MethodsTest group: smooth muscle cells were harvested from human umbilical artery,cultured and proliferated in vitro,and then were planted into a vessel made of degraded biomaterial PGA.

• 方法体外培养、扩增的人脐带动脉平滑肌细胞,将其与可降解生物材料聚乙醇酸(PGA)制成的管状结构结合(实验组),体外培养1周后植入裸鼠背部皮下。