Atraumatic stent and method and apparatus for making the same

Patent metadata

Field	Value
Publication number	US-10278842-B2
Application number	US-201615204508-A
Country	US
Kind code	B2
Filing date	Jul 7, 2016
Priority date	Jan 26, 2009
Publication date	May 7, 2019
Grant date	May 7, 2019

Abstract

A stent includes a mesh wall including a plurality of filament crossings, the mesh wall defining at least a first stent section with a first diameter, a second stent section with a second diameter smaller than the first diameter, and a transition section where the mesh wall transitions from the second diameter to the first diameter. Each of the plurality of filament crossings has a braiding angle, and all braiding angles in each of the first stent section, the second stent section and the transition section are within 5 degrees of one another.

First claim

What is claimed is:

1. A stent comprising:
a mesh wall comprising a plurality of filament crossings, the mesh wall defining at least a first stent section with a first diameter, a second stent section with a second diameter smaller than the first diameter, and a transition section where the mesh wall transitions from the second diameter to the first diameter, wherein each of the plurality of filament crossings has a braiding angle, and all braiding angles in each of the first stent section, the second stent section and the transition section are within 5 degrees of one another.

2. The stent of claim 1 , wherein the braiding angles are 110°±3°.

3. The stent of claim 1 , wherein the braiding angles are 110°±1°.

4. The stent of claim 1 , wherein the mesh wall further comprises atraumatic ends.

5. The stent of claim 1 , wherein the first stent section extends to a first end of the stent and the second stent section includes a middle region of the stent.

6. The stent of claim 1 , wherein the filament crossings are formed by filaments, each filament comprising a core formed of a first metal and an outer layer formed of a second metal surrounding the core.

7. The stent of claim 6 , wherein the first metal is platinum and the second metal is nitinol.

8. The stent of claim 1 , further comprising a polymeric coating disposed on the mesh wall.

9. The stent of claim 1 , wherein the filament crossings define a mesh pattern that is a one-under and one-over pattern.

10. The stent of claim 1 , wherein the filament crossings define a mesh pattern that is a two-under and two-over pattern.

11. The stent of claim 1 , wherein each filament crossing is formed by only two filaments.

12. A stent comprising:
a braided tubular member including a plurality of filament crossings forming a tubular mesh pattern extending from a first stent end to a second stent end, the braided tubular member including a cylindrical section having a first diameter and a transition section increasing in diameter from the first diameter to a second diameter; and
wherein the mesh pattern is formed by braiding the plurality of filaments under constant force thereby achieving braiding angles between intersecting braided filaments that are within 5 degrees of one another throughout the cylindrical section and the transition section.

13. The stent of claim 12 , wherein every braiding angle is 110°±3°.

14. The stent of claim 12 , wherein every braiding angle is 110°±1°.

15. The stent of claim 12 , wherein the braided tubular member includes a third section, wherein the transition section is located between the cylindrical section and the third section, wherein all of the braiding angles in the cylindrical section, the transition section, and the third section are 110°±3°.

16. The stent of claim 12 , where the mesh pattern is non-interlocking.

17. The stent of claim 12 , wherein the first and second stent ends are atraumatic ends.

18. A braided stent comprising:
a plurality of filaments inter-braided to form a mesh tube, the filaments defining braiding angles at filament crossing locations;
the mesh tube having a first portion with a first diameter, a second portion with a second diameter which is different from the first diameter, and a transition portion positioned between the first portion and the second portion transitioning in diameter from the first diameter to the second diameter;
wherein the braiding angles at all filament crossing locations in the first portion, the second portion and the transition portion are 110°±3°.

19. The stent of claim 18 , wherein the plurality of filaments include a core formed of a first metal and an outer layer formed of a second metal surrounding the core.

20. The stent of claim 19 , wherein the first metal is platinum and the second metal is nitinol.

Assignees

• Boston Scient Scimed Inc

Inventors

• Lilburn Steve
• Norton Paul K
• Zupkofska Michael E
• Bedard Louis
• Harding Glenn

Classifications

• A61F2/82

  Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents (stent-grafts for tubular structures of the body other than blood vessels A61F2/04; stent-grafts for blood vessels A61F2/07) · CPC title

• A61F2002/91516

  the meander having a change in frequency along the band · CPC title

• A61F2/90 Primary

  characterised by a net-like or mesh-like structure · CPC title

• A61F2002/91525

  within the whole structure different bands showing different meander characteristics, e.g. frequency or amplitude · CPC title

• D10B2509/06

  Vascular grafts; stents · CPC title