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目的： 评价脑诱发电位（ＥＰ） 诊断亚临床型肝性脑病（ＳＨＥ） 的价值。方法： 对４８ 例肝炎后肝硬化患者进行三种ＥＰ检查， 并追踪１年观察临床肝性脑病（ＨＥ） 出现情况。结果： 三种脑诱发电位总异常２６例（５４％ ），其中听觉诱发电位 （ＢＡＥＰ） 异常１８例 （３８％ ）、视觉诱发电位（ＶＥＰ） 异常３ 例（６％ ）、体感诱发电位 （ＳＥＰ） 异常１０ 例 （２１％ ）， 以ＢＡＥＰ异常率最高。追踪观察１ 年的２９例患者中， １５例ＥＰ异常者出现ＨＥ１１ 例 （７３％ ）， 无ＥＰ异常１４例中， 出现ＨＥ４ 例（２８％ ） （Ｐ＜ ０．０５）。结论： 揭示ＢＡＥＰ对诊断ＳＨＥ最敏感， 同时三种ＥＰ检查可提高ＳＨＥ的检出率， 检测ＳＨＥ有助于预测ＨＥ的发生有临床价值
Objective: To evaluate the value of brain evoked potentials (EP) in the diagnosis of subclinical hepatic encephalopathy (SHE). Methods: Thirty-eight patients with posthepatitic cirrhosis were enrolled in this study. Three kinds of EP were examined and followed up for 1 year to observe the occurrence of clinical hepatic encephalopathy (HE). Results: Totally 26 cases (54%) had abnormal brain evoked potentials (BAEP), 18 cases (38%) had abnormal auditory evoked potentials (BAEP), 3 cases had abnormal visual evoked potential (VEP) ) Abnormalities in 10 cases (21%), the highest rate of abnormal BAEP. Of the 29 patients who followed up for 1 year, HE11 (73%) were found in 15 patients with abnormal EP and 14 patients (28%) were HE without EP (P <0.05). Conclusion: It is revealed that BAEP is the most sensitive for the diagnosis of SHE, and the three EP tests can increase the detection rate of SHE. Detecting SHE is helpful to predict the occurrence of HE.