脑干听觉诱发电位检查在后循环缺血诊断中的应用

目的探讨脑干听觉诱发电位（BAEP）检查在后循环缺血（PCI）患者中的应用价值。方法回顾分析驻马店市中心医院脑电图室2008～2012年PCI患者96例（PCI组）的BAEP检查结果,并与同期80例健康对照组进行对比。结果 PCI组患者Ⅰ、Ⅲ、Ⅴ波的平均潜伏期（PL）分别为（1.80±0.22）、（3.92±0.29）、（6.12±0.26）ms,Ⅰ～Ⅲ和Ⅲ～Ⅴ波平均峰间潜伏期（IPL）分别为（2.16±0.39）ms和（2.23±0.21）ms;健康对照组Ⅰ、Ⅲ、Ⅴ波平均PL分别为（1.75±0.20）、（3.79±0.25）、（5.98±0.23）ms,Ⅰ～Ⅲ和Ⅲ～Ⅴ波平均IPL分别为（2.19±0.30）ms和（1.67±0.19）ms。PCI组患者Ⅲ、Ⅴ波PL和Ⅲ～Ⅴ波IPL长于健康对照组,差异有统计学意义（P〈0.05）。PCI组Ⅲ、Ⅴ波PL和Ⅲ～Ⅴ波IPL大于健康对照组2.5个标准差;PCI组患者中,BAEP异常84例,异常率为87.5%,主要异常表现为Ⅲ、Ⅴ波PL和Ⅲ～Ⅴ波IPL延长,（Ⅲ～Ⅴ）/（Ⅰ～Ⅲ）的IPL比值〉1,表现以脑干型为主（45/96,46.8%）,高于内耳型（20/96,20.8%）和混合型（31/96,32.2%）。结论 BAEP检查能灵敏地检测出PCI患者的神经电生理异常,可对PCI的诊断提供重要的参考。

Application value of the brainstem auditory evoked potential in diagnosing posterior circulation ischemia

Objective To explore the application value of the brainstem auditory evoked potential（BAEP） in diagnosing posterior circulation ischemia（PCI）. Methods BAEP resunlts in 96 PCI patients（PCI group） and 80 normal cases（health control group） were analyzed in Department of Electromyography Laboratory, Zhumadian Central Hospital between 2008 and 2012. Results The PL of Ⅰ, Ⅲ, Ⅴ wave in PCI group were（1.80±0.22）,（3.92±0.29）,（6.12±0.26） ms respectively, the IPL of Ⅰ-Ⅲ and Ⅲ-Ⅴ wave in PCI group were（2.16±0.39） ms and（2.23±0.21） ms respectively.The PL of Ⅰ, Ⅲ, Ⅴ wave in health control group were（1.75±0.20）,（3.79±0.25）,（5.98±0.23） ms respectively, the IPL of Ⅰ-Ⅲ and Ⅲ-Ⅴ wave in health control group were（2.19±0.30） ms and（1.67±0.19） ms respectively. The PL of Ⅲ,Ⅴ wave and IPL of Ⅲ-Ⅴ wave in PCI group were all longer than those in health control group, the differences were statistically significant（P〈0.05）. The PL of Ⅲ, Ⅴ wave and IPL of Ⅲ-Ⅴ wave in PCI group were all 2.5 times longer than those in health control group; 84 cases of abnormity were found in PCI group, the abnormal rate was87.5%; the main abnormal performance were the extension of PL of Ⅲ, Ⅴ wave and IPL of Ⅲ-Ⅴ wave, the IPL rate of（Ⅲ-Ⅴ）/（Ⅰ-Ⅲ） 1; the brainstem type was the main performance（45/96, 46.8%）, it was higher than the inner ear type（20/96, 20.8%） and mixed type（31/96, 32.2%）. Conclusion BAEP can detect the nerve electrophysiological abnormalities in PCI sensitively, and this method can provide important reference for PCI diagnosis.