Stent Graft and Introducer Assembly

• US 20110125249A1
• Filed: 11/15/2010
• Published: 05/26/2011
• Est. Priority Date: 11/19/2009
• Status: Active Grant

• Current Assignee: Cook Medical Incorporated (Cook Group Incorporated)
• Original Assignee: Cook Incorporated (Cook Group Incorporated), MED Institute, Inc. (Cook Group Incorporated), William Cook Europe ApS (Cook Group Incorporated)
• Inventors: Jensen, Kim Moegelvang, Rasmussen, Erik, Oehlenschlaeger, Bent
• Granted Patent: US 9,717,611 B2
• Time in Patent Office: Days
• US Class Current: 623/1.15
• CPC Class Codes: A61F 2/07 Stent-grafts
• CPC Class Codes: A61F 2/86 Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure
• 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 2/915 with bands having a meander structure, adjacent bands being connected to each other
• CPC Class Codes: A61F 2/95 Instruments specially adapted for placement or removal of stents or stent-grafts
• CPC Class Codes: A61F 2/9517 handle assemblies therefor
• CPC Class Codes: A61F 2/966 with relative longitudinal movement between outer sleeve and prosthesis, e.g. using a push rod
• CPC Class Codes: A61F 2/9661 the proximal portion of the stent or stent-graft is released first
• CPC Class Codes: A61F 2002/075 the stent being loosely attached to the graft material, e.g. by stitching
• CPC Class Codes: A61F 2230/0013 Horseshoe-shaped, e.g. crescent-shaped, C-shaped, U-shaped
• CPC Class Codes: A61F 2230/0078 hyperboloidal

Abstract

A stent graft (40) for treating Type-A dissections in the ascending aorta (22) is provided with a plurality of diameter reducing suture loops (56-60) operable to constrain the stent graft during deployment thereof in a patient'"'"'s aorta. The diameter reducing loops (56-60) allow the stent graft (40) to be partially deployed, in such a manner that its location can be precisely adjusted in the patient'"'"'s lumen. In this manner, the stent graft can be placed just by the coronary arteries (26, 28) with confidence that these will not be blocked. The stent graft (40) is also provided with proximal and distal bare stents (44,52) for anchoring purposes.

Claims

1. A stent graft for treatment of defects in the ascending aorta including a tubular portion of graft material provided with proximal and distal ends, a plurality of stent rings attached to the graft tube, at least one bare stent extending from the proximal end of the graft tube and designed to flare outwardly relative to the graft tube so as to engage in use the cavity of the aortic sinus of a patient.

2. A stent graft according to claim 1, wherein there are provided bare stents at both the proximal and distal ends of the graft tube.

3. A stent graft according to claim 2, wherein the distal bare stent flares outwardly relative to the graft tubing.

4. A stent graft according to claim 1, wherein the or each bare stent is formed of an undulating stent structure, to provide a series of fingers arranged circumferentially around the graft tubing and having curved ends or apices.

5. A stent graft according to claim 1, wherein the graft tubing is in the region of 65 mm in length.

6. A stent graft according to claim 1, wherein the or each bare stent extends from the graft tubing by around 10 mm.

7. A stent graft according to claim 1, including at least first and second diameter restraining devices, the first diameter restraining device being located at or proximate the proximal end of the graft tube, the or at least one second diameter restraining device being located in an intermediate position along the graft tube.

8. A stent graft according to claim 7, wherein the second diameter restraining device is located substantially half-way along the graft tube.

9. A stent graft according to claim 7, wherein the restraining devices are diameter reducing loops disposed circumferentially around the graft tube.

10. A stent graft according to claim 7, wherein there are provided at least two second or intermediate diameter restraining devices, operable to restrain proximal and distal ends of a stent located on the graft tube or a plurality of stents positioned in an intermediate position along the graft tube.

11. A stent graft according to claim 1, wherein the stent graft is provided with a stent section extending from the distal end of the graft tube.

12. A stent graft according to claim 11, wherein the stent section in one of integral with the graft section and a separate component.

13. A stent graft according to claim 8, wherein the restraining devices are diameter reducing loops disposed circumferentially around the graft.

14. A stent graft according to claim 8, wherein there are provided at least two second or intermediate diameter restraining devices, operable to restrain proximal and distal ends of a stent located on the graft tube or a plurality of stents positioned in an intermediate position along the graft tube.

15. A stent graft according to claim 9, wherein there are provided at least two second or intermediate diameter restraining devices, operable to restrain proximal and distal ends of a stent located on the graft tube or a plurality of stents positioned in an intermediate position along the graft tube.

16. A stent graft according to claim 7, wherein the stent graft is provided with a stent section extending from the distal end of the graft tube.

17. A stent graft for treatment of defects in the ascending aorta including a tubular portion of graft material provided with proximal and distal ends, a plurality of stent rings attached to the graft tube, at least one bare stent extending from the proximal end of the graft tube and designed to flare outwardly relative to the graft tube so as to engage in use the cavity of the aortic sinus of a patient, and including at least first and second diameter restraining devices, the first diameter restraining device being located at or proximate the proximal end of the graft tube, the or at least one second diameter restraining device being located in an intermediate position along the graft tube.

18. A stent graft according to claim 17, wherein the restraining devices are diameter reducing loops disposed circumferentially around the graft tube.

19. A stent graft according to claim 17, wherein there are provided at least two second or intermediate diameter restraining devices, operable to restrain proximal and distal ends of a stent located on the graft tube or a plurality of stents positioned in an intermediate position along the graft tube.

20. A method of treating a vascular defect in the ascending aorta of a patient including the steps of locating in the ascending aorta a stent graft provided with a tubular portion of graft material provided with proximal and distal ends, a plurality of stent rings attached to the graft tube, at least one bare stent extending from the proximal end of the graft tube and designed to