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颅神经损害是后颅凹手术常见并发症,听神经瘤切除后听力丧失率达50%～100%,微血管减压术中脑干诱发电位(BAEP)监护降低了听力丧失的危险性。作者研究BAEP 对听神经瘤手术病人听力保存率的作用,了解术中BAEP 变化同术后听力状况的相关性。对1986～1991年90例监护病人,对照组为过去未接受过监护的90例在年龄、术前听力状况和肿瘤大小方面进行了研究。听力由术前和术后3月纯音听力测听法(PTA)和言语辨别计分(SDS)评估,当术后3月后PTA 阈值达65dB 时则
Cranial nerve damage is a common complication of posterior fossa surgery. The hearing loss rate after acoustic neuroma resection is 50% ~ 100%. The brainstem evoked potential (BAEP) monitoring during microvascular decompression reduces the risk of hearing loss. The authors studied the effect of BAEP on the hearing preservation rate of patients with acoustic neuroma surgery and the correlation between BAEP changes and postoperative hearing status. Of 90 patients in custody between 1986 and 1991, the control group consisted of 90 previously unwed patients in terms of age, preoperative hearing status, and tumor size. Hearing was assessed by preoperative and postoperative March pure tone audiometry (PTA) and speech recognition scores (SDS), when the PTA threshold was 65 dB after 3 months