trapdoor眼眶骨折是一特殊类型的爆裂性眼眶骨折。因儿童骨骼较成人更具弹性,故最常见于儿童。其发病机制、临床表现及治疗原则与成人爆裂性眼眶骨折均有明显区别。临床表现主要为眼球垂直位转动受限伴恶心、呕吐及眼球转动痛等。其眶部CT骨折不明显,常表现为线形骨折,眼外肌被箝闭于骨折处或下直肌走行路径发生变化。儿童trapdoor型眼眶骨折治疗应在确诊后早期手术治疗,避免因眼外肌被箝闭缺血导致永久性眼外肌功能障碍。 Trapdoor orbital fracture is a special type of orbital fracture. Because children’s bones are more flexible than adults, it is most common in children. The pathogenesis, clinical manifestations and principles of treatment and adult burst orbital fractures were significantly different. Clinical manifestations of the main vertical rotation of the eye with limited nausea, vomiting and eye rotation and so on. The orbital CT fractures are not obvious, often manifested as linear fractures, extraocular muscles were closed at the fracture or lower rectus abdominis path changes. Children trapdoor type orbital fracture treatment should be diagnosed early after surgery to avoid extraocular muscle is clipped ischemia resulting in permanent extraocular muscle dysfunction.