脑电图对散发性病毒性脑炎的早期诊断价值

目的研究脑电图对于急性散发性病毒性脑炎的早期诊断价值。方法在入院24小时内对临床拟诊为急性病毒性脑炎的病人进行脑电图（EEG）、头颅CT、MRI、腰穿脑脊液检查。其中53例确诊为急性病毒性脑炎,分析病人头颅CT、MRI、脑脊液及中至重度异常脑电图阳性的几率,进行比较,并随访脑电图。结果头颅CT异常率为22.64%（12/53）,头颅MRI异常率为37.74%（20/53）,脑脊液检查异常率为50.94%（27/53）,EEG中至重度异常率为71.70%（38/53）。经配对χ^2检验比较EEG、头颅影像学检查及脑脊液检查有显著差异（P〈0.05）。结论脑电图对急性病毒性脑炎的早期诊断有重要价值。其早期诊断病毒性脑炎较头颅影像学及脑脊液检查有更高的敏感性。

The early diagnostic value of electroencephalography in the patients with sporadic viral encephalopathy

Objective To investigate the early diagnosis value of ambulatory electroencephagraphy（EEG） in the patients with sporadic viral encephalitis. Methods Patients paradiagnosised with viral encephalitis underwent EEG,computed tomography（CT）,magnetic resonance imaging（MRI） and Cerebrospinal fluid（CSF） in 24 hours after hospitalization,and 53 cases were finally diagnosed with sporadic viral encephalitis.The rate of abnormal findings in CT,MRI,CSF and moderate or severe abnormal EEG was analyzed.Results The rate of abnormal CT,MRI and CSF was 22.64%（12/53）,37.73%（20/53）,50.94%（27/53） respectively.Moderately or gravely abnormal findings observed in EEG were 71.10%（38/53）.Matched-pairs analysis was used to compare the rate and significant difference（P〈0.05）was found.Conclusions EEG shows important value in early auxiliary diagnosis of viral encephalitis and high sensitivity in diagnosis of viral encephalitis Vs MR,CT and CSF.