法医损伤鉴定常涉及对骨折致伤方式即形成原因的分析。本文报道1例,从生物力学角度系统阐述致伤方式,供同行借鉴。1案例资料李某,男,55岁,某年7月16日因右上臂外伤致疼痛、活动障碍5h入院。查:右上臂下段、右前臂上段肿胀,功能受限,右手各指活动可;X线片示右肱骨远端骨折。诊断为右肱骨远端骨折,行“右肱骨骨折切开复位钢板内固定术”。 Forensic injury identification often involves the analysis of the causes of fracture injury. This article reports a case, from the biomechanical point of view systematically injury way for colleagues to learn from. 1 case data Lee, male, 55 years old, July 16 of a year due to pain in the upper right arm trauma, activity disorders 5h admission. Check: lower right arm, upper right forearm swelling, limited function, the right hand fingers can move; X-ray showed distal right humerus fractures. Diagnosis of the right distal humerus fractures, line “right humeral fracture open reduction plate fixation.”