STENT GRAFT

• US 20110213455A1
• Filed: 05/18/2009
• Published: 09/01/2011
• Est. Priority Date: 08/04/2008
• Status: Active Grant

• Current Assignee: Bentley Innomed Gmbh
• Original Assignee: Abbott Laboratories Limited (Abbott Laboratories Incorporated)
• Inventors: Obradovic, Milisav, Bregulla, Rainer
• Granted Patent: US 8,496,697 B2
• Time in Patent Office: Days
• US Class Current: 623/1.15
• CPC Class Codes: A61F 2/07 Stent-grafts
• CPC Class Codes: A61F 2/852 Two or more distinct overlapping stents
• 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 2/91 made from perforated sheet material or tubes, e.g. perforated by laser cuts or etched holes
• CPC Class Codes: A61F 2/915 with bands having a meander structure, adjacent bands being connected to each other
• CPC Class Codes: A61F 2002/072 Encapsulated stents, e.g. wire or whole stent embedded in lining
• CPC Class Codes: A61F 2002/91575 connected peak to trough
• CPC Class Codes: A61F 2220/0058 soldered or brazed or welded
• CPC Class Codes: A61F 2250/0063 Nested prosthetic parts

Abstract

A stent-graft including an inner stent having a wall structure including juxtaposed strut-patterns with interconnected struts and connectors connecting the strut-patterns is described. The wall structure of the inner stent has a predetermined length. An outer stent is coaxially arranged around the inner stent and has a wall structure including juxtaposed strut-patterns with interconnected struts and connectors connecting the strut-patterns. The wall structure of the outer stent has a predetermined length and a flexible stretchable material layer arranged between the inner stent and the outer stent. The wall structure of the inner stent has a design differing from the design of the wall structure of the outer stent and the length of the inner stent is equal to the length of the outer stent.

Claims

1. A stent-graft comprising:

an inner stent having a wall structure including juxtaposed strut-patterns with interconnected struts and connectors connecting the strut-patterns, the wall structure of the inner stent having a predetermined length;

an outer stent coaxially arranged around the inner stent and having a wall structure including juxtaposed strut-patterns with interconnected struts and connectors connecting the strut-patterns, the wall structure of the outer stent having a predetermined length; and

a flexible stretchable material layer arranged between the inner stent and the outer stent, the wall structure of the inner stent having a design differing from the design of the wall structure of the outer stent, and the length of the inner stent being equal to the length of the outer stent.

2. The stent-graft according to claim 1, wherein the struts of the inner stent are shorter than the struts of the outer stent and wherein the connectors of the inner stent are longer than the connectors of the outer stent.

3. The stent-graft according to claim 1, wherein the struts of the inner stent are shorter than the struts of the outer stent and the connectors of the inner stent have the same length as the connectors of the outer stent.

4. The stent-graft according to claim 1, wherein the struts of the inner stent are shorter than the struts of the outer stent and wherein straight connectors of the inner stent are provided between strut patters at both ends of the inner stent, the connectors being shorter than straight connectors of the outer stent between strut patterns at both ends of the outer stent.

5. The stent-graft according to claim 4, wherein s-shaped connectors connect all the remaining strut patterns of the inner and outer stents except the two strut patterns at the ends of the inner and outer stent.

6. The stent-graft according to claim 5, wherein a welding zone comprising a welding point is arranged at crown ends of the outer and inner stents for fixing the inner and outer stents to one another.

7. The stent graft according to claim 3, wherein the inner stent has at least one additional strut pattern.

8. The stent graft according to claim 5, wherein the s-shaped connectors have the same length and width than the s-shaped connectors of the outer stent.

9. A stent-graft comprising:

an inner stent having a wall structure including juxtaposed strut-patterns with interconnected struts and connectors connecting the strut-patterns, the wall structure of the inner stent having a predetermined length;

an outer stent coaxially arranged around the inner stent and having a wall structure including juxtaposed strut-patterns with interconnected struts and connectors connecting the strut-patterns, the wall structure of the outer stent having a predetermined length; and

a flexible stretchable material layer arranged between the inner stent and the outer stent, the wall structure of the inner stent having a design differing from the design of the wall structure of the outer stent, and the length of the inner stent being equal to the length of the outer stent, the struts of the inner stent being shorter than the struts of the outer stent.

10. The stent-graft according to claim 9, wherein the inner stent has at least one additional strut pattern.

11. The stent-graft according to claim 9, wherein the connectors of the inner stent have the same length as the connectors of the outer stent.

12. The stent-graft according to claim 9, wherein straight connectors of the inner stent are provided between strut patters at both ends of the inner stent.

13. The stent graft according to claim 12, wherein the connectors of the inner stent are shorter than straight connectors of the outer stent between strut patterns at both ends of the outer stent.

14. The stent-graft according to claim 13, wherein s-shaped connectors connect all the remaining strut patterns of the inner and outer stents except the two strut patterns at the ends of the inner and outer stent.

15. The stent graft according to claim 14, wherein the s-shaped connectors have the same length and width than the s-shaped connectors of the outer stent

16. The stent-graft according to claim 14, wherein a welding zone comprising a welding point is arranged at crown ends of the outer and inner stents for fixing the inner and outer stents to one another.