聚氨酯由于其优良的机械性能和生物相容性而广泛应用于生物医用材料,如制作人工器官、药物释放载体及人工血管等.但是当它作为体内移植材料使用时会引起机体的炎症反应,并且与血液接触时还会引起持续的凝血和内膜增生.因此,要想将聚氨酯应用于人工血管,就要进一步提高它的生物相容性、血液相容性和细胞相容性等.目前主要是通过对聚氨酯进行本体改性、表面接枝聚合改性、等离子体处理聚氨酯表面、涂覆生物分子及结构设计等方法来提高其在体内使用时的性能.
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