Vasoocclusive coil with enhanced therapeutic strand structure

• US 7,422,569 B2
• Filed: 09/30/2003
• Issued: 09/09/2008
• Est. Priority Date: 07/23/2002
• Status: Expired due to Term

• Current Assignee: Depuy Synthes Products Incorporated (Johnson & Johnson)
• Original Assignee: Micrus Endovascular LLC (Johnson & Johnson)
• Inventors: Leopold, Eric W., Wilson, Peter, Dang, Diane Mai-Huong, Desai, Rupesh K.
• Primary Examiner(s): Bui; Vy Q.
• Application Number:
  US10/677,085
• Publication Number:
  US 20050043755A1
• Time in Patent Office: 1,806 Days
• Field of Search: 604/113, 604/114, 604/530, 604/531, 606/200
• US Class Current: 604/113
• 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 17/12099 characterised by the location of the occluder
• CPC Class Codes: A61B 17/12109 in a blood vessel
• CPC Class Codes: A61B 17/12113 within an aneurysm
• 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 17/12186 liquid materials adapted to be injected
• CPC Class Codes: A61B 17/1219 expandable in contact with liquids
• CPC Class Codes: A61B 17/32056 Surgical snare instruments for removing or smashing calculi A61B2017/2212; tonsillotomes A61B17/26
• CPC Class Codes: A61B 2017/00017 Electrical control of surgical instruments
• CPC Class Codes: A61B 2017/00867 shape memory effect for prostheses A61F2210/0014
• CPC Class Codes: A61B 2017/00955 thermoplastic
• CPC Class Codes: A61B 2017/12054 Details concerning the detachment of the occluding device from the introduction device
• CPC Class Codes: A61B 2017/12068 detachable by heat

Abstract

A vasoocclusive coil is reinforced with a stretch resistant member to improve safety during retraction of the coil. The stretch resistant member is fixedly attached at one end to the vasoocclusive coil, and the other end of the stretch resistant member is detachably mounted to an elongated pusher member to allow for placement and release of the vasoocclusive coil within the patient'"'"'s vasculature. The stretch resistant member may be formed from a therapeutic and/or bioactive non-metallic material to enhance the therapeutic properties of the vasoocclusive coil.

Claims

1. An apparatus for release and deployment of a stretch resistant therapeutic device within a patient'"'"'s vasculature, comprising:

a vasoocclusive coil having a proximal end and a distal end, said vasoocclusive coil defining a lumen between said proximal and distal ends;

an elongated pusher member having a distal end adjacent to said proximal end of said vasoocclusive coil;

at least one loop of fiber material attached to said elongated pusher member, said at least one loop of fiber material being severable by heating of said at least one loop of fiber material;

a loop attached to the proximal end of said coil and detachably mounted to said at least one loop of fiber material attached to the pusher member;

an electrical resistance heater wire disposed adjacent to said at least one loop of fiber material, said electrical resistance wire being connected to a control unit for heating and thereby severing said at least one loop of fiber material; and

a stretch resistant member extending through said lumen of said vasoocclusive coil, said stretch resistant member having first and second ends, said stretch resistant member being formed of a therapeutic non-metallic fiber material, and said stretch resistant member being doubled and said stretch resistant member being fixedly attached to said vasoocclusive coil only at said distal end of said vasoocclusive coil forming a loop and said loop being detachably mounted to the distal end of the elongated pusher member by said at least one loop of fiber material to allow for placement of the vasoocclusive coil within the patient'"'"'s vasculature.

2. The apparatus of claim 1, wherein said stretch resistant member is formed of a ribbon.

3. The apparatus of claim 1, wherein said stretch resistant member is formed of a braid.

4. The apparatus of claim 1, wherein said stretch resistant member is formed of a primary wind.

5. The apparatus of claim 1, wherein said stretch resistant member is formed of a stranded material.

6. The apparatus of claim 1, wherein said stretch resistant member is formed of a multi-filament material.

7. The apparatus of claim 1, wherein said stretch resistant member is formed of a twisted multi-filament material.

8. The apparatus of claim 1, wherein said therapeutic non-metallic fiber material is selected from the group consisting of silk, collagen, elastin, polyglycolic acid, polylactic acid, poly(D,L-lactic acid-co-glycolic acid), poly(L-lactide), poly(L-lactide-co-D,L-lactide), poly(L-lactide-co-glycolide), poly(glycolide-co-trimethylene carbonate), polyethylene oxide, polydioxanone, polycaprolactone, hylauric acid, polyhydroxylbutyrate, poly(phosphazene), poly(D,L-lactide-co-caprolactone), poly(glycolide-co-caprolactone), polyvinyl alcohol, polyanhydrides thereof, poly(ortho esters) thereof, poly(phoshate esters) thereof, poly(amino acids) thereof, poly(hydroxy butyrates) thereof, copolymers thereof, composites thereof, and combinations thereof.

9. The apparatus of claim 8, wherein said therapeutic non-metallic fiber material is a bioactive material.

10. The apparatus of claim 8, wherein said therapeutic non-metallic fiber material is bioabsorbable.

11. The apparatus of claim 8, wherein said therapeutic non-metallic fiber material is non-absorbable.

12. The apparatus of claim 8, wherein a therapeutic agent is absorbed by said therapeutic non-metallic fiber material.

13. The apparatus of claim 1, wherein said therapeutic non-metallic fiber material is formed from a polymer selected from the group consisting of an ethylene-octene copolymer, polypropylene, polyethylene, polyacrylate, polyacrylamide, poly(hydroxyethyl methacrylate), polyurethane, polysiloxane, and copolymers thereof.

14. The apparatus of claim 8 or 13, wherein the vasoocelusive coil is attached to the first and second ends of the stretch resistant member by heating of the first and second ends of the fiber.

15. The apparatus of claim 1, wherein said stretch resistant member is radiopaque.

16. The apparatus of claim 1, wherein said at least one loop of fiber material is formed from a thermoplastic material.

17. The apparatus of claim 1, wherein said at least one loop of fiber material is formed from polyethylene.