Embolic coils

• US 8,152,839 B2
• Filed: 05/09/2006
• Issued: 04/10/2012
• Est. Priority Date: 12/19/2005
• Status: Active Grant

• Current Assignee: Boston Scientific Scimed, Inc. (Boston Scientific Corporation)
• Original Assignee: Boston Scientific Scimed, Inc. (Boston Scientific Corporation)
• Inventors: Buiser, Marcia S., Seehusen, Ashley, Nardone, Christopher
• Primary Examiner(s): Foley, Shanon A
• Application Number:
  US11/430,602
• Publication Number:
  US 20070142893A1
• Time in Patent Office: 2,163 Days
• Field of Search: None
• US Class Current: 623/1.11
• 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 17/12145 having a pre-set deployed three-dimensional shape methods of manufacturing A61B2017/00526
• CPC Class Codes: A61B 17/1215 comprising additional materials, e.g. thrombogenic, having filaments, having fibers, being coated
• CPC Class Codes: A61B 2017/00004 (bio)absorbable, (bio)resorbable or resorptive
• CPC Class Codes: A61B 2017/00526 Methods of manufacturing
• CPC Class Codes: A61B 2017/00867 shape memory effect
• CPC Class Codes: A61B 2017/00893 pharmaceutically effective
• CPC Class Codes: A61B 90/39 Markers, e.g. radio-opaque or breast lesions markers

Abstract

Coils, such as embolic coils, and related methods, devices, and compositions, are disclosed.

Claims

1. An embolic coil formed of a wound ribbon having a primary shape and a secondary shape, wherein:

the primary shape is a straight shape;

the secondary shape is selected from the group consisting of a spiral shape, a single apex vortex shape, a J shape, a helical shape, a complex helical shape and a straight shape;

the wound ribbon is configured to exhibit its primary shape when disposed in a lumen of a medical device;

the wound ribbon is configured to exhibit its secondary shape upon exit from the medical device;

in its primary shape, the wound ribbon comprises consecutive windings of the ribbon that contact each other and are flush with each other; and

the ribbon is a strip of material having a polygonal transverse cross-section.

2. The embolic coil of claim 1, wherein the wound ribbon includes a first end that is not attached to a medical device or a medical device component, and a second end that is not attached to a medical device or a medical device component.

3. The embolic coil of claim 1, wherein the wound ribbon includes more than two windings.

4. The embolic coil of claim 1, wherein the strip of material has a rectangular transverse cross-section having a width and a length, and the length is greater than the width.

5. The embolic coil of claim 4, wherein the length of the rectangular transverse cross-section is at least 0.001 inch.

6. The embolic coil of claim 5, wherein the length of the rectangular transverse cross-section is at most 0.005 inch.

7. The embolic coil of claim 4, wherein the width of the rectangular transverse cross-section is at least 0.0005 inch.

8. The embolic coil of claim 7, wherein the width of the rectangular transverse cross-section is at most 0.005 inch.

9. The embolic coil of claim 1, wherein a ratio of the length of the rectangular cross-section to the width of the rectangular cross-section is at most about 75:

1.

10. The embolic coil of claim 1, further comprising at least one fiber.

11. The embolic coil of claim 10, wherein the consecutive windings include a first winding and a second winding, and the at least one fiber is disposed between the first and second windings.

12. The embolic coil of claim 11, wherein the first and second windings are consecutive windings.

13. The embolic coil of claim 12, wherein the at least one fiber is snapped in between adjacent windings of the wound ribbon.

14. The embolic coil of claim 10, wherein the at least one fiber is snapped in between adjacent windings of the wound ribbon.

15. The embolic coil of claim 1, wherein the strip of material comprises a metal.

16. The embolic coil of claim 1, wherein the strip of material comprises a radiopaque material.

17. The embolic coil of claim 1, wherein the strip of material has a square transverse cross-section.

18. The embolic coil of claim 1, further comprising:

a first bunch of fibers; and

a second bunch of fibers,

wherein a distance between the first bunch of fibers and the second bunch of fibers is at least two millimeters.

19. The embolic coil of claim 1, wherein a stiffness of the wound ribbon is at most about 0.01 pound-force.

20. The embolic coil of claim 19, wherein a stiffness of the wound ribbon is at least about 0.001 pound-force.