作者分析了56例听神经瘤患者的脑干听觉诱发电位(以下简称诱发电位),探讨了异常诱发电位与肿瘤大小间的关系.本组男36例,女20例.右侧肿瘤29例,左侧27例.内听道内肿瘤10例,内听道外肿瘤46例.所用刺激为100微秒的咔哒声,频率为10.1Hz,音量高于听域60dB.对两耳分别进行刺激,非刺激侧用50dB的噪声掩盖.于MR或CT片上测量肿瘤最大直径、后颅凹直径及双侧内听道间距. The authors analyzed the brainstem auditory evoked potentials (hereinafter referred to as evoked potentials) in 56 patients with acoustic neuroma and explored the relationship between abnormal evoked potentials and tumor size.There were 36 males and 20 females.The right tumors in 29 patients, left Side in 27 cases. 10 cases of intra-canal tumor, 46 cases of intra-and extra-ductal tumor. The stimulus was 100 microsecond click, the frequency was 10.1Hz, the volume was higher than the listening range 60dB. The two ears were stimulated, non-stimulated side Mask with 50 dB of noise.Maximum diameter of tumor, posterior foveal diameter, and bilateral interlobular pitch were measured on MR or CT slices.