桥小脑角区肿瘤患者的脑干听觉诱发电位研究

目的：探讨脑干听觉诱发电位（BAEP）在桥小脑角区肿瘤（CPAT）诊断及鉴别诊断中的应用价值。方法：对经手术和病理证实的资料完整的CPAT患者24例行BAEP检查。结果：24例患者中听力异常18例（75％），其中听神经鞘瘤16例（100％）异常，脑膜瘤3例中2例（67％）异常；5例胆脂瘤患者均无听力改变。BAEP异常21例（88％），主要为患侧Ⅰ、Ⅲ、Ⅴ波消失（67％），患侧Ⅰ、Ⅲ、Ⅴ波潜伏期（PL）延长（57％），对侧Ⅲ-Ⅴ波间期（IPL）大于Ⅰ-ⅢIPL（76％）。异常者中，听神经鞘瘤16例（100％）异常，胆脂瘤5例中2例（40％）异常，脑膜瘤3例中2例（67％）异常。结论：BAEP是一种敏感的检测方法，在CPAT的诊断及鉴别诊断中具有重要价值。

Study of braistem auditory evoked potential in patients with cerebeilopontine angle tumor

Objective：To explore the value of braistem auditory evoked potential （BAEP）findings in patients with cerebellopontine angle tumor. Methods： Twenty-four patients with complete clinical data verified by operation and pathology were analyzed by BAEP. Results：The threshold of Wave V was higher in 18 Patients （75%）：The abnormaiity rate of Wave V threshold was 100% in the patients with acoustic neuremas,67 % in the patients with meningiomas, no abnormality in the patients with hemangioblastomas. The abnormality rate of BAEP was 88% （21/24） , mainly showing disapperarance of ware Ⅰ,Ⅲ,Ⅴ （67%）, prolongation of PL of Wave Ⅰ,Ⅲ and Ⅴ （57%）, as well as prolongation of IPL of Wave Ⅲ,Ⅴ on the laterality without tumor（76 % ）. The abnormality rate of BAEP was 100 % in the patients with acoustic neuremas, 40 % in the patients with hemangioblastomas, and 67% in the patients with meningiomas respectively. Conclusion： BAEP might be very sensitive, and be of great significance in the diagnosis and differential diagnosis of the cerebellopontine angle tumor.