Stent Graft System and Method of Use

• US 20090270966A1
• Filed: 04/24/2008
• Published: 10/29/2009
• Est. Priority Date: 04/24/2008
• Status: Active Grant

• Current Assignee: Medtronic Vascular, Inc. (Medtronic Plc)
• Original Assignee: Medtronic Vascular, Inc. (Medtronic Plc)
• Inventors: Xiao, Jia Hua, Douk, Nareak, Rafiee, Nasser, Bruszewski, Walter, Grills, Peggy, House, Morgan, Machek, James
• Granted Patent: US 7,972,370 B2
• Time in Patent Office: Days
• US Class Current: 623/1.110
• CPC Class Codes: A61B 17/064 Surgical staples, i.e. penetrating the tissue
• CPC Class Codes: A61B 17/068 Surgical staplers , e.g. containing multiple staples or clampsstaplers containing only one staple A61B17/10; magazines or containers for staples A61B17/105; for performing anastomosis A61B17/115; staplers in general B25C5/00
• CPC Class Codes: A61B 2017/0649 Coils or spirals
• 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 2/954 for placing stents or stent-grafts in a bifurcation
• CPC Class Codes: A61F 2002/061 provided with means for allowing access to secondary lumens
• CPC Class Codes: A61F 2002/065 Y-shaped blood vessels
• CPC Class Codes: A61F 2002/075 the stent being loosely attached to the graft material, e.g. by stitching
• CPC Class Codes: A61F 2002/9511 the retaining means being filaments or wires
• CPC Class Codes: A61F 2002/9528 for retrieval of stents
• CPC Class Codes: A61F 2220/0075 sutured, ligatured or stitched, retained or tied with a rope, string, thread, wire or cable

Abstract

A stent graft system and method of use includes a stent graft for fixation at an attachment site with graft material defining at least one opening having an opening perimeter; a support attached to the graft material; a guide rail attached around the opening perimeter; and a helical anchor having a plurality of coils with a point at one end. The plurality of coils are rotatable around the guide rail to cause the pointed end of the coils to penetrate the graft material and the adjacent tissue in contact with the stent graft to sew the stent graft to the attachment site.

Claims

1. A stent graft for fixation at an attachment site comprising:

graft material defining at least one opening having an opening perimeter;

a support attached to the graft material;

a guide rail attached around the opening perimeter; and

a helical anchor having a plurality of coils;

wherein the plurality of coils are rotatable around the guide rail to sew the stent graft to the attachment site.

2. The stent graft of claim 1 wherein the at least one opening is in an end of the graft material.

3. The stent graft of claim 2 wherein the attachment site is a vessel wall circumference.

4. The stent graft of claim 1 wherein the at least one opening is in a side of the graft material.

5. The stent graft of claim 4 wherein the attachment site is a circum-ostial ring encircling at least one ostium.

6. The stent graft of claim 4 wherein the attachment site is a circum-ostial ring encircling a plurality of ostia.

7. The stent graft of claim 1 further comprising a guide rail support attached to the guide rail.

8. The stent graft of claim 1 wherein the graft material has a felt cuff around the opening perimeter, the plurality of coils being rotatable around the guide rail to sew the stent graft to the attachment site through the felt cuff.

9. The stent graft of claim 1 further comprising a guide tether attached to the guide rail.

10. The stent graft of claim 9 wherein the guide tether is attached to the guide rail with a fusible link.

11. The stent graft of claim 9 wherein a solder stub is crimped to the guide rail with a crimpable fitting, a fusible link is attached to the solder stub, and the guide tether is attached to the fusible link.

12. A stent graft system for stent graft fixation at an attachment site comprising:

a stent graft comprising;

graft material defining at least one opening having an opening perimeter;

a support attached to the graft material;

a guide rail attached around the opening perimeter;

a guide tether attached to the guide rail; and

a helical anchor having a plurality of coils; and

a driver releasably connected to the helical anchor and having a driver lumen through which the guide tether can slide;

wherein the plurality of coils are rotatable around the guide rail to sew the stent graft to the attachment site.

13. The stent graft system of claim 12 further comprising:

an anchor guide having a tether lumen through which the guide tether can slide; and

a delivery catheter having a catheter lumen through which the driver can slide;

wherein the helical anchor and driver are slidable over the anchor guide.

14. The stent graft of claim 12 wherein the helical anchor further comprises a sharpened tip at an end of the helical anchor.

15. The stent graft of claim 12 further comprising a felt cuff around the opening perimeter, the plurality of coils being rotatable around the guide rail to sew the stent graft to the attachment site through the felt cuff.

16. The stent graft system of claim 12 wherein the guide tether is attached to the guide rail with a fusible link.

17. The stent graft system of claim 16 further comprising a current source operably connected to provide current through the fusible link.

18. The stent graft system of claim 12 wherein the helical anchor is releasably connected to the driver with a generally U-shaped driver portion at a proximal end of the helical anchor engaged in an indentation in the driver.

19. The stent graft system of claim 12 wherein the helical anchor is releasably connected to the driver with a generally wrapping driver portion at a proximal end of the helical anchor engaged in an indentation in the driver.

20. The stent graft system of claim 12 wherein the helical anchor is releasably connected to the driver with a pin-shaped driver portion at a proximal end of the helical anchor engaged in a hole in the driver.

21. The stent graft system of claim 12 wherein the helical anchor is releasably connected to the driver with a fusible link.

22. A method of fixing a stent graft at an attachment site, the method comprising:

providing a stent graft having a stent graft lumen, the stent graft comprising;

graft material defining an opening, the opening having an opening perimeter;

a support attached to the graft material;

a guide rail attached around the opening perimeter;

a guide tether attached to the guide rail; and

a helical anchor having a plurality of coils;

deploying the stent graft with the guide rail aligned with the attachment site;

advancing the helical anchor through the stent graft lumen to the attachment site along the guide tether;

engaging the helical anchor with the attachment site through the stent graft; and

rotating the helical anchor to sew the stent graft to the attachment site along the guide rail.

23. The method of claim 22 further comprising:

providing a driver releasably connected to the helical anchor and having a driver lumen through which the guide tether can slide;

providing a delivery catheter having a catheter lumen through which the driver can slide; and

providing an anchor guide having a tether lumen through which the guide tether can slide;

wherein the advancing comprises;

advancing the delivery catheter into the stent graft lumen;

advancing the anchor guide within the catheter lumen along the guide tether to the attachment site; and

advancing the helical anchor within the delivery catheter along the anchor guide to the attachment site.

24. The method of claim 22 further comprising detaching the guide tether from the guide rail.

25. The method of claim 22 wherein the guide tether is attached to the guide rail with a fusible link, and further comprising detaching the guide tether from the guide rail by melting the fusible link.