Stent graft with internal constraining mechanism

Patent metadata

Field	Value
Publication number	US-10327935-B2
Application number	US-201615216023-A
Country	US
Kind code	B2
Filing date	Jul 21, 2016
Priority date	Jul 21, 2016
Publication date	Jun 25, 2019
Grant date	Jun 25, 2019

Abstract

A stent graft assembly having a tubular body and a constraining patch attached to the interior surface of the tubular body. The constraining patch delineates a small passageway close to the inner surface of the tubular body. A cannula may extend through the passageway.

First claim

We claim:

1. A stent graft assembly comprising:
A delivery catheter;
a tubular body disposed over the delivery catheter and having a first open end, a second open end, a main lumen between the first open end and the second open end, and an inner surface surrounding the main lumen;
a patch disposed in the main lumen and attached to the inner surface and defining a longitudinally extending passageway between the inner surface and the patch, the patch having a first unattached end and a second unattached end, wherein the delivery catheter extends through the longitudinally extending passageway between the inner surface and the patch and is preloaded within the longitudinally extending passageway;
wherein the passageway is in fluid communication with the main lumen through the first unattached end and the second unattached end;
wherein neither unattached end is in communication with an exterior of the graft; and
wherein in a first configuration the longitudinally extending passageway of the patch is open and configured to temporarily constrain a portion of the delivery catheter within the passageway and in a second configuration is closed and lies flat against a wall of the tubular body.

2. The stent graft assembly of claim 1 wherein the tubular body comprises graft material having a sidewall and a fenestration in the sidewall.

3. The stent graft assembly of claim 2 wherein the patch is circumferentially offset from the fenestration.

4. The stent graft assembly of claim 2 wherein the tubular body has a posterior side and an anterior side, and wherein the patch extends at least partially around a circumference of the inner surface; and wherein the fenestration is on the posterior side and the patch is on the anterior side.

5. The stent graft assembly of claim 1 wherein the patch has at least two lateral edges and the patch is attached to the inner surface at the at least two lateral edges.

6. The stent graft assembly of claim 1 further comprising at least one stent ring.

7. The stent graft assembly of claim 6 wherein the stent is disposed at least partially over the patch and in a first configuration closes the passageway.

8. The stent graft assembly of claim 1 further comprising:
a fenestration in the tubular body,
wherein the first open end is a fluid inlet end and the patch is attached to the inner surface at the first open end.

9. The stent graft of claim 1 , wherein the patch comprises a longitudinal tube of graft material having a first open end toward the stent graft first open end and a second open end toward the stent graft second open end.

10. A stent graft assembly comprising:
a tubular body having a main lumen and an inner surface surrounding the main lumen;
a patch disposed in the main lumen, an inflow end and an outflow end, the patch comprising a piece of material attached to the inner surface that forms a passageway that extends at least longitudinally along the patch and has a first open end and a second open end;
wherein the passageway has a first configuration where a portion of the patch extends away from the inner surface and the passageway is open, and a second configuration where the patch lays flat against the inner surface and the passageway is closed, and
wherein in both the first and second configurations the patch does not obstruct fluid flow through the main lumen and the outflow end.

11. The stent graft assembly according to claim 10 wherein the patch extends partially around a circumference of the inner surface.

12. The stent graft assembly according to claim 10 further comprising
a stent ring disposed about the inner surface and at least partially over the patch.

13. The stent graft assembly according to claim 12 wherein the patch has at least one lateral edge aligned with a strut of the stent ring and wherein the patch is attached to the inner surface at the at least one lateral edge.

14. The stent graft assembly of claim 13 wherein the patch has at least two lateral edges and is attached to the inner surface at the at least two lateral edges.

15. The stent graft assembly of claim 10 wherein the passageway is configured to temporarily receive a medical instrument.

16. The stent graft assembly according to claim 12 wherein the patch is located between the stent ring and the inner surface.

17. A stent graft delivery assembly comprising:
a delivery catheter;
a stent graft disposed over the delivery catheter having a main lumen and an inner surface surrounding the main lumen;
a patch disposed in the main lumen and attached to the inner surface;
the patch forming a constraining tube having a longitudinal constraining lumen extending therethrough, wherein the constraining tube has first and second open ends and wherein neither open end is exposed to an exterior of the stent graft,
wherein the delivery catheter extends through the constraining tube and is preloaded within the constraining tube when the stent graft is deployed, and
wherein in a first configuration the lumen of constraining tube is open and configured to temporarily constrain a portion of the delivery catheter within the constraining tube and in a second configuration lies flat against the inner surface.

18. The stent graft assembly according to claim 17 wherein the constraining tube has a frangible portion extending longitudinally therealong that is susceptible to breaking.

19. The stent graft assembly of claim 17 , wherein the stent graft has a posterior side and an anterior side, where the constraining tube is on the anterior surface of the stent graft and further comprising a fenestration on the posterior surface of the stent graft.

20. A stent graft assembly comprising:
a delivery catheter for delivering the stent graft to the body lumen;
a stent graft disposed over the delivery catheter having a main lumen and an inner surface surrounding the main lumen, the stent graft having a plurality of fenestrations in a side wall of the stent graft;
a patch disposed entirely within the main lumen and attached to the inner surface at a location offset from each of the plurality of fenestrations;
the patch having a longitudinal constraining lumen extending therethrough,
wherein the delivery catheter extends through the longitudinal constraining lumen and is preloaded within the constraining tube when the stent graft is deployed, and
wherein the patch temporarily constrains the delivery catheter against the inner surface and away from the plurality of fenestrations and at least partially restricts latitudinal movement of the delivery catheter within the main lumen.

Assignees

• Cook Medical Technologies Llc

Inventors

• Davis Brandon J
• Kratzberg Jarin A
• Roeder Blayne A
• Macatangay Edwin E
• Skender Davorin K

Classifications

• A61F2/97 Primary

  the outer sleeve being splittable · CPC title

• A61F2002/067

  modular · CPC title

• A61F2/07 Primary

  Stent-grafts · CPC title

• A61F2002/075

  the stent being loosely attached to the graft material, e.g. by stitching · CPC title

• A61F2002/061

  provided with means for allowing access to secondary lumens · CPC title