脑干听觉诱发电位和经颅多普勒检测对后循环缺血患者的诊断价值

Brainstem auditory evoked potential and transcranial Doppler in the determination of posterior circulation ischemia

目的探讨脑干听觉诱发电位(BAEP)、经颅多普勒超声(TCD)检查对后循环缺血(PCI)患者的诊断价值。方法对100例诊断为PCI的患者进行BAEP和TCD检查,并选择50例正常对照组进行BAEP检查。结果 BAEP异常率为62%,且与正常对照组差异有统计学意义,其中内耳型5例,脑干型49例,混合型8例。TCD异常率为81%,主要表现为椎基底动脉系统血流速度异常和血流频谱、声频及阻力指数的改变。结论两种检查均为非创伤性检查,对PCI的诊断相互补充,可提高其早期诊断率,并有助于定位诊断。

Objective To study the diagnostic values of brainstem auditory evoked potential（BAEP） and transcranial Doppler（TCD） in the determination of posterior circulation ischemia（PCI）.Methods BAEP and TCD were analyzed in 100 cases with PCI.BAEP was analyzed in 50 cases with health.Results The abnormality of BAEP was detected in 62 cases（62%）.There were significant differences between PCI and health.Three types of abnormality were classified according to their characteristics.The abnormality in brainstem type（49%） was the highest.The abnormality of TCD was detected in 81 cases（81%）.The main abnormality of TCD included decreased or increased flow velocity of vertebral-based artery,abnormal spectrum and increase of pusal index（PI）.Conclusion BAEP and TCD may be ideal and non-invasive means to diagnose and locate PCI early.