Implant and method for producing the same

Patent metadata

Field	Value
Publication number	US-10271941-B2
Application number	US-201113090479-A
Country	US
Kind code	B2
Filing date	Apr 20, 2011
Priority date	Apr 23, 2010
Publication date	Apr 30, 2019
Grant date	Apr 30, 2019

Abstract

An implant having a preferably hollow cylindrical basic structure. A nonwoven fabric is disposed in and/or on the basic structure, the nonwoven fabric preferably comprising biocompatible thermoplastic polyurethane and/or a polymer selected from the group consisting of polylactic acid; polycaprolactone, and a copolymer thereof, and/or a polymer including polyphosphazene. At least in at least one section of the implant, preferably at the proximal and/or distal ends of the implant, fastening means are provided or the nonwoven fabric is treated such that, at least in the expanded state of the implant, the protrusion of nonwoven fabric sections from the implant is significantly reduced. Furthermore, a method for producing such an implant is provided.

First claim

What is claimed is:

1. An endovascular stent comprising:
a basic structure formed as a hollow cylinder;
a nonwoven fabric disposed in and/or on the basic structure, the nonwoven fabric comprising a biocompatible thermoplastic polyurethane and/or a polymer selected from the group consisting of polylactic acid, polycaprolactone, a copolymer thereof, and a polyphosphazene;
wherein a proximal and/or a distal end of the stent, further comprises a fastening means to prevent or reduce, at least in an expanded state of the stent, either:
a protrusion of nonwoven fabric sections from the basic structure, and/or formation of more extensive regions, which comprises fibers or fiber sections protruding from the basic structure.

2. The endovascular stent according to claim 1 , wherein the fastening means comprises a torsion spring disposed on an inside of the basic structure and/or on an outside of the basic structure.

3. The endovascular stent according to claim 1 , wherein the fastening means is formed in the at least one section by connectors disposed on the basic structure.

4. The endovascular stent according to claim 1 , wherein the fastening means comprises strut elements, which optionally extend in the axial direction.

5. The endovascular stent according to claim 1 , wherein the fastening means comprises a hydrogel and/or a hydrogel-based adhesive, which is disposed on an outside of the nonwoven fabric.

6. The endovascular stent according to claim 1 , wherein the fastening means comprises axially extending reinforcement elements, which are provided on the basic structure.

7. The endovascular stent according to claim 1 , wherein the fastening means comprises an elastic element, optionally an elastic ring.

8. The endovascular stent according to claim 1 , characterized in that the nonwoven fabric is electrospun nonwoven fabric.

9. The endovascular stent according to claim 1 , wherein the basic structure comprises a metal or metal alloy.

10. The endovascular stent according to claim 8 , wherein the fastening means is an elastic element comprising electrospun nonwoven fabric.

11. An endovascular stent comprising:
a basic structure formed as a hollow cylinder; and
a nonwoven fabric disposed in and/or on the basic structure, the nonwoven fabric comprising a biocompatible thermoplastic polyurethane and/or a polymer selected from the group consisting of polylactic acid, polycaprolactone, a copolymer thereof, and a polyphosphazene;
wherein at a proximal and/or a distal end of the stent, the nonwoven fabric is treated to prevent or reduce, at least in an expanded state of the stent, either:
a protrusion of nonwoven fabric sections from the basic structure, and/or formation of more extensive regions, which comprises fibers or fiber sections protruding from the basic structure.

12. The endovascular stent according to claim 11 , characterized in that the nonwoven fabric is electrospun nonwoven fabric.

13. The endovascular stent according to claim 12 , characterized in that the treatment produces an elastic element.

14. The endovascular stent according to claim 2 , wherein the torsion spring is disposed on an inside of the basic structure.

Assignees

• Wintsch Daniel
• Loher Stefan
• Quint Bodo
• Bachmann Patrice
• Lang Hans
• Pantic Dragica
• Schwitzer Alwin
• Biotronik Ag

Inventors

• Wintsch Daniel
• Loher Stefan
• Quint Bodo
• Bachmann Patrice
• Lang Hans
• Pantic Dragica
• Schwitzer Alwin

Classifications

• Y10T428/24008

  including fastener for attaching to external surface · CPC title

• A61F2/07 Primary

  Stent-grafts · CPC title

• A61L31/06

  obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds {(A61L31/041 takes precedence)} · CPC title

• A61F2002/072

  Encapsulated stents, e.g. wire or whole stent embedded in lining · CPC title

• A61F2/90

  characterised by a net-like or mesh-like structure · CPC title