Nitinol occlusion plug

Patent metadata

Field	Value
Publication number	US-10722241-B2
Application number	US-201514951272-A
Country	US
Kind code	B2
Filing date	Nov 24, 2015
Priority date	Nov 24, 2014
Publication date	Jul 28, 2020
Grant date	Jul 28, 2020

Abstract

Occlusive plugs are provided which comprise a single elongate member that is insertable into and through a microcatheter and assumes a space-occupying shape when deployed into a vascular structure. The elongate member optionally includes one or more polymer fibers, one or more polymer sleeves to secure the polymer fibers to the elongate member, and/or a radiopaque marker band.

First claim

What is claimed is:

1. An occlusive plug, comprising:
a single elongate member comprising a shape-memory wire, the elongate member being configured to assume a spiraling shape defining an ovoid space when deposited within a body lumen;
a plurality of polymer fibers, each of the plurality of polymer fibers having a first end attached to the elongate member and a free second end opposite the first end; and
at least one polymer sleeve disposed about a circumference of the wire along a portion of a length of the elongate member and securing at least one of the plurality of polymer fibers to the elongate member.

2. The occlusive plug of claim 1 , wherein the polymer sleeve includes a radiopaque material.

3. The occlusive plug of claim 1 , wherein the wire is a nitinol wire.

4. The occlusive plug of claim 1 , further comprising at least one platinum band.

5. The occlusive plug of claim 1 , wherein the plurality of polymer fibers are attached to the elongate member at a single point.

6. The occlusive plug of claim 1 , wherein the at least one polymer sleeve is an extruded polymer tube.

7. The occlusive plug of claim 1 , wherein at least one of the plurality of polymer fibers is secured to the elongate member by a heat-shrunk polymer sleeve of the at least one polymer sleeve.

8. A system for occluding a body lumen, the system comprising:
a delivery catheter having proximal and distal ends and a lumen extending therebetween; and
an occlusive plug, comprising:
a single elongate member comprising a shape-memory wire, the elongate member being configured to assume a first, elongate shape when fully inserted into the lumen of the catheter and to assume a second spiraling shape defining an ovoid space when deployed within the body lumen;
a plurality of polymer fibers, each of the plurality of polymer fibers having a first end attached to the elongate member and a free second end opposite the first end; and
at least one polymer sleeve disposed about a circumference of the wire along a portion of a length of the elongate member and securing at least one of the plurality of polymer fibers to the elongate member.

9. The system of claim 8 , wherein an interior diameter of the catheter is not more than two times an outer diameter of the elongate member.

10. The system of claim 8 , wherein the wire is a nitinol wire.

11. The occlusive plug of claim 8 , wherein the polymer sleeve includes a radiopaque material.

12. The occlusive plug of claim 8 , wherein the plurality of polymer fibers are attached to the elongate member at a single point.

13. The occlusive plug of claim 8 , wherein the at least one polymer sleeve is an extruded polymer tube.

14. The occlusive plug of claim 8 , wherein at least one of the plurality of polymer fibers is secured to the elongate member by a heat-shrunk polymer sleeve of the at least one polymer sleeve.

15. An occlusive plug, comprising:
a single elongate member comprising a shape-memory wire, the elongate member defining an ovoid space with a longitudinal axis therethrough, and assuming a spiraling shape about the ovoid space along the longitudinal axis, when deployed within a body lumen;
a plurality of polymer fibers, each of the plurality of polymer fibers having a first end attached to the elongate member and a free second end opposite the first end; and
at least one polymer sleeve disposed about a circumference of the wire along a portion of a length of the elongate member and securing at least one of the plurality of polymer fibers to the elongate member.

16. The occlusive plug of claim 15 , wherein the polymer sleeve includes a radiopaque material.

17. The occlusive plug of claim 15 , wherein the wire is a nitinol wire.

18. The occlusive plug of claim 15 , further comprising at least one platinum band.

19. The occlusive plug of claim 15 , wherein the plurality of polymer fibers are attached to the elongate member at a single point.

20. The occlusive plug of claim 15 , wherein the at least one polymer sleeve is an extruded polymer tube.

Assignees

• Boston Scient Scimed Inc

Inventors

• Ryan Frank
• O'Sullivan Conor
• O'Brien John-Alan

Classifications

• A61B2017/00867

  shape memory effect · CPC title

• A61B17/12113

  within an aneurysm · CPC title

• A61B2017/1205

  Introduction devices · CPC title

• A61B17/12109

  in a blood vessel · CPC title

• A61B17/12145 Primary

  having a pre-set deployed three-dimensional shape (methods of manufacturing A61B2017/00526) · CPC title