Braided stent

• US 20070112415A1
• Filed: 01/12/2007
• Published: 05/17/2007
• Est. Priority Date: 07/16/1999
• Status: Abandoned Application

• Current Assignee: Abbott Laboratories
• Original Assignee: Abbott Laboratories
• Inventors: Bartlett, Jeremy
• Application Number:
  US11/652,559
• Publication Number:
  US 20070112415A1
• Time in Patent Office: Days
• US Class Current: 623/1.150
• CPC Class Codes: A61F 2/07 Stent-grafts
• CPC Class Codes: A61F 2/90 characterised by a net-like or mesh-like structure
• CPC Class Codes: A61F 2002/075 the stent being loosely attached to the graft material, e.g. by stitching
• CPC Class Codes: A61F 2230/0054 V-shaped
• CPC Class Codes: A61F 2230/0067 conical
• CPC Class Codes: A61F 2250/0039 differing in diameter

Abstract

A radially self-expanding stent for implantation in a body passage comprises first and second sets of mutually counter-rotating metallic filaments which are braided together and define a tubular stent body having two ends which is mechanically biassed towards a first radially expanded configuration in which it is unconstrained by externally applied forces and can be retained in a second radially compressed configuration, and in which some or all of the filaments ends at the ends of the body are fixed together in pairs each consisting of counter-rotating filaments by placing the filaments over one another and placing them adjacent to and substantially parallel to one another and further comprising a join at each end fixing to retain the ends of the filaments in contact with one another.

Claims

1. A radially self-expanding stent for implantation in a body passage comprises first and second sets of mutually counter-rotating metallic filaments which are braided together and define a tubular stent body having two ends which is mechanically biassed towards a first radially expanded configuration in which it is unconstrained by externally applied forces and can be retained in a second radially compressed configuration, and in which some or all of the filament ends at the ends of the body are fixed together in pairs each consisting of counter-rotating filaments by placing the filaments over one another and placing them adjacent to and substantially parallel to one another and further comprising a join at each end fixing to retain the ends of the filaments in contact with one another, wherein some but not all of the filament ends are welded.

2. A stent according to claim 1, wherein the join generally has a diameter of at least 1.2 times that of the diameter of the filament.

3. A stent according to claim 1, wherein the diameter of the join is no more than 3 times the diameter of the filament.

4. A stent according to claim 1, wherein at least some of the joins provide a shoulder in a rearward axial direction.

5. A stent according to claim 1, wherein the diameter of the join is less than 2.5 times the diameter of the filament.