Stent with a crush-resistant zone

Patent metadata

Field	Value
Publication number	US-11241320-B2
Application number	US-202016895153-A
Country	US
Kind code	B2
Filing date	Jun 8, 2020
Priority date	Jun 6, 2006
Publication date	Feb 8, 2022
Grant date	Feb 8, 2022

Abstract

An endoluminal prosthesis system for a branched body lumen comprises a branch vessel prosthesis. The branch vessel prosthesis is deployable within a branch vessel body lumen and comprises a stent having a generally tubular body portion, a flareable proximal end portion, and a coupling portion disposed intermediate the body portion and the flareable portion. The coupling portion is more crush-resistant than the body portion. The flareable proximal end may be disposed within a fenestrated stent graft with coupling portion disposed in the fenestration of the fenestrated stent graft.

First claim

The invention claimed is:

1. A balloon expandable stent graft comprising:
a generally tubular body of graft material and at least one stent structure coupled to the generally tubular body of graft material, the stent structure comprising:
a generally tubular body portion comprising a plurality of rows of cells disposed circumferentially about the generally tubular body, each row of cells having an axial dimension,
a flareable proximal end portion having an axial dimension and comprising a plurality of cells disposed circumferentially about the generally tubular body and including at least two longitudinally interconnected flare cells, and
a crush resistant coupling portion disposed at the distal end of the flareable proximal end portion and proximal of the generally tubular body portion,

wherein the axial dimension of the flareable proximal end portion is greater than the axial dimension of each of the cells of the plurality of rows of cells of the generally tubular body portion, and
wherein the crush resistant coupling portion is more crush-resistant than the body portion such that the crush resistant region is more resistant to plastic deformation than the body portion when exposed to a concentrated and localized stress.

2. The balloon expandable stent graft of claim 1 , wherein the flareable proximal end and the generally tubular body portion comprise separate stent structures that are longitudinally displaced from each other and connected through the graft material.

3. The balloon expandable stent of claim 2 , wherein the generally tubular body portion comprises separate stent structures.

4. The balloon expandable stent graft of claim 1 , wherein the crush resistant region is configured to align with a fenestration of a previously placed fenestrated main graft and is configured to disperse contact loading from the fenestration.

5. The balloon expandable stent graft of claim 1 , wherein the balloon expandable stent graft is disposed over a balloon of a delivery device comprising a first positional indicator aligned with the proximal end of the balloon expandable stent graft, a second positional indicator aligned with the crush resistant region and a third positional indicator aligned with the distal end of the balloon expandable stent graft.

6. The balloon expandable stent graft of claim 1 , wherein the cells of the at least two longitudinally interconnected connected flare cells have peaks and valleys and are arranged in an alternating pattern so that peaks in a flare cell are axially-aligned with valleys in a longitudinally adjacent flare cell.

7. The balloon expandable stent graft of claim 1 , wherein the balloon expandable stent graft is disposed over a balloon of a delivery device and wherein the balloon has a first region with an inflated diameter and a second region having an inflated diameter greater than the first inflated diameter.

8. The balloon expandable stent graft of claim 7 , wherein the first region is configured to engage and expand the tubular body portion of the stent graft and the second region is configured to engage and flare the flareable proximal end portion.

9. The balloon expandable stent of claim 1 , wherein the graft material of the generally tubular body covers the entire stent structure.

10. A balloon expandable stent graft configured to be placed within a fenestration of a previously placed main body graft, comprising:
a generally tubular body of graft material;
a stent structure coupled to the graft material, the stent structure comprising:
a generally tubular body portion;
a flareable proximal end portion having a proximal end configured to extend through the fenestration, a distal end, and at least two longitudinally interconnected flare cells,
a crush resistant coupling portion disposed at the distal end of the flareable proximal end portion and proximal of the body portion and configured to extend within the fenestration and to disperse contact loading from the fenestration;

wherein the crush resistant coupling portion is more crush-resistant than the body portion such that the crush resistant region is more resistant to plastic deformation than the body portion when exposed to a concentrated and localized stress.

11. The balloon expandable stent graft of claim 10 , wherein the flareable proximal end and the body portion comprise separate stent structures that are longitudinally displaced from each other and connected through the graft.

12. The balloon expandable stent of claim 11 , wherein the generally tubular body portion comprises separate stent structures.

13. The balloon expandable stent graft of claim 10 , wherein the balloon expandable stent graft is disposed over a balloon of a delivery device comprising a first positional indicator aligned with the proximal end of the stent graft, a second positional indicator aligned with the crush resistant region and a third positional indicator aligned with the distal end of the stent graft.

14. The balloon expandable stent graft of claim 10 , wherein the at least two longitudinally connected flare cells are arranged in an alternating pattern so that peaks in a flare cell are axially-aligned with valleys in a longitudinally adjacent flare cell.

15. The balloon expandable stent of claim 10 , wherein the graft material of the generally tubular body covers the entire stent structure.

16. A balloon expandable stent graft comprising:
a generally tubular body of graft material and at least one stent structure coupled to the generally tubular body of graft material, the stent structure comprising:
a generally tubular body portion comprising a plurality of rows of cells, each row of cells having an axial dimension,
a proximal end portion having an axial dimension and comprising a plurality of cells, wherein at least a portion of the proximal end portion is configured to flare outwardly upon application of an external flaring force, and
a crush resistant coupling portion disposed at the distal end of the proximal end portion and proximal of the generally tubular body portion and configured to engage a fenestration of a previously placed fenestrated device and to disperse contact loading from the fenestration;
wherein the crush resistant coupling portion is more crush-resistant than the generally tubular body portion such that the crush resistant zone is more resistant to plastic deformation than the body portion when exposed to a concentrated and localized stress.

17. The balloon expandable stent graft of claim 16 , wherein the flareable proximal end and the generally tubular body portion comprise separate stent structures that are longitudinally displaced from each other and connected through the graft material.

18. The balloon expandable stent of claim 16 , wherein the graft material of the generally tubular body at least partially covers the stent structure.

19. The balloon expandable stent of claim 18 , wherein the graft material of the generally tubular body entirely covers the stent structure.

20. A balloon expandable stent graft comprising:
a generally tubular body of graft material and at least one stent structure coupled to the generally tubular body of graft material, the stent structure comprising:
a generally tubular body portion comprising a plurality of rows of cells, each row of cells having an axial dimension,
a proximal end portion comprising a plurality of cells, a flareable zone adjacent a proximal end of the proximal end portion and a crush resistant coupling portion disposed distal of the proximal end of

Assignees

• Cook Medical Technologies Llc

Inventors

• Schaeffer Darin G
• Boatman Scott E
• Dittman Jay A
• Hartley David Ernest

Classifications

• A61F2/07 Primary

  Stent-grafts · CPC title

• A61F2250/0039

  differing in diameter · CPC title

• A61F2002/821

  Ostial stents · CPC title

• A61F2002/91558

  connected peak to peak · CPC title

• A61F2002/91566

  connected trough to trough · CPC title