Bifurcated graft device

Patent metadata

Field	Value
Publication number	US-9468545-B2
Application number	US-201514667883-A
Country	US
Kind code	B2
Filing date	Mar 25, 2015
Priority date	Apr 4, 2014
Publication date	Oct 18, 2016
Grant date	Oct 18, 2016

Abstract

A bifurcated graft including a first branch having a first leg graft; a second branch having a second leg graft spaced apart from and not overlapping the first leg graft; and a trunk including a first layer having a first portion, a second portion, and a saddle extending therebetween the first portion and the second portion. Each of the first portion and second portion have opposite side edges that are spaced apart to define a first width. The saddle has opposite sides that are spaced apart to define a second width. The second width of the saddle is less than the first width of each of the first portion and second portion. The saddle extends along a bifurcation between the first leg graft and second leg graft.

First claim

What is claimed is:

1. A bifurcated graft, comprising:
a first branch having a tubular first leg graft defining a first leg lumen;
a second branch having a tubular second leg graft defining a second leg lumen, the second leg graft being spaced apart from and not overlapping the first leg graft; and
a trunk defining a main lumen, the trunk including a first layer having a first portion, a second portion, and a saddle extending therebetween the first portion and the second portion, each of the first portion and second portion having opposite side edges that are spaced apart to define a first width, the saddle having opposite sides that are spaced apart to define a second width,
wherein the saddle extends along a bifurcation between the first leg graft and second leg graft, and the second width of the saddle is less than the first width of each of the first portion and second portion.

2. The bifurcated graft of claim 1 , wherein each first leg graft and second leg graft includes opposite proximal and distal ends, and a tail extending from the proximal end that at least partially overlaps with both the first portion and second portion of the first layer.

3. The bifurcated graft of claim 2 , wherein the trunk includes a substantially cylindrical portion, and a frustoconically shaped portion that extends between the cylindrical portion and the first and second branches.

4. The bifurcated graft of claim 3 , wherein the tails of the first and second leg grafts respectively the first and second portions of the first layer along the frustoconically shaped portion of the trunk.

5. The bifurcated graft of claim 3 , wherein the sides edges of each of the first and second portions of the trunk are generally parallel with a longitudinal axis of the trunk.

6. The bifurcated graft of claim 5 , wherein each side of the first portion overlaps a respective one of the sides of the second portion.

7. A method of manufacturing the bifurcated graft of claim 2 , said method comprising:
providing a mandrel having a trunk section and first and second legs extending from an end of the trunk section;
placing the first leg graft over the first leg of the mandrel;
placing the second leg graft over the second leg of the mandrel;
placing first layer over the trunk section such that the saddle extends along the birfurcation, and the first and second portions extend along opposite sides of the trunk section of the mandrel;
securing the first and second portions of the first layer to each other along overlapping side edges to form a main lumen; and
securing the tails of the first and second legs to the overlapping first and second portions of the first layer so that the main lumen is in fluid communication with the first and second leg lumens.

8. The method as set forth in claim 7 , wherein the mandrel includes a substantially cylindrical section, and a frustoconically shaped section that extends between the cylindrical section and the first and second legs.

9. The method as set forth in claim 8 including helically wrapping a second layer over the first layer along only the cylindrical section of the mandrel.

10. The method as set forth in claim 9 including heating the mandrel to a sufficient temperature to bond the first layer, second layer and overlapped tails of the legs and removing the resulting bifurcated graft from the mandrel.

11. The method as set forth in claim 10 including bonding the resulting bifurcated graft to a stent structure.

12. The bifurcated graft of claim 1 , wherein the opposite sides of the saddle overlap respective first and second leg grafts.

13. The bifurcated graft of claim 1 , wherein the trunk includes a proximal end and an opposite distal end, the first and second branches extending from the distal end of the trunk.

14. The bifurcated graft of claim 13 , wherein proximal end of the trunk is substantially cylindrically shaped and the distal end is substantially frustoconically shaped.

15. The bifurcated graft of claim 14 , wherein each of the first and second portions includes a terminal edge that extends along the proximal end of the trunk, the terminal edges of the first and second portions together approximating a circumference of the proximal end of the trunk.

16. The bifurcated graft of claim 1 including a second layer overlapping the first layer.

17. The bifurcated graft of claim 16 , wherein the second layer extends substantially helically about the trunk.

18. The bifurcated graft of claim 17 , wherein the trunk includes a substantially cylindrical portion and a frustoconically shaped portion that extends between the cylindrical portion and the first and second branches, the second layer extending only along the cylindrical portion.

19. The bifurcated graft of claim 18 , wherein each first leg graft and second leg graft includes opposite proximal and distal ends, and a tail extending from the distal end that at least partially overlaps with both the first portion and second portion of the first layer.

20. The bifurcated graft of claim 19 , wherein the overlap between the tails of the first and second leg grafts and the first and second portions of the first layer extends along the frustoconically shaped portion.

Assignees

• Gore & Ass

Inventors

• Dunn Annette

Classifications

• A61F2002/072

  Encapsulated stents, e.g. wire or whole stent embedded in lining · CPC title

• A61F2/07 Primary

  Stent-grafts · CPC title

• A61F2230/0067

  conical · CPC title

• Y10T156/10

  Methods of surface bonding and/or assembly therefor · CPC title

• A61F2230/0095

  Saddle-shaped · CPC title