纤维基组织工程心脏瓣膜支架研究进展

心脏瓣膜损坏或缺陷所导致的疾病已成为危害人类健康的主要疾病之一.由纤维材料成型技术制备的组织工程支架具有良好的可设计性和较好的力学和生物性能,逐渐成为组织工程心脏瓣膜支架的主要制备方法.全文重点介绍了纤维基组织工程心脏瓣膜支架的研究进展,对采用针织、非织造以及静电纺丝制备技术得到的微纳米纤维基支架的各自特点进行了对比分析,由此表明具有优良生物相容性和可控力学性能的三维多孔纳米纤维基支架将是组织工程心脏瓣膜支架的发展方向.     

Effect of PLA Knitted Structure on the Mechanical Properties of Composite Vascular Scaffold

A new entire biodegradable scaffold has been developed which does not require precelluiarization before transplantation. This new kind of vascular scaffold prototype made from porous poly- e-caprolactone （PCL） membrane to provide three-dimensional environment for cell growth, and embedded with weft-knitted polylactic acid （PLA） fabric to support mechanics. The aim of this paper is to study the variation tendency of mechanical properties with the fabric spacing changing. The basic geometrical parameters were measured to characterize properties of the samples. The tensile and compressive elastic recovery of the samples were tested by the universal mechanical tester and radial compression apparatus, respectively. Both tensile and compressive properties enhanced when reducing the fabric spacing of the composite vascular scaffold.