actuating the actuation mechanism so as to covert the collapsible neck bridge from the delivery configuration to a deployed configuration wherein the actuation mechanism has a constricted form and the collapsible neck bridge takes the form of a double-layered occlusion member.

43. A system for treating an aneurysm in a vessel, the aneurysm having an inner wall and a neck defining a cavity, the system comprising:

an elongated delivery member;

a treatment device disconnectably attached to the elongated delivery member; and

wherein

the treatment device comprises a collapsible neck bridge that incorporates a constrictable actuation mechanism that has an elongated form and a constricted form, the collapsible neck bridge being in a delivery configuration when the actuation mechanism is in the elongated form, and in a deployed configuration when the actuation mechanism is in the constricted form.

44. The system of claim 43, further comprising:

an elongate member operably disposed relative the constrictable actuation mechanism and configured to temporarily maintain the actuation mechanism in the elongated form, thereby temporarily maintaining the collapsible neck bridge in the delivery configuration.

45. The system of claim 43, wherein the constrictable actuation mechanism is constructed of a material having temperature-sensitive shape memory characteristics, and wherein the actuation mechanism is configured to, in response to a change in temperature, convert from the elongated form to the constricted form, thereby converting the collapsible neck bridge from the delivery configuration to the deployed configuration.