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目的：为了及早诊治外伤性颅内迟发性病变，探索ＣＴ复查的合适时间。材料与方法：搜集颅脑外伤后ＣＴ复查时发现新病变的ＣＴ资料１３１例，统计分析颅内的新病变和发现新病变的时间。结果：发现颅内迟发性病变２０１个，常见的病变有颅内血肿，脑挫裂伤和硬膜下积液等。接近半数的病变在伤后３天内出现，１０天内发现的病变占８４％。结论：颅脑外伤后３、６、１０天是ＣＴ复查的最佳时机，伤后１０天内积极复查ＣＴ能及早发现颅内迟发性病变
Objective: In order to early diagnosis and treatment of traumatic delayed intracranial lesions and explore the appropriate time for CT review. MATERIALS AND METHODS: 131 cases of new CT findings were retrospectively reviewed after CT scan of craniocerebral trauma. Statistical analysis was made on the new intracranial lesions and the timing of new lesions. Results: Totally 201 delayed intracranial lesions were found. Common lesions were intracranial hematoma, cerebral contusion and subdural effusion. Nearly half of the lesions occurred within 3 days after injury and 84% of the lesions were found within 10 days. Conclusion: The most suitable time for CT examination is 3, 6 and 10 days after traumatic brain injury. Positive CT can detect early delayed intracranial lesions within 10 days after injury