Covered stent with encapsulated ends

• US 20040204757A1
• Filed: 04/30/2004
• Published: 10/14/2004
• Est. Priority Date: 03/10/1995
• Status: Active Grant

• Current Assignee: Guido Koch, Richard Layne, Sylvie Lombardi, Tarun J. Edwin, Thomas Kirchhoff, Walter Gamer, Wolfgang Supper
• Original Assignee: Guido Koch, Richard Layne, Sylvie Lombardi, Tarun J. Edwin, Thomas Kirchhoff, Walter Gamer, Wolfgang Supper
• Inventors: Layne, Richard, Koch, Guido, Edwin, Tarun J., Supper, Wolfgang, Lombardi, Sylvie, Gamer, Walter, Kirchhoff, Thomas
• Granted Patent: US 7,083,640 B2
• Time in Patent Office: Days
• US Class Current: 623/1.44
• CPC Class Codes: A61F 2/07 Stent-grafts
• CPC Class Codes: A61F 2/848 having means for fixation to the vessel wall, e.g. barbs
• 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 2/915 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 2002/075 the stent being loosely attached to the graft material, e.g. by stitching
• CPC Class Codes: A61F 2230/005 Rosette-shaped, e.g. star-shaped
• CPC Class Codes: A61F 2230/0054 V-shaped
• CPC Class Codes: A61L 31/048 obtained by reactions only involving carbon-to-carbon unsaturated bonds A61L31/041 takes precedence
• CPC Class Codes: C08L 27/18 Homopolymers or copolymers or tetrafluoroethene

Abstract

A flexible covered stent having a stent covered on a first surface by a first layer of biocompatible material and on a second surface by both a second and third layer of biocompatible material, the first and second layers and the first and third layers of biocompatible material being bonded to one another through openings in a wall in the stent. The first layer of biocompatible material is longer than both the second and third layers of biocompatible material such that at least a portion of the second surface of the stent is not covered by either second or third layer, imparting flexibility to the stent.

Claims

1. A flexible covered stent, comprising:

a stent having a wall defining a luminal surface and an abluminal surface;

a first tubular layer of expanded polytetrafluoroethylene, substantially covering said abluminal surface of said stent;

a second tubular layer of expanded polytetrafluoroethylene having a length less than a length of said first tubular layer and covering a first region of said luminal surface of said stent, wherein said second layer is bonded to said first layer through openings in said wall of said stent; and

a third tubular layer of expanded polytetrafluoroethylene, having a length less than a length of said first tubular layer and covering a second region of said luminal surface of said stent, wherein said third layer is bonded to said first layer through openings in said wall of said stent;

wherein a third region of said luminal surface of said stent is located between said first and second regions of said luminal surface of said stent, said third region not being covered by either said second or said third tubular layer.

2. The flexible covered stent according to claim 1, wherein said length of said first layer is less than the longitudinal length of said stent such that a first and second extremity of said stent are not covered by said first tubular layer, wherein said uncovered extremities flare outward with respect to a longitudinal axis of the flexible covered stent upon expansion thereof.