[Dacron grafts transplanted to abdominal aorta of dogs in different stages: histomorphological study].

After dacron vessel transplantation in 10 dogs, we analysed the middle-bore Chinese dacron grafts transplanted to the abdominal aorta of dogs and observed histomorphologically changes of the grafts in different stages within 12 weeks. 2cm-long dacron artificial vessel transplantation to the abdominal aorta took 4 weeks for the new endothelial membrane, which mainly comes from the proliferation of the contiguous arterial endothelial smooth muscle fibers, to cover the inner wall of the grafts. More time was needed for endothelial cells than the self vessels to cover the dacron grafts the dacron grafts endothelial membrane was not intact and stable in 7 weeks after operation. The autoclaving dacron grafts should not be used repeatedly.