Composite vascular graft

• US 6,652,570 B2
• Filed: 07/02/1999
• Issued: 11/25/2003
• Est. Priority Date: 07/02/1999
• Status: Expired due to Term

• Current Assignee: Boston Scientific Scimed (Boston Scientific Corporation)
• Original Assignee: Scimed Life Systems Incorporated (Boston Scientific Corporation)
• Inventors: Brodeur, Christopher Brian, Smith, Scott
• Primary Examiner(s): Thaler, Michael H.
• Application Number:
  US09/347,218
• Publication Number:
  US 20010023370A1
• Time in Patent Office: 1,607 Days
• Field of Search: 606/108, 606/192, 606/194, 606/195, 606/198, 623/1, 623/1.13, 623/1.14, 623/1.32, 623/1.33
• US Class Current: 623/1.13
• CPC Class Codes: A61F 2/07 Stent-grafts
• 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 2/90 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 2220/0058 soldered or brazed or welded
• CPC Class Codes: A61F 2220/0075 sutured, ligatured or stitched, retained or tied with a rope, string, thread, wire or cable

Abstract

A composite stent/graft tubular prosthesis includes an inner PTFE tubular structure, an outer PTFE tubular structure assembled about the inner PTFE tubular structure, and a circumferentially distensible stent interposed between the inner and outer PTFE tubular structures. The outer tubular body is a non-continuous body formed of polytetrafluoroethylene components, providing axial and circumferential compliance to said prosthesis. The outer tubular body completely overlies the distensible stent.

Claims

1. An implantable composite intraluminal prosthesis comprising:

a continuous, uninterrupted polytetrafluoroethylene tubular inner body, having a cross-section which is uniform through out its entire length;

a longitudinally non-continuous outer tubular body; and

an open wall stent applied in direct contact with said inner body and interposed between the inner and outer tubular bodies, said outer tubular body being formed of polytetrafluoroethylene tape segments, having a longitudinal length and a width, said longitudinal length being greater than said width, said segments circumferentially surrounding and completely overlying said stent and bonded to said tubular inner body through said open wall of said stent, whereby axial and circumferential compliance is provided to said prosthesis.

2. A composite intraluminal prosthesis according to claim 1 wherein the outer polytetrafluoroethylene body comprises a polytetrafluoroethylene tape spirally wrapped with a plurality of helical turns in a circumferential direction around the inner tubular body and said stent, wherein each helical turn of said spiral wrap defines one of said polytetrafluoroethylene segments.

3. A composite intraluminal prosthesis according to claim 1 wherein said continuous polytetrafluoroethylene tubular inner body is comprised of a sheet of expanded polytetrafluoroethylene formed into a tubular shape by wrapping said sheet about a longitudinal axis.