Stent

• US 20030083734A1
• Filed: 10/24/2002
• Published: 05/01/2003
• Est. Priority Date: 10/25/2001
• Status: Abandoned Application

• Current Assignee: Curative AG
• Original Assignee: Curative AG
• Inventors: Schneider, Detlef, Friedrich, Holger
• Application Number:
  US10/279,943
• Publication Number:
  US 20030083734A1
• Time in Patent Office: Days
• US Class Current: 623/1.15
• CPC Class Codes: A61F 2/90 characterised by a net-like or mesh-like structure
• CPC Class Codes: A61F 2002/821 Ostial stents
• CPC Class Codes: A61F 2230/0078 hyperboloidal

Abstract

A stent for treating vascular stenoses. The stent is insertable into regions of arterial vascular systems close to the ostium. The stent comprises a tubular expandable element made of a mesh fabric which is insertable into the inlet or an outlet of a vessel. The proximal end of the stent is expandable to a trumpet-shaped structure. Using the inventive stent, it is possible in a simple, rapid and safe manner to treat stenoses close to the ostiums of arterial vascular systems so that the entire stenosed region can be covered with a stent.

Claims

1. A stent for insertion into a branch of a vessel such as a renal artery from an abdominal aorta comprising:

a tubular expandable member having a proximal end and a distal end wherein said proximal end flares out in a form of a trumpet shape when said tubular expandable member is in an expanded state.

2. The stent as in claim 1, wherein said trumpet shaped flared structure flares out at an angle between 45 and 60 degrees relative to a longitudinal axis of said stent and is at least 20% larger than a diameter of a tubular portion of said tubular expandable member.

3. The stent as in claim 1, wherein said tubular expandable member comprises a mesh fabric having helically running strands that cross over one another.

4. The stent as in claim 3, wherein said proximal end and said distal end are in the form of expanded rings.

5. A stent as in claim 3, wherein said mesh fabric is made from self expanding material having memory properties.

6. The stent as in claim 5, wherein said mesh fabric is made from Nitinol.

7. The stent according to claim 3, wherein said mesh fabric is made to be self expanding from elastic material.

8. The stent as in claim 3, wherein said mesh fabric is made from plastically deformable material.

9. The stent as in claim 3, wherein said mesh fabric has alternating rigid and flexible regions extending along a direction of the longitudinal axis, wherein said proximal end is constructed as a rigid region.

10. The stent as in claim 9, wherein said flexible regions of said mesh fabric are formed using between three and five strands wherein said strands join said rigid regions of said mesh fabric.