牵拉性撕脱伤对动脉闭塞率的影响

目的：研究在牵拉性撕脱损伤时动脉内膜的变化及其闭塞率。方法：建立大白鼠动脉牵拉性撕脱伤模型，给予６０～１４０ｇ牵拉力，观察其内膜形态变化。结果：随牵拉力的增加，闭塞率逐渐增大，至１４０ｇ时达到１００％。形态观察可分为：①内膜断裂型；②内膜瓣状型二个类型。牵拉损伤的动脉切断后原位显微吻合的成功率为８３．３３％。结论：损伤动脉有特征性的内膜变化，瓣状型内膜损伤的动脉切断后原位显微吻合的成功率为８３．３

THE EFFECT OF DISTRACTION AVULSION INJURY ON ARTERIAL OCCLUSION RATE

Objective:To investigate the morphological changes and occlusion rate of post avulsion injury artery Methods:Rat model for arterial avulsion injury was developed Distraction force of 60 140g was applied separately The morphological changes of arterial endometrium were observed Result:With the increasing of distraction forec,the occlusion rate was increased accordingly When the distraction force increased up to 140g,the occlusion rate was 100% The morphological changes could be divided into 2 main types:1 Endometrium rupture and 2 Endometrium valve formation The injured artery was divided and anastomosed in situ,the patency rate was 83 33% Conclusion:There were typical endometrium changes after artery injury Endometium valve formation leaded to thrombosis and further compromised the success of microsurgery