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目的 探讨外伤性迟发性硬膜外血肿(DEDH) 的发病规律、诊断及治疗.方法 经CT监测及临床观察确诊84例DEDH, 分析迟发性血肿与原发损伤的关系及治疗资料.结果 经2 次CT检查发现迟发性血肿70 例,经3 次CT检查确诊14 例;迟发性血肿多发生于伤后24 小时内(64－3％ ) ,多见于颞顶部(59－5 ％) ,且多有颅骨骨折(76－2％ ) .下述情况的GOSⅣ~Ⅴ级者占比例最高,其中额颞部血肿(18/20) ,GCS13 ~15 分(53/53),血肿量50 ML以下(55/55) ,手术清除血肿(45/54) ,提示具有这些情况的患者预后较好.结论 CT和颅内压(ICP) 监测有助于及时发现DEDH 和确定正确治疗方案,对部分小血肿病人可行保守治疗.“,”Objective To explore the mechanism, diagnosis and treament of delayed onset of traumatic extradural hematoma (DEDH).Methods We analysed the relationship between DEDH and primary head injury and the treatment datum of 84 cases of DEDH defined by computed tomography (CT) monitoring, intracranial pressure (ICP) monitoring and clinical observation. Results 70 cases DEDH were found by preforming CT twice and 14 cases by performing CT 3 times. Most DEDE occured within 24 hours after injury (64.3%). Most of them, the lesion were located in temporal parietal lobe (59.5%) and the majority had skull fracture (76.2%). The proportions of GOS Ⅳ Ⅴ were higher in following condition:hematoma in frontal temporal lobe (18/20), GCS 13~15(53/53), the amount of hematoma <50 mL (55/55) and hematoma cleared away by operation (45/54), which suggest that prognosis may be rather well in the patients with above condition. Conclusions CT and ICP monitoring were helpful to early finding DEDH and defining the correct diagnosis and therapy.Some patients with small hematoma can be managed by conservative treatment.