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目的：总结重型颅脑外伤标准去大骨瓣减压术后并发对侧慢性硬膜下血肿临床特点及原因。方法：2011年7月至2015年6月我科共收治重型颅脑外伤标准去大骨瓣减压术后并发对侧慢性硬膜下血肿病3例。回顾性分析总结同期46例重型颅脑外伤标准大骨减压术患者病例。结果：重型颅脑外伤都经标准去大骨瓣减压术后，早期并发硬膜下积液占17.5%，而3个月后都并发对侧慢性硬膜下血肿占37.5%。结论：对于重型颅脑外伤开颅清除+去骨术后存在硬膜下积液患者，应考虑存在并发对侧硬膜下血肿可能。“,”Objective To summarize the severe traumatic brain injury criteria to hemicraniectomy postoperative concurrent clinical characteristics and causes of contralateral chronic subdural hematoma .Method From July 2010 to June 2015were admitted with severe brain injury standards to three cases of hemicraniectomy postoperative comtralateral chronic subdural hematoma disease retrospectively analyzed and summarized the cases of patients with the same period 46cases of severe traumatic brain injury standard bone decompression Results Severe traumatic brain injury by the standard to hemicraniectomy after surgery,early comcurrent subdural effusion accounted for 17.5%,while the concurrent contralateral chronic subdural hematoma accounted for 37.5% three months later .Conclusion For severe traumatic brain injury craniotomy clear+boneless postoperative subdural effusion should consider the presence of concurrent contralateral subdural hematoma maybe.