Nitinol occlusion plug

Patent metadata

Field	Value
Publication number	US-2016143646-A1
Application number	US-201514951272-A
Country	US
Kind code	A1
Filing date	Nov 24, 2015
Priority date	Nov 24, 2014
Publication date	May 26, 2016
Grant date	—

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 material, the elongate member being configured to assume a spiraling shape defining an ovoid space when deposited within a body lumen.

2 . The occlusive plug of claim 1 , further comprising a plurality of polymer fibers, each of the plurality of polymer fibers being attached to the elongate member.

3 . The occlusive plug of claim 2 , further comprising at least one polymer sleeve disposed circumferentially about a portion of a length of the elongate member and securing at least one of the plurality of polymer fibers to the elongate member.

4 . The occlusive plug of claim 3 , wherein the polymer sleeve includes a radiopaque material.

5 . The occlusive plug of claim 1 , wherein the elongate member is a nitinol wire.

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

7 . A system for occluding a vascular structure, 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 material, 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 a body lumen.

8 . The system of claim 7 , wherein an interior diameter of the catheter is not more than two times an outer diameter of the elongate member.

9 . The system of claim 7 , wherein the elongate member is a nitinol wire.

10 . The system of claim 7 , wherein the occlusive plug includes a plurality of polymer fibers connected to the elongate member.

11 . The system of claim 9 , wherein, each fiber has at least one end that is not connected to the elongate member.

12 . The system of claim 9 , further comprising at least one polymer sleeve disposed circumferentially about a portion of a length of the elongate member and securing at least one of the plurality of polymer fibers to the elongate member.

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

14 . A method of treating a patient, comprising:
inserting, into a vascular structure of a patient, a distal end of a catheter; and placing, within or adjacent to the vascular structure, an occlusive plug, the plug comprising a single elongate member configured to assume a spiraling shape defining an ovoid space when deposited within a body lumen.

15 . The method of claim 14 , wherein the elongate member is a single nitinol wire and the step of placing the occlusive plug within or adjacent to the vascular structure comprises advancing the elongate member through a lumen of the catheter, wherein the elongate member is in a substantially linear elongated configuration when advanced through the catheter lumen.

16 . The method of claim 15 , wherein the occlusive plug includes a plurality of polymer fibers connected to the elongate member.

17 . The system of claim 16 , wherein each fiber has at least one end that is not connected to the elongate member.

18 . The method of claim 16 , wherein the occlusive plug includes at least one polymer sleeve disposed circumferentially about a portion of a length of the elongate member and securing at least one of the plurality of polymer fibers to the elongate member.

19 . The method of claim 18 , wherein the polymer sleeve includes a radiopaque material.

20 . The method of claim 14 , wherein the elongate member includes a radiopaque marker band.

Assignees

• Boston Scient Scimed Inc

Inventors

• Ryan Frank
• O'Sullivan Connor
• O'Brien John Allan

Classifications

• A61B17/12031

  complete occlusion · CPC title

• A61B2017/00867

  shape memory effect · CPC title

• A61B17/12113

  within an aneurysm · CPC title

• A61B17/12145 Primary

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

• A61B17/1215

  comprising additional materials, e.g. thrombogenic, having filaments, having fibers, being coated · CPC title