摘要
目的 了解颌面部撞击伤合并视网膜、视神经及颅脑伤的损伤特点 ,探讨颌面部撞击伤邻近器官损伤的发生机制 .方法 采用水平气动式撞击机分别以 (4.77± 0 .5 3) m· s- 1(A组 ) ,(9.16± 0 .6 5 ) m· s- 1 (B组 )和 (13.95± 0 .6 7) m·s- 1 (C组 )的不同速度对兔左侧面中部进行撞击 (n=6 ) .观察致伤后动物的生命体征的变化 ,并对颌面部软组织、眼、脑等邻近组织进行损伤的大体和光、电镜观察 ,同时记录致伤瞬间脑内压力和头颅冲击加速度 .结果 形态学改变低速和中速致伤组 (A和 B组 )主要以局部损伤为主 ,高速致伤组 (C组 )则同时合并颅脑损伤和眼损伤 .加速度、颅内压峰值 C组均明显高于 A,B两组 (P<0 .0 5 ) .结论 致伤瞬间头颅冲击加速度响应和脑内压力变化是造成颌面部撞击伤合并邻近器官损伤的重要生物力学因素 .
AIM To study the mechanism of adjacent apparatus injury of maxillofacial impact. METHODS 18 rabbits were subjected to left middle face impact with different impact velocities at 4.77±0.53 m·s -1 (group A), 9.16±0.65 m·s -1 (group B)and 13.95±0.67 m·s -1 (group C). The head acceleration and encephalic stress during the impact periodwere monitored. The pathological characteristics of adjacent tissues at 6 hours after the impact was examined in detail. RESULTS The animals of Groups A, B and C respectively represented single fracture, multiple fractures and severe maxillofacial injury associated with brain and eye injury. The peak values of head acceleration and encephalic stress of group C were both higher than that of Group A and Group B. CONCLUSION The reactions of head acceleration and encephalic stress during the impact are important biomechanical factors that can result in adjacent apparatus injury of maxillofacial impact.
出处
《第四军医大学学报》
2000年第8期918-920,共3页
Journal of the Fourth Military Medical University
基金
国家自然科学基金!资助项目 ( 3 970 0 163 )
