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Circumferential Compliance of Small Diameter Polyurethane Vascular Grafts Reinforced with Elastic Tubular Fabric

Research and development

Authors:

• Yang Hongjun
  College of Fashion, Donghua University, Shanghai, P. R. China
• Xu Weilin
  Hubei Key Laboratory for New Textile Materials and Applications, Wuhan University of Science and Engineering, Wuhan, P. R. China
• Ouyang Chenxi
  Department of Vascular Surgery, Tongji Medical College, Huazhong University of Science & Technology, Wuhan, P. R. China
• Zhou Fei
  Hubei Key Laboratory for New Textile Materials and Applications, Wuhan University of Science and Engineering, Wuhan, P. R. China
• Cui Weigang (j/w)

Full text

Abstract: Small diameter vascular grafts were fabricated from pure Polyurethane (PU), as well as PU reinforced with a weft-knitted tubular fabric. Textured polyester and Spandex blend yarns were used for knitting on a purpose-built weft-knitting machine. The circumferential compliance properties of the reinforced composite vascular grafts were compared with those of the tubular fabric itself and the pure PU vascular grafts. The elasticity and strength of the reinforced vascular grafts were improved in the radius compared with the tubular fabric. The strength of the reinforced vascular grafts was 5 - 10 times that of the pure PU vascular grafts. Expanding the tubular fabric to increase the inner diameter of the reinforced vascular graft increased the graft’s strength and initial modulus, but the difference was reduced as the PU content was increased. For grafts of the same inner diameter, increasing the PU content increased the thickness and strength of the graft wall, which led to a general increase in the strength and initial modulus of the composite vascular grafts. The new composite vascular grafts combine the good elasticity and blood-proof properties of PU with the strength and stability of weft-knitted fabrics.

Tags: polyurethane, tubular fabric, vascular graft, textile composite graft, weft-knitted fabric, circumferential tensile strength

Citation: Yang H., Xu W., Ouyang C., Zhou F., Cui W., Yi C.; Circumferential Compliance of Small Diameter Polyurethane Vascular Grafts Reinforced with Elastic Tubular Fabric. FIBRES & TEXTILES in Eastern Europe 2009, Vol. 17, No. 6 (77) pp. 89-92.

Published in issue no 6 (77) / 2009, pages 89–92.