病毒性脑炎脑电图的辅助诊断意义

The Diagnosestic Value of EEG Monitoring in the Auxiliary Diagnosis for Patients With Viral Encephalitis

目的研究病毒性脑炎脑电图的辅助诊断意义。方法在入院时对临床拟诊为病毒性脑炎病人分别进行脑电图检查,其中有50例确诊为病毒性脑炎,分析病毒性脑炎病人的头颅CT、磁共振(MRI)以及中度或重度异常脑电图的机率,并进行比较。结果头颅CT异常率为16%(8/50),MRI异常率为36%(18/50),中度或重度脑电图的发生率为68%(34/50),采用配对χ2检验,有显著性差异(P<0.005);结论脑电图对病毒性脑炎有重要的辅助诊断意义,相对于头颅CT、MRI等影像学检查有更高的敏感性。轻度度异常脑电图不能排除病毒性脑炎的可能性。

Objective To explore the value of ambulatory electroencephagraphy （AEEG） monitoring in the auxiliary diagnosis of viral encephalitis, Methods Patients paradiagnosised with viral encephalitis underwent EEG, computed tomography （CT） and magnetic resonance imaging （MRI） in 3 days after hospitalization, and 50 patients were finally diagnosed with viral encephalitis, The rate of abnormal findings in CT, MRI and moderate or severe abnormal EEG was analysed, Results The rate of abnormal CT and MRI is 16% （8/50） and 36% （18/50） respectively. Moderately or gravely abnormal findings observed in EEG were 68%（16/48）. Matched-pairs analysis was used to compare the rate and significant difference （P〈0.005） was found. Conclusions EEG shows important value in auxiliary diagnosis of viral encephalitis and high sensitivity in diagnosis of viral encephalitis vs MR and CT. The diagnosis of viral encephalitis can not be excluded only based on mildly abnormal EEG.