Stent and method and device for fabricating the stent

Patent metadata

Field	Value
Publication number	US-10098766-B2
Application number	US-51016609-A
Country	US
Kind code	B2
Filing date	Jul 27, 2009
Priority date	Aug 19, 2008
Publication date	Oct 16, 2018
Grant date	Oct 16, 2018

Abstract

Stent, as well as a method and device for fabricating the stent, wherein the stent has a tubular lattice structure comprising individual struts and at least one strut of which at least one longitudinal section runs with at least one directional component in the radial circumferential direction of the stent, wherein the surface of the longitudinal section facing the outside of the stent is curved only about the longitudinal axis of the stent. According to the invention, the surface of longitudinal section of the strut, which surface faces the inside of the stent, has such a curvature that the strut cross section is fluidically optimized.

First claim

What is claimed is:

1. A stent, comprising a tube-like lattice structure comprising individual struts, wherein the stent has at least one strut, positioned at a first end region of the stent, and at least one strut, positioned at a second end region of the stent opposing the first end region, wherein each of the at least one strut at the first and second end regions have at least one longitudinal section that does not run parallel to a longitudinal axis of the stent, wherein the inner surface of each of the at least one strut at the first and second end regions is of an asymmetric convex shape defined by a plane of asymmetry perpendicular to the longitudinal axis of the stent and longitudinally aligned at a middle of the at least one strut, and wherein the asymmetric convex shape of the at least one strut at the first end region is a mirror image of the asymmetric convex shape of the at least one strut at the second end region, defined by a plane of mirror symmetry perpendicular to the longitudinal axis of the stent.

2. The stent according to claim 1 , wherein the stent comprises a biodegradable material.

3. The stent according to claim 1 , wherein all of the struts of the stent have at least one longitudinal section that does not run parallel to the longitudinal axis of the stent.

4. The stent according to claim 1 , wherein the at least one strut at the first end region is separated from the at least one strut at the second end region by at least one innermost strut having an inner surface lacking a rounded shape, wherein each of the first and second end regions extends over 20-30% of the length of the stent, starting from each stent end.

5. The stent according to claim 1 , wherein the at least one strut at the first end region is separated from the at least one strut at the second end region by an innermost strut comprising a greater thickness than each of the at least one strut of the first and second end regions.

6. A stent, comprising a tube-like lattice structure comprising individual struts, wherein the stent has at least one strut, positioned at a first end region of the stent, and at least one strut, positioned at a second end region of the stent opposing the first end region, wherein each of the at least one strut at the first and second end regions have at least one longitudinal section that does not run parallel to a longitudinal axis of the stent, wherein the outside surface of each of the at least one strut at the first and second end regions is curved about the longitudinal axis of the stent, and wherein the inner surface of each of the at least one strut at the first and second end regions is of an asymmetric convex shape defined by a plane of asymmetry perpendicular to the longitudinal axis of the stent and longitudinally aligned at a middle of the at least one strut, further wherein the asymmetric convex shape of the at least one strut at the first end region is a mirror image of the asymmetric convex shape of the at least one strut at the second end region, defined by a plane of mirror symmetry perpendicular to the longitudinal axis of the stent, thereby providing the stent with a fluidically optimized proximal end that is independent of implantation orientation.

7. The stent according to claim 6 , wherein the stent comprises a biodegradable material.

8. The stent according to claim 6 , wherein the at least one strut at the first end region is separated from the at least one strut at the second end region by at least one innermost strut having an inner surface lacking a rounded shape, wherein each of the first and second end regions extends over 20-30% of the length of the stent, starting from each stent end.

9. The stent according to claim 6 , wherein the at least one strut at the first end region is separated from the at least one strut at the second end region by an innermost strut comprising a greater thickness than each of the at least one strut of the first and second end regions.

Assignees

• Harder Claus
• Biotronik Ag

Inventors

• Harder Claus

Classifications

• A61F2/915 Primary

  with bands having a meander structure, adjacent bands being connected to each other · CPC title

• A61F2/82

  Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents (stent-grafts for tubular structures of the body other than blood vessels A61F2/04; stent-grafts for blood vessels A61F2/07) · CPC title

• A61F2/91

  made from perforated sheets or tubes, e.g. perforated by laser cuts or etched holes · CPC title

• A61F2002/068

  Modifying the blood flow model, e.g. by diffuser or deflector · CPC title

• A61F2002/9155

  Adjacent bands being connected to each other · CPC title