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目的：探讨老年人脑外伤后慢性硬膜下积液与CT随访价值。方法回顾性分析我院2009年1月~2013年1月1235例老年颅脑外伤患者的头颅CT表现，对老年人脑外伤后慢性硬膜下积液的发病情况与CT随访结果进行总结。结果经1~2年随访，检出慢性硬膜下积液87例，发病率为7.04%。发生于单侧或双侧颞顶部45例，占51.7%，其他部位占48.3%。出现硬膜下积液的时间：3个月内48例，占55.2%；3~6个月21例，占24.1%；6~12个月13例，占14.9%；12个月以上5例，占5.7%。172例存在颅骨与颅内损伤患者中，发生慢性硬膜下积液48例，占27.9%。9例在后期演变为慢性硬膜下血肿，占10.3%。结论因其解剖与生理的特殊性，老年人脑外伤后容易发生慢性硬膜下积液，并有可能演变为慢性硬膜下血肿，后期CT随访观察具有重要的临床意义。“,”Objective To investigate the elderly chronic subdural effusion after traumatic brain injury and follow-up CT value. Methods A retrospective analysis of our hospital from January 2009 to January 2009, 1235 cases of elderly patients with craniocerebral trauma of skull CT performance, for the elderly the onset of chronic subdural effusion after traumatic brain injury with CT follow-up results were summarized in this paper. Results After 1~2 years follow-up, check out the 87 cases of chronic subdural effusion, incidence of 7.04%. In unilateral or bilateral temporal top 45 cases, accounted for 51.7%, other parts accounted for 48.3%. Subdural effusion time:48 cases within 3 months, 55.2%;3~6 months, 21 cases (24.1%);13 cases of 6~12 months, 14.9%;More than 12 months in 5 cases, accounting for 5.7%. In patients with skull and intracranial lesions in 172 cases, 48 cases of chronic subdural effusion, accounting for 27.9%.9 cases in the later evolution for chronic subdural hematoma, accounting for 10.3%. Conclusion Because of the particularity of its anatomy and physiology, the elderly are prone to chronic subdural effusion after brain trauma, and is likely to evolve into chronic subdural hematoma, and late CT follow-up has important clinical significance.