血管回声追踪技术检测猪肢体肌肉枪弹伤后髂外动脉弹性功能

Study on elasticity of ipsilateral external iliac artery with echo-tracking after gunshot wound in pig limbs

目的探讨超声血管回声追踪（echo—tracking，ET）技术对猪肢体肌肉枪弹伤后伤侧髂外动脉弹性的检测价值。方法应用二维超声及ET技术检测15只猪后肢肌肉枪弹伤后髂外动脉二维显像及弹性参数，并与伤前进行比较。超声检测后将实验动物处死，取髂外动脉行病理学分析。结果肢体枪弹伤后，伤侧髂外动脉超声二维显像无明显改变；动脉弹性参数测值与伤前比较，弹性系数（Ep）、硬化参数（p）值增高，顺应性（AC）降低，差异有统计学意义（P〈0．05）；病理显示检测段动脉内弹力膜平坦、内皮细胞问断脱落、内皮细胞结构不清。结论猪肢体肌肉枪弹伤后，ET技术能够敏感地反映邻近大动脉因间接损伤所致的弹性改变，从而可提示枪弹伤所致血管间接损伤的发生。

Objective To explore the value of echo-tracking technique in the detecting the ipsilateral external lilac artery elasticity after gunshot wound in pig limbs. Methods Two-dimensional ultrasound imagings and elasticity parameters of external iliac artery of fifteen pig limbs were obtained respectively, and the results were compared with pre injury groups. The animals were sacrificed after ultrasonography. Pathological examinations of adjacent external iliae artery of injured pig limbs were analyzed. Results Two- dimensional ultrasound imagings of external iliac arteries had no significant changes post-injury. The changes of elasticity parameters were signifieiant differences in the injured group comparing with the pre-injured group （ P 〈0.05）, including the increased stiffness parameter（p）, pressure-strain elasticity modulus（Ep） and the decreased arterial complianee（AC）. Pathological result showed that the internal elastic lamina of artery detected were flat,endothelial cells came off discontinuously and structure of them were undefined. Conclusions Echo tracking technique can find the elastic changes of adjacent artery indirect injured by gunshot wound sensitively and which can suggest the occurrence of vascular indirect injury.