THREE-DIMENSIONAL COMPLEX COIL

• US 20170072452A1
• Filed: 11/23/2016
• Published: 03/16/2017
• Est. Priority Date: 11/17/2005
• Status: Active Grant

• Current Assignee: Microvention Incorporated (Terumo Corporation)
• Original Assignee: Microvention Incorporated (Terumo Corporation)
• Inventors: Monetti, Richard, Martinez, George, Fitz, Matthew, Perez, Damian Jonathan
• Granted Patent: US 10,081,048 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• 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 17/1214 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 17/1215 comprising additional materials, e.g. thrombogenic, having filaments, having fibers, being coated
• CPC Class Codes: A61B 17/12154 having stretch limiting means
• CPC Class Codes: A61B 17/1219 expandable in contact with liquids
• CPC Class Codes: A61B 2017/00526 Methods of manufacturing
• CPC Class Codes: A61B 2017/00867 shape memory effect
• CPC Class Codes: B21F 45/00 Wire-working in the manufacture of other particular articles of pins, needles, nails, hairpins B21G; of chains B21L ; for semiconductor devices H01L24/42
• CPC Class Codes: B21F 45/008 of medical instruments, e.g. stents, corneal rings medical science A61

Abstract

A complex coil and a fixture for forming same configured such that loops are formed having various configurations relative to each other. The configurations provide improved thrombus formation and reduced rotation or tumbling once implanted. The complex coil is formed of a material that may deformed for purposes of placing the complex coil into a catheter and returns to a complex shape that includes said loops once deployed.

Claims

1. A method of making a complex coil comprising:

providing a wire;

forming a first loop and a second loop adjoined to each other to form in a first FIG. 8 pattern;

forming a third loop and a fourth loop adjoined to each other to form in a second FIG. 8 pattern;

configuring said first FIG. 8 pattern and said second FIG. 8 pattern to face each other in a spaced-apart parallel orientation.

2. The method of claim 1, wherein said forming said first and said second loop further comprises winding said wire around a first pin and a second pin of a fixture, respectively;

said first pin and said second pin extending in a direction of an x-axis.

3. The method of claim 2, wherein said forming said third loop and said fourth loop comprises winding said wire around a third pin and a fourth pin, respectively, said third pin and said fourth pin extending in a direction of a y-axis.

4. The method of claim 1, further comprising forming a fifth loop and a sixth loop, configured such that a longitudinal axis of each fifth and sixth loop is angled at about 90 degrees relative to longitudinal axes of said first loop and said second loop.

5. The method of claim 4, wherein said forming said fifth loop and said sixth look further comprises winding said wire around a fifth pin and a sixth pin, respectively.

6. The method of claim 1, further comprising forming at least one loop perpendicularly connecting said first FIG. 8 pattern and said second FIG. 8 pattern.

7. The method of claim 1, further comprising forming a fifth loop and a sixth loop configured to perpendicularly connect said first FIG. 8 pattern and said second FIG. 8 pattern.

8. The method of claim 7, wherein said fifth loop and said sixth loops are configured to be parallel to each other.

9. The method of claim 7, wherein said fifth loop and said sixth loops are configured to be located within the same plane.

10. The method of claim 1, wherein forming said first loop and said second loop in said first FIG. 8 pattern comprises forming at least one open loop.

11. The method of claim 1, wherein forming said third loop and said fourth loop in said second FIG. 8 pattern comprises forming at least one open loop.

12. The method of claim 1, wherein said first loop is configured to be aligned with said third loop and said second loop is configured to be aligned with said fourth loop.

13. The method of claim 1, wherein said first FIG. 8 pattern is configured to be parallel to said second FIG. 8 pattern, and wherein said first FIG. 8 pattern is configured to be rotationally perpendicular to said second FIG. 8 pattern.

14. A method of forming a complex coil for the treatment of aneurysms, comprising:

wrapping a coiled wire around a toroid-shaped fixture;

heat setting said coiled wire;

removing the coiled wire from the fixture.

15. The method of claim 14, wherein wrapping said coiled wire around said toroid-shaped fixture comprises passing the coiled wire through a center of the fixture and around an outside of the fixture a plurality of times, thereby forming a plurality of loops.

16. The method of claim 15, wherein forming said plurality of loops comprises forming four loops around said fixture, each loop spaced approximately 90 degrees from adjacent loops.

17. The method of claim 15, further comprising assessing a size of an aneurysm in which said complex coil is to be placed and determining a number of loops to be formed based said aneurysm size.

18. The method of claim 14, wherein heat setting said coiled wire comprises heating said coiled wire to about 1100°

F. for a predetermined period of time.

19. The method of claim 18, wherein heating said coiled wire to 1100°

F. for said predetermined period of time comprises heating said coiled wire to 1100°

F. for 5 to 60 minutes.