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目的:探讨脑电图对病毒性脑炎早期的诊断价值。方法:应用流行病学方法分析266例拟诊为病脑患儿的临床资料和脑电图,用临床诊断作为金标准,比较分析。同时对EEG,CT,MRI两两配对资料进行分析。结果:脑电图诊断病脑的灵敏度为95.7%,特异度57.6%,误诊率42.4%,漏诊率4.3%,准确度83.2%;阳性预告值95.7%;阴性预告值79.1%.阳性似然比2.26;阴性似然比0.0747;尤登指数值0.576。CT阳性检出率47.3%。MRI阳性检出率94.2%。经统计学处理有显著性差异。结论:脑电图诊断病脑灵敏性高,不易漏诊,适于疾病初查。但是特异性不高,诊断有困难时,争取进行头部平扫或增强MRI检查,联合诊断,可提高病脑诊断的特异性。
Objective: To investigate the value of EEG in the early diagnosis of viral encephalitis. Methods: The epidemiological method was used to analyze the clinical data and electroencephalogram (EEG) of 266 children with suspected brain diseases. The clinical diagnosis was used as the gold standard and comparative analysis was made. At the same time, EEG, CT, MRI pairs of paired data analysis. Results: The sensitivity of EEG was 95.7%, specificity was 57.6%, misdiagnosis rate was 42.4%, misdiagnosis rate was 4.3%, accuracy was 83.2%, positive predictive value was 95.7% and negative predictive value was 79.1%. Positive likelihood ratio 2.26; negative likelihood ratio 0.0747; Youden index value 0.576. The positive rate of CT was 47.3%. The positive rate of MRI was 94.2%. After statistical analysis there are significant differences. Conclusion: EEG diagnosis of brain disease sensitive, difficult to miss, suitable for disease investigation. However, the specificity is not high, the diagnosis is difficult, for head scans or enhanced MRI examination, joint diagnosis, can improve the diagnosis of disease-specific brain.