Anti-migration stent with quill filaments

Patent metadata

Field	Value
Publication number	US-9814608-B2
Application number	US-201414227501-A
Country	US
Kind code	B2
Filing date	Mar 27, 2014
Priority date	Jul 14, 2011
Publication date	Nov 14, 2017
Grant date	Nov 14, 2017

Abstract

A stent that includes a plurality of quill filaments. Each quill filament includes filament material, a surface, and a plurality of quills. Each quill has a tip, a body, and a base where the body extends from the base to the tip. The quill filaments can be interwoven to form the stent or the quill filaments can be engaged to the framework of a stent.

First claim

The invention claimed is:

1. An interwoven stent comprising a middle stent region between two end stent regions and quills oriented towards a first stent end, wherein the middle stent region is quill free, each quill integral with a quill filament, the stent comprising a plurality of quill filaments,
wherein only the two end stent regions have quills, and
wherein each quill filament comprises a first zone, a second zone, and a third zone, the second zone connecting the first and third zones, each quill filament having quills only in the first and third zones.

2. The stent of claim 1 , the quill filaments having a same orientation when incorporated into the stent.

3. The stent of claim 1 , wherein quills in the first and third zones face a first filament end.

4. The stent of claim 1 , the stent further comprising quills oriented towards a second stent end, wherein the quills of the first zone face a first filament end, and the quills of the third zone face a second filament end.

5. The stent of claim 1 , the stent further comprising a cover, wherein the quills engage the cover.

6. A stent comprising interwoven quill filaments, each quill filament having quills, the quills including first quills oriented towards a first filament end, and second quills oriented towards a second filament end, the quills alternating between first quills and second quills, the stent having quills oriented towards each stent end,
wherein the interweaving of quill filaments defines successive intersections between quill filaments, and
wherein when a quill selected from the first quills or the second quills is present between successive intersections of quill filaments only one quill is present between successive intersections of quill filaments.

7. The stent of claim 6 , the stent comprising a middle stent region between two end stent regions, the two end stent regions having a larger diameter than the middle stent region.

8. The stent of claim 6 , the stent further comprising a cover, wherein the quills engage the cover.

9. The stent of claim 6 , the stent having no looped ends.

Assignees

• Boston Scient Scimed Inc

Inventors

• Clerc Claude O
• Weitzner Barry

Classifications

• A61F2250/0067

  Means for introducing or releasing pharmaceutical products into the body · CPC title

• A61F2/848 Primary

  having means for fixation to the vessel wall, e.g. barbs · CPC title

• A61F2250/0039

  differing in diameter · CPC title

• A61F2210/0014

  using shape memory or superelastic materials, e.g. nitinol · CPC title

• A61F2220/0016

  with sharp anchoring protrusions, e.g. barbs, pins, spikes · CPC title