Vein grafts were harvested at 1,3 days, 1, 2, 4 and 8 weeks after surgery for examining the patency, thickness of intima media and expression of proliferating cell nuclear antigen (PCNA).

• 于术后 1d、3d、1w、2w、4w及 8w取材 ,观测移植静脉通畅率、内 中膜厚度及细胞核增殖抗原(PCNA)的表达。