Three-dimensional complex coil

• US 9,533,344 B2
• Filed: 10/20/2011
• Issued: 01/03/2017
• 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
• Primary Examiner(s): Bryant, David
• Assistant Examiner(s): Averick, Lawrence
• Application Number:
  US13/278,008
• Publication Number:
  US 20120041464A1
• Time in Patent Office: 1,902 Days
• Field of Search: 721/37, 140/71.C, 296/05, 296/06, 267/165, 267/180, 267/182, 606/200, 606/96.01, 604/19, 623/1.1, 623/1.11, 623/1.12, 623/2.11, 623/2.18, 623/900, D11 1-184
• 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 for prostheses A61F2210/0014
• 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 complex coil for occluding an aneurysm in a patient, comprising;

a microcoil comprised of a single filament, said single filament annealed to form a toroidal shape in an unconstrained state, said single filament being movable into a linear state for placement in a linear tube of a delivery device;

said single filament configured for advancement linearly out of said delivery device and into said cerebral aneurysm, and a proximal end of said single filament being detachable from said delivery device;

wherein, in said unconstrained state, said single filament self-forms into its annealed toroidal shape wherein a plurality of loops are each substantially contained within one of a plurality of planes that intersect each other at a common intersection axis near a center of said complex coil;

said plurality of loops arranged in a generally circular pattern about said common intersection axis so as to form said toroidal shape.

2. The complex coil of claim 1, wherein each of said plurality of loops is positioned at about 90 degrees from adjacent loops.

3. The complex coil of claim 1, wherein said plurality of loops further comprises several groups of two adjacent loops.

4. The complex coil of claim 1, wherein said toroidal shape is a closed shape.

5. The complex coil of claim 1, wherein said toroidal shape is an open shape.

6. A complex coil for occluding aneurysm in a patient, comprising;

a microcoil comprised of a single filament, said single filament annealed to form a toroidal shape in an unconstrained state, said single filament being movable into a linear state for placement in a linear tube of a delivery device;

said single filament configured for advancement linearly out of said delivery device and into said cerebral aneurysm, and a proximal end of said single filament being detachable form said delivery device;

wherein said single filament has a substantially linear configuration within said vascular delivery device and, when in an unconstrained condition, self-forming into its annealed shape having a plurality of loops each contained within planes that intersect with each other at a common intersection axis and are further located in a circular arrangement around said common intersection axis.

7. The complex coil of claim 6, wherein each of said plurality of loops is substantially evenly spaced in a toroid shape.

8. The complex coil of claim 6, wherein said plurality of loops form an open toroid shape.