Synthetic vascular graft and method for manufacturing the same

• US 3,945,052 A
• Filed: 01/21/1974
• Issued: 03/23/1976
• Est. Priority Date: 05/01/1972
• Status: Expired due to Term

• Current Assignee: Lifeshield Sciences LLC (Acacia Research Corporation)
• Original Assignee: Meadox Medicals, Inc. (Boston Scientific Corporation)
• Inventors: Liebig, William J.
• Primary Examiner(s): Yasko, John D.
• Application Number:
  US05/435,131
• Time in Patent Office: 792 Days
• Field of Search: 3/1, 128/334, 66/195, 66/177, 66/169, 66/86
• US Class Current: 623/1.5
• CPC Class Codes: A61F 2/06 Blood vessels
• CPC Class Codes: A61F 2002/065 Y-shaped blood vessels
• CPC Class Codes: A61L 27/18 obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
• CPC Class Codes: C08L 67/00 Compositions of polyesters obtained by reactions forming a carboxylic ester link in the main chain of polyester-amides C08L77/12; of polyester-imides C08L79/08; Compositions of derivatives of such polymers
• CPC Class Codes: D04B 21/16 incorporating synthetic threads
• CPC Class Codes: D10B 2509/06 Vascular grafts; stents

Abstract

A synthetic vascular graft composed of fine denier polyester fiber forming a warp-knitted tube. The vascular graft has a porosity sufficient for optimum tissue ingrowth characteristics while at the same time retaining sufficient control of porosity to prevent hemorrhage at the time of implantation. The tubular vascular graft is knitted on a double needle bar warpknitting Raschel machine preferably with a tricot stitch and with the knitted structure having on the order of a 56 gauge.

Claims

1. A warp knit, non-ravelling tubular structure suitable for forming into a synthetic vascular graft, said tubular structure being of fine denier polyester fiber in 56 gauge two-ply locknit construction, and having longitudinally extending ribs on the interior thereof, said structure being such that when converted into a synthetic vascular graft by known means, the porosity will be sufficient for optimum ingrowth of tissue while preventing hemorrhage when said synthetic vascular graft is implanted.

2. A warp knit, non-ravelling tubular structure suitable for forming into a synthetic vascular graft, said tubular structure being of fine denier polyester fiber in 56 gauge two-ply tricot construction, and having longitudinally extending ribs on the interior thereof, said structure being such that when converted into a synthetic vascular graft by known means, the porosity will be sufficient for optimum ingrowth of tissue while preventing hemorrhage when said synthetic vascular graft is implanted.