Process of making self-supporting woven vascular graft

• US 5,487,858 A
• Filed: 01/31/1994
• Issued: 01/30/1996
• Est. Priority Date: 08/28/1990
• Status: Expired due to Term

• Current Assignee: Maquet Cardiovascular LLC (Getinge AB)
• Original Assignee: Meadox Medicals, Inc. (Boston Scientific Corporation)
• Inventors: Schmitt, Peter J.
• Primary Examiner(s): Tentoni, Leo B.
• Application Number:
  US08/189,305
• Time in Patent Office: 729 Days
• Field of Search: 264/103, 264/233, 264/234, 264/235, 264/294, 264/342 R, 264/342 RE, 264/344, 264/345, 264/346
• US Class Current: 264/103
• CPC Class Codes: A61F 2/06 Blood vessels
• CPC Class Codes: A61F 2002/065 Y-shaped blood vessels
• CPC Class Codes: D03D 15/283 synthetic polymer-based, e.g. polyamide or polyester fibres cellulose-based artificial fibres D03D15/225
• CPC Class Codes: D03D 15/41 with specific twist
• CPC Class Codes: D03D 15/46 Flat yarns, e.g. tapes or films
• CPC Class Codes: D03D 15/49 textured chenille D03D27/18; curled; crimped
• CPC Class Codes: D03D 15/56 elastic
• CPC Class Codes: D03D 15/573 Tensile strength
• CPC Class Codes: D03D 27/00 Woven pile fabrics
• CPC Class Codes: D03D 3/02 Tubular fabrics
• CPC Class Codes: D10B 2321/042 polymers of fluorinated hydrocarbons, e.g. polytetrafluoroethene [PTFE]
• CPC Class Codes: D10B 2331/04 polyesters, e.g. polyethylene terephthalate [PET]
• CPC Class Codes: D10B 2331/10 polyurethanes
• CPC Class Codes: D10B 2401/041 thermoplastic; thermosetting
• CPC Class Codes: D10B 2401/061 elastic
• CPC Class Codes: D10B 2401/062 stiff, shape retention
• CPC Class Codes: D10B 2509/06 Vascular grafts; stents

Abstract

A woven synthetic fabric tubular vascular graft including, a stiffening component in the filling yarn is self supporting without crimping the walls of the graft. The graft is woven from warp ends of multifilament polyester yarns and elastomeric yarns in the warp and a filling yarn which includes multifilament and monofilament polyester yarns which have been twisted together. Longitudinal and radial compliance provide for improved kink resistance making the tubular grafts suitable for use in medium and small diameter peripheral applications. A preferred graft has an outer velour surface and a smooth inner surface.

Claims

1. A process for preparing a self-supporting woven vascular graft, comprising:

weaving a plurality of warp yarns with a filling yarn including a stiffening component to provide a woven tubular fabric;

scouring said woven tubular fabric; and

heat setting said woven tubular fabric to set said stiffening component in a generally rounded configuration thereby providing radial rigidity with resiliency to said woven tubular fabric without crimping resulting in a self-supporting woven vascular graft.

2. The process of claim 1, including weaving the tubular fabric with warp yarns of elastomeric yarn.

3. The process of claim 1, including weaving the tubular fabric with the stiffening component including a monofilament yarn.

4. The process of claim 1, wherein heat setting is carried out by placing the tubular fabric on a straight mandrel and heating to set the tubular fabric.

5. The process of claim 1, wherein heat setting is carried out by placing the tubular fabric on a curved mandrel and applying heat to set the tubular fabric.

6. The process of claim 1, including weaving the tubular fabric with warp yarns including multifilament yarns.

7. The process of claim 1, including weaving the tubular fabric with the filling yarn including multifilament yarns.

8. The process of claim 1, including weaving the tubular fabric into a bifurcated tube having a main body portion and two branches connected to the main body portion.

9. The process of claim 1, including weaving the tubular fabric with warp yarns including elastomeric yarn.