Elastic properties and strength of a novel small-diameter, compliant polyurethane vascular graft.

K Hayashi, K Takamizawa, T Saito, K Kira, K Hiramatsu, K Kondo
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引用次数: 0

Abstract

Tensile properties and pressure-diameter-axial force relations of a newly developed small-diameter arterial graft were determined and compared to those of commercially available grafts and natural arteries. The material was synthesized from 4,4'-diphenylmethane diisocyanate, polytetramethylene glycol, and polyethylene oxide, chain-extended with ethylene glycol. Porous conduits (3-mm internal diameter) were fabricated of this material by means of a phase separation technique, and their outer surfaces were covered with woolly polyester net in order to prevent excessive dilation. Mechanical tests indicated that the polyurethane graft has distensibility and strength similar to that of natural arteries, and has been proved to be useful for the arterial reconstruction, particularly for the replacement of small-diameter blood vessels.

一种新型小直径柔性聚氨酯血管移植物的弹性性能和强度。
测定了新研制的小直径动脉移植物的拉伸性能和压力-直径-轴向力关系,并将其与市售移植物和天然动脉进行了比较。该材料由4,4′-二苯基甲烷二异氰酸酯、聚四甲基乙二醇和聚环氧乙烷经乙二醇扩链而合成。多孔导管(内径3毫米)通过相分离技术制成,其外表面覆盖羊毛聚酯网,以防止过度膨胀。力学试验表明,聚氨酯移植物具有与天然动脉相似的膨胀性和强度,已被证明可用于动脉重建,特别是小直径血管的替代。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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