为探讨对侧诱发ABRs是否能够提高检测脑干病变的敏感性,本文比较了53例听力正常的多发性硬化(MS)患者的同侧和对侧诱发的ABRs。作者先测定了20名健康年青人的Ⅰ、Ⅲ和Ⅴ波潜伏期及Ⅰ～Ⅲ、Ⅲ～Ⅴ、Ⅰ～Ⅴ峰间期。如果患者的ABRs有一个或更多的波形缺失,或者潜伏期超过正常人的3个标准差,就定为异常。因对侧记录Ⅰ波常不存在,故只能计算出Ⅲ～Ⅴ间期,加以比较。 To investigate whether contralateral evoked ABRs can improve the sensitivity of detecting brain stem lesions, this study compared ileus and contralateral induced ABRs in 53 patients with normal hearing multiple sclerosis (MS). The authors first determined the latency of Ⅰ, Ⅲ and Ⅴ waves and the interphase Ⅰ ~ Ⅲ, Ⅲ ~ Ⅴ, Ⅰ ~ Ⅴ of 20 healthy young people. Abnormalities were identified if the patient had one or more ABRs missing or had an incubation period of more than 3 standard deviations from normal. Because the opposite side of the record Ⅰ wave often does not exist, it can only calculate the Ⅲ ~ Ⅴ interval, to be compared.