高刺激率听性脑干反应诊断椎基底动脉短暂缺血性眩晕的临床应用

Study on the clinical application of auditory brainstem response with high stimulus rates in patients suffering from vertebro-basilar transient ischemic vertigo

应用高刺激率ＡＢＲ对椎基底动脉短暂缺血性眩晕病例进行测试，其中：①不同发病时间组５１例；②同一患者发作期和缓解期动态观察组２７例；③发作期组２５例缓解期组２９例。测试结果表明：①不同发病时间组波Ｖ潜伏期及波Ｉ－Ｖ间期异常率以１～７天者最高，随着发病时间的加长而减小；②同一病人波Ｖ潜伏期及波Ｉ－Ｖ间期发作期明显长于缓解期；③发作期组波Ｖ潜伏期及波Ｉ－Ｖ间期也明显长于缓解期组。说明本测试法不仅可敏感地发现椎基底动脉系缺血所致的损害，且可观察缺血状态的动态变化，脑干缺血程度与发病时间有相关性，是一种可靠而敏感的测试方法。

Abstract Auditory brainstem response with high stimulus rates was used to study patients suffering from vertebro-basilar transient ischemic vertigo. The patients were divided into the following groups:(1)51 cases at different duration after an ischemic event,(2)27 cases at episodic period and silent period in the same patient,(3)25 cases at episodic and 29 cases at silent period.The measured results showed that:(1incidence of abnormality of wave V latency and wave I-V interwave latency greater in 1～7 days’group,(2)the wave V latency difference and interwave latency difference were prolonged in the episodic period than in the silent period of the same patient,(3)the comparision between the latency shift of the episodic group and the silent group revealed a significant prolonged in episodic group.Our results sugggest that ABR with high stimulus rate may not on ly be used as a sensitive and dependable diagnostic method for the detection of vertebro-basilar transient ischemic vertigo,but also as an observation of dynamic change in the state of ischemia.