STENT WITH POLISHED EYELET

• US 20090248134A1
• Filed: 12/19/2008
• Published: 10/01/2009
• Est. Priority Date: 12/26/2007
• Status: Abandoned Application

• Current Assignee: MED Institute, Inc. (Cook Group Incorporated)
• Original Assignee: MED Institute, Inc. (Cook Group Incorporated)
• Inventors: Leewood, Alan R., Dierking, William K., Roeder, Blayne A.
• Application Number:
  US12/340,293
• Publication Number:
  US 20090248134A1
• Time in Patent Office: Days
• US Class Current: 623/1.150
• CPC Class Codes: A61F 2/07 Stent-grafts
• CPC Class Codes: A61F 2/89 the wire-like elements comprising two or more adjacent rings flexibly connected by separate members
• CPC Class Codes: A61F 2/91 made from perforated sheet material or tubes, e.g. perforated by laser cuts or etched holes
• CPC Class Codes: A61F 2002/072 Encapsulated stents, e.g. wire or whole stent embedded in lining
• CPC Class Codes: A61F 2002/075 the stent being loosely attached to the graft material, e.g. by stitching
• CPC Class Codes: A61F 2002/3011 Cross-sections or two-dimensional shapes
• CPC Class Codes: A61F 2230/0002 Two-dimensional shapes, e.g. cross-sections
• CPC Class Codes: Y10T 29/49996 Successive distinct removal operations

Abstract

A stent for use in a stent graft comprising a strut region comprising at least two struts, the struts having at least one radius of curvature; a bend connecting the at least two struts and forming an eyelet region, where the strut region and the eyelet region are electropolished and the eyelet region is locally polished; and an eyelet positioned in the eyelet region, having at least one radius of curvature greater than zero is provided. A method of manufacturing the same also is provided.

Claims

1. A stent for use in a stent graft comprising:

a strut region comprising at least two struts, the struts having at least one radius of curvature;

a bend connecting the at least two struts and forming an eyelet region, where the strut region and the eyelet region are electropolished and the eyelet region is locally polished; and

an eyelet positioned in the eyelet region having at least one radius of curvature greater than 0.

2. The stent of claim 1, where the at least one radius of curvature of the at least two struts is about 0.001 mm or less.

3. The stent of claim 1, where the eyelet has a generally elliptical shape.

4. The stent of claim 1, where the at least one radius of curvature of the eyelet is in a range of about 0.01 mm to a value where a cross-section of the eyelet is round.

5. The stent of claim 1, where the at least one radius of curvature of the eyelet is an order of magnitude greater than the at least one radius of curvature of the at least two struts.

6. The stent of claim 5, where the at least one radius of curvature of the eyelet is 0.01 mm and the radius of curvature of the at least two struts is 0.001 mm.

7. The stent of claim 1, where the at least one radius of curvature of the eyelet is no less than 1/10 a radius of at least one suture.

8. The stent of claim 1, where the at least one radius of curvature of the eyelet is no less than 1/10 radius of at least one suture and is at least an order of magnitude greater than the at least one radius of curvature of the at least two struts.

9. The stent of claim 1 comprising at least two or more of any of the following:

where the at least one radius of curvature of the at least two struts is about 0.001 mm or less;

where the eyelet has a generally elliptical shape;

where the at least one radius of curvature of the eyelet is in a range of about 0.01 mm to a value where a cross-section of the eyelet is round;

where the at least one radius of curvature of the eyelet is an order of magnitude greater than the at least one radius of curvature of the at least two struts;

where the at least one radius of curvature of the eyelet is 0.01 mm and the radius of curvature of the at least two struts is 0.001 mm;

where the at least one radius of curvature of the eyelet is no less than 1/10 a radius of at least one suture;

where the at least one radius of curvature of the eyelet is no less than 1/10 radius of at least one suture and is at least an order of magnitude greater than the at least one radius of curvature of the at least two struts.

10. The stent of claim 1, where the eyelet is secured to a graft material with at least one suture.

11. The stent of claim 10, where the eyelet is secured to the graft material with two sutures.

12. The stent of claim 1 where:

the eyelet has a generally elliptical shape;

the at least one radius of curvature of the at least two struts is about 0.001 mm or less;

the at least one radius of curvature of the eyelet is in a range of about 0.01 mm to a value where a cross-section of the eyelet is round, is an order of magnitude greater than the at least one radius of curvature of the at least two struts, and is no less than 1/10 a radius of at least one suture; and

the eyelet is secured to a graft material with the at least one suture.

13. A method for manufacturing a stent, the method comprising:

laser cutting a cannula of stent material to form the stent, the stent comprising a strut region comprising at least two struts, the at least two struts having at least one radius of curvature, and an eyelet region, the eyelet region comprising an eyelet having at least one radius of curvature;

electropolishing the stent region and the eyelet region; and

locally polishing the eyelet region such that the at least one radius of curvature of the eyelet is greater than 0.

14. The method for manufacturing a stent of claim 13, the method further comprising locally polishing the eyelet region such that the at least one radius of curvature of the eyelet is in a range of about 0.01 mm to a value where a cross-section of the eyelet is circular.

15. The method for manufacturing a stent of claim 13, the method further comprising locally polishing the eyelet region such that the at least one radius of curvature of the eyelet is at least an order of magnitude greater than a radius of curvature of the at least two struts.

16. The method for manufacturing a stent of claim 13, the method further comprising locally polishing the eyelet region such that the at least one radius of curvature of the eyelet is no less than 1/10 the radius of at least one suture.

17. The method for manufacturing a stent of claim 13, the method further comprising securing the eyelet to a graft material with at least one suture.

18. A method for manufacturing an endoluminal device, the method comprising:

cannula cutting a sheet of stent material to form a stent, the stent comprising a strut region comprising at least two struts and an eyelet region,

the eyelet region comprising an eyelet having at least one radius of curvature, electropolishing the stent region and the eyelet region; and

locally polishing the eyelet region such that the at least one radius of curvature of the eyelet is an order of magnitude less than the radius of curvature of the radius of curvature of the at least two struts and the radius of curvature of the eyelet is no less than 1/10 the radius of at least one suture.

19. The method of manufacturing the endoluminal device of claim 18, the method further comprising securing the eyelet to a graft material with the at least one suture.

20. The method of manufacturing the endoluminal device of claim 19 where each eyelet is secured to a graft material with at least two sutures.