Vasoocclusive device for treatment of aneurysms

• US 6,616,617 B1
• Filed: 02/08/2001
• Issued: 09/09/2003
• Est. Priority Date: 12/05/1997
• Status: Expired due to Fees

• Current Assignee: Micrus Corporation (Johnson & Johnson)
• Original Assignee: Micrus Corporation (Johnson & Johnson)
• Inventors: Lei, Lok A., Larsen, Julia A., Ferrera, David A., Kurz, Daniel R.
• Primary Examiner(s): Hindenburg, Max F.
• Assistant Examiner(s): MARMOR II, CHARLES ALAN
• Application Number:
  US09/762,539
• Time in Patent Office: 943 Days
• Field of Search: 600/434, 600/435, 600/585, 606/108, 606/191, 606/213, 606/194, 606/195, 606/198, 606/200, 604/52, 604/57, 604/104, 623/1.1, 623/1.2, 623/1.42, 623/1.18
• US Class Current: 600/585
• 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 17/12154 having stretch limiting means
• CPC Class Codes: A61B 17/12163 having a string of elements connected to each other
• CPC Class Codes: A61B 17/12172 having a pre-set deployed three-dimensional shape methods of manufacturing A61B2017/00526
• 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: A61B 2017/00884 enhancing wound closure
• CPC Class Codes: A61B 2017/00893 pharmaceutically effective
• CPC Class Codes: A61B 2017/1205 Introduction devices
• CPC Class Codes: A61B 2017/12072 the heat created by laser light
• CPC Class Codes: A61B 90/39 Markers, e.g. radio-opaque or breast lesions markers
• CPC Class Codes: A61M 2025/09191 made of twisted wires

Abstract

The three dimensional device is adapted to be inserted into a portion of a vasculature for occluding the portion of the vasculature for use in interventional therapy and vascular surgery. The device is formed from a multi-stranded microcable having a plurality of flexible strands of a shape memory material and at least one radiopaque strand. The device can be bundled by an outer cover to constrain the strands of the micro-cable about a longitudinal axis to produce a composite banded cable. The radiopaque strand can have a core strand with a plurality of intermittently spaced apart enlarged radiopaque portions that may be a plurality of beads of radiopaque material spaced apart and mounted on the core strand, or a plurality of coils intermittently wound about and spaced apart on the core strand.

Claims

1. A device for use in interventional therapy and vascular surgery, adapted to be inserted into a portion of a vasculature, comprising:

a shape memory coil having an outer coil portion and an inner core portion, and said shape memory coil having a collapsed primary coil configuration and an expanded secondary configuration with a three dimensional shape; and

a radiopaque strand extending through the core of the shape memory coil to provide a radiopaque marker of the deployed configuration of the device, said radiopaque strand having a plurality of intermittently spaced apart enlarged portions disposed within said shape memory coil.

2. The device of claim 1, wherein said shape memory coil comprises a multi-stranded coil having a plurality of flexible strands of a resilient material.

3. The device of claim 1, wherein said shape memory coil comprises a single stranded coil.

4. The device of claim 3, wherein said single stranded coil comprises a nickel titanium alloy.

5. The device of claim 3, herein said single stranded coil comprises a shape memory polymer.

6. The device of claim 1, wherein said enlarged portions comprise a radiopaque material selected from the group consisting of platinum and gold.

7. The device of claim 1, wherein said enlarged portions comprise a plurality of beads of radiopaque material spaced apart and mounted on a core strand of material.

8. The device of claim 7, wherein said beads comprise a radiopaque material selected from the group consisting of platinum, gold and tungsten.

9. The device of claim 7, wherein at least one of said plurality of beads is bonded to a segment of the shape memory coil.

10. The device of claim 7, wherein an end bead is bonded to a segment of the shape memory coil.

11. The device of claim 1, wherein said enlarged portions comprise a plurality of coils intermittently wound about and spaced apart on said core strand.

12. The device of claim 11, wherein said core strand comprises a radiopaque material selected from the group consisting of platinum and gold.

13. The device of claim 11, wherein said spaced apart coils comprise a radiopaque material selected from the group consisting of platinum and gold.

14. The device of claim 1, wherein said core strand comprises a material selected from the group consisting of platinum, gold, a shape memory polymer having a glass transition temperature (T_g) below 25°

C., a hydrogel, an amorphous gel, and a fiber.