Atraumatic stent and method and apparatus for making the same

Patent metadata

Field	Value
Publication number	US-12546038-B2
Application number	US-202519027956-A
Country	US
Kind code	B2
Filing date	Jan 17, 2025
Priority date	Jan 26, 2009
Publication date	Feb 10, 2026
Grant date	Feb 10, 2026

Abstract

A method of braiding a stent includes braiding a number of elongate filaments around a mandrel using tensioned braiding carriers without spooling the filaments to the tensioned braiding carriers to form a braided stent having atraumatic ends.

First claim

What is claimed is:

1 . A braided stent comprising:
a plurality of elongate filaments inter-braided to form a braided tubular structure, the filaments being inter-braided at a braiding angle formed at crossing filament locations; the braided tubular structure having:
a first region having a first diameter;
a second region having a second diameter which is different from the first diameter; and
a transition region extending between the first region and the second region;
wherein the braiding angle in the first region is 110±3 degrees, the braiding angle in the second region is 110±3 degrees, and the braiding angle in the transition region is 110±3 degrees.

2 . The braided stent of claim 1 , wherein the braided tubular structure includes a first atraumatic end and a second atraumatic end opposite the first atraumatic end.

3 . The braided stent of claim 2 , wherein the plurality of elongate filaments are bent about a medical portion thereof at the first atraumatic end.

4 . The braided stent of claim 2 , wherein the plurality of elongate filaments are bent into closed loops at the second atraumatic end.

5 . The braided stent of claim 4 , wherein the plurality of elongate filaments forming the closed loops are welded together.

6 . The braided stent of claim 1 , wherein the plurality of elongate filaments are selected from the group consisting of metallic filaments, polymeric filaments, and combinations thereof.

7 . The braided stent of claim 1 , wherein the plurality of elongate filaments are metallic filaments.

8 . The braided stent of claim 7 , wherein the plurality of elongate filaments are formed of nitinol.

9 . The braided stent of claim 1 , wherein the plurality of elongate filaments are composite filaments comprising a first metal and a second metal surrounding the first metal.

10 . The braided stent of claim 9 , wherein the first metal is platinum.

11 . The braided stent of claim 10 , wherein the second metal is nitinol.

12 . The braided stent of claim 1 , wherein the braided tubular structure has a one-under and one-over braid pattern.

13 . The braided stent of claim 1 , wherein the braided tubular structure has a two-under and two-over braid pattern.

14 . The braided stent of claim 1 , further comprising a polymeric coating disposed on the braided tubular structure.

15 . The braided stent of claim 14 , wherein the polymeric coating comprises silicone.

16 . The braided stent of claim 1 , wherein the first region of the braided tubular structure extends to a first end of the stent.

17 . The braided stent of claim 16 , wherein the first region of the braided tubular structure is a flared end region.

18 . The braided stent of claim 17 , wherein the second region of the braided tubular structure has a constant diameter along a majority of a length of the stent.

19 . The braided stent of claim 18 , wherein the second region extends to a second end of the stent.

20 . The braided stent of claim 1 , wherein the transition region is a tapered region of the braided tubular structure.

Assignees

• Boston Scient Scimed Inc

Inventors

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

Classifications

• A61F2240/00

  Manufacturing or designing of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof · CPC title

• A61F2230/0069

  cylindrical · CPC title

• A61F2/90

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

• 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

• D04C1/06 Primary

  Braid or lace serving particular purposes · CPC title