Warp knitted carotid patch having finished selvedged edges

• US 5,456,711 A
• Filed: 07/22/1993
• Issued: 10/10/1995
• Est. Priority Date: 05/15/1992
• Status: Expired due to Fees

• Current Assignee: InterVascular, Inc. (Getinge AB)
• Original Assignee: InterVascular, Inc. (Getinge AB)
• Inventors: Hudson, John O.
• Primary Examiner(s): PREBILIC, PAUL B
• Application Number:
  US08/096,217
• Time in Patent Office: 810 Days
• Field of Search: 602/42, 602/43, 602/44, 602/75, 602/76, 606/151, 606/152, 606/153, 606/155, 600/37, 623/1, 66/192, 66/195, 66/202
• US Class Current: 623/1.5
• CPC Class Codes: A61F 2/0063 Implantable repair or support meshes, e.g. hernia meshes
• CPC Class Codes: A61F 2/06 Blood vessels
• CPC Class Codes: A61F 2002/0068 having a special mesh pattern
• CPC Class Codes: D04B 21/20 specially adapted for knitting articles of particular configuration
• CPC Class Codes: D10B 2509/06 Vascular grafts; stents

Abstract

A warp knitted vascular patch material, made in specific widths, the selvedges of the material are specially finished on the knitting machine without the introduction of additional threads to give a strong edge which will not fray and give firm support for the sutures. The specially knitted edges enables small neat sutures to be made without the risk of pulling out. This prevents all the problems of fraying edges and bulky seams found when unsized material is cut to the required width. This patch material is designed specifically for arterial closure following a carotid endorectomy.

Claims

1. A warp knitted carotid patch for arterial closure after an endarectomy, said carotid patch comprising a warp knitted yarn having a predetermined width dimensioned for closure of said artery after said endarectomy and with finished knitted selvedged edges consisting essentially of said warp knitted yarn to avoid the need to cut to width.

2. A warp knitted carotid patch according to claim 1 wherein said carotid patch is fabricated on a knitting machine having front and rear guide bars threaded and gaited to produce said finished knitted selvedged edges.

3. A warp knitted carotid patch according to claim 1 having a reverse locknit structure.

4. A warp knitted carotid patch according to claim 1 wherein said warp knitted yarn comprises a polyester yarn.

5. A warp knitted carotid patch according to claim 3 wherein said polyester yarn comprises 56 gauge polyester.

6. A warp knitted carotid patch according to claim 1 wherein said yarn count is in the range of 40 denier to 100 denier.

7. A warp knitted carotid patch according to claim 6 wherein said polyester yarn comprises 70 denier 34 filament.

8. A warp knitted carotid patch according to claim 1 wherein one surface of said patch comprises filaments of yarn raised in loops above the surface to form a raised texture or velour.

9. A warp knitted carotid patch according to claim 1 wherein said warp knitting machine has a gauge range of between 28 and 32 needles per inch.

10. A warp knitted carotid patch according to claim 1 having a sharkskin construction.

11. A warp knitted carotid patch according to claim 1 having a queen'"'"'s cord construction.

12. A warp knitted carotid patch according to claim 1 having a width within the range of from about 4 mm to about 16 mm wide.

13. A warp knitted carotid patch for arterial closure after an endarectomy, said carotid patch having a first surface and a second surface, said first surface being substantially smooth, and said second surface being characterized by filaments of yarn raised in loops above said second surface to form a raised texture or velour, said carotid patch further having a predetermined width dimensioned for closure of said artery after said endarectomy and with finished knitted selvedged edges to avoid the need to cut to width.

14. A warp knitted carotid patch according to claim 13 wherein said carotid patch is fabricated on a knitting machine having front and rear guide bars threaded and gaited to produce said finished selvedged edges.

15. A warp knitted carotid patch according to claim 13 having a reverse locknit construction.

16. A warp knitted carotid patch according to claim 13 having a sharkskin construction.

17. A warp knitted carotid patch according to claim 13 having a queen'"'"'s cord construction.

18. A warp knitted carotid patch according to claim 13 wherein said warp knitted yarn comprises polyester.