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目的 :建立颌面部破冲复合伤模型 ,并初步研究颌面部爆炸伤的特点。方法 :采用雷管作爆炸源 ,滑膛枪发射钢珠模拟破片 ,同步测速及测压系统检测致伤参数 ,建立致伤模型。整个致伤模型为一同步控制系统 ,由破片发射触发。由破片对犬颌面部致伤 ,雷管悬于弹着点上方 ,爆距设计为 5、10、15cm。记录致伤参数 (撞击速度、能量吸收、体表压力 ) ,观察动物伤情。结果 :该模型能稳定地模拟犬颌面部的爆炸伤 ,爆炸冲击波压力随爆距减小而急剧升高。犬颌面部伤情严重。损伤范围广 ,并有心、肺、脑等脏器的损伤 ,损伤程度随能量吸收与冲击波压力的升高而加重。结论 :该破冲复合伤模型能较真实地模拟爆炸伤的致伤效果 ,可用于颌面部爆炸伤的基础理论及临床救治研究。颌面部爆炸伤具有伤情重、致伤因素复杂的特点
OBJECTIVE: To establish a model of maxillofacial blasting combined with injury and preliminary study of the characteristics of maxillofacial explosive injury. Methods: The detonator was used as the explosive source, the steel ball simulating fragment launched by the musket was used to measure the injury parameters and the injury model was established. The entire injury model for a synchronous control system, triggered by the fragment launch. Fragment of the dog maxillofacial injury, detonator hanging at the top of the bomb point, the design of the burst distance of 5,10,15 cm. Record injury parameters (impact speed, energy absorption, body surface pressure), observation of animal injuries. Results: The model can stably simulate the explosive injury of maxillofacial region of dogs. The pressure of blast shock wave increases sharply with the decrease of the burst distance. Dog maxillofacial injury. Damage a wide range, and heart, lung, brain and other organ damage, the degree of injury with energy absorption and shock wave pressure increased. Conclusion: The rupture combined injury model can more accurately simulate the injury effect of blast injury, which can be used in the basic theory and clinical treatment of maxillofacial explosive injury. Maxillofacial explosive injury with heavy injury, injury characteristics of complex