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目的分析CT平扫对发病24 h内急性大面积脑梗死的阳性率及其影响因素,主要评价早期CT征象的意义。方法收集统计24 h内急性大面积脑梗死患者38例,均有复查片证实。结果38例急性大面积脑梗死患者24 h内CT阴性6例(15.8%),阳性所见有脑实质低密度征、大脑中动脉高密度征、局部脑肿胀,总阳性率为84.2%。结论在熟悉急性脑梗死临床神经解剖和CT定位的基础上,熟悉各早期CT征象,24 h内常规CT对急性大面积脑梗死有较高的准确性,可为临床早期治疗及判断预后提供有用的信息。
Objective To analyze the positive rate and its influencing factors of acute large area cerebral infarction within 24 h after CT scan and mainly evaluate the significance of early CT signs. Methods Collecting statistics of 38 cases of acute large area cerebral infarction within 24 hours, all confirmed by the reviewing film. Results CT was found in 6 cases (15.8%) in 38 cases of acute large area cerebral infarction within 24 h. Positive signs of low density of brain mass, high density of middle cerebral artery and local brain swelling were found. The positive rate was 84.2%. Conclusion On the basis of being familiar with the clinical neuroanatomy and CT location of acute cerebral infarction, it is very important to know all the early CT signs. Conventional CT within 24 hours has a high accuracy in acute large area cerebral infarction and may be useful in early clinical treatment and prognosis Information.