脑干听觉诱发电位对前庭系统性眩晕的临床诊断价值

目的：探讨脑干听觉诱发电位（BAEP）对前庭周围性眩晕和前庭中枢性眩晕的诊断价值。方法：对90例前庭系统性眩晕患者（病例组）及50例健康人（对照组）进行BAEP检测，分别观测和比较各波分化情况，I、Ⅲ、V波潜伏期（PL），I-Ⅲ、Ⅲ-V、I—V波峰间期（IPL），两侧耳间差（ILD），V／I波的波幅比，并进行统计学分析。结果：健康对照组波形分化良好。病例组90例中有67例（74％）BAEP异常，主要表现为波形分化异常，PL、IPL延长，其中周围性眩晕有28例（42％），中枢性眩晕有39例（58％）。正常对照组与病例组I、Ⅲ、V波PL及I-Ⅲ、Ⅲ一V、I—V波的IPL比较，差异均有统计学意义（P〈0．05）。结论：BAEP对前庭周围性眩晕、中枢性眩晕的诊断和鉴别诊断具有重要价值，对临床治疗及预后具有一定的指导意义。

Diagnosing value of branstem auditory evoked potential in patients with vestibular system vertigo

Objective： To explore the diagnostic value of branstem auditory evoked potential（BAEP） in patients with vestibular system （perpheral or eentraD vertigo （VSV）. Methods： The BAEPs were de- tected in 90 patients with VSV and in 50 healthy controls. The peak lateney（PL） of Waves I . Ⅲ . V ,the interpeak latency（IPL） of Waves I -- Ⅲ , Ⅲ - V , I - V , the inter-ears latency difference（ILD）and am- plitude radio of Waves V / I were observed and analized. The results were compared between the two groups. Results：BAEPs of the healthy volunteers showed good waveform and normal PL of Waves I , Ⅲ, V ,IPL of Waves I -Ⅲ , Ⅲ -- V , I -- V. BAEPs showed abnormal wave forms in 67 patients（74 % ）, with prolongation of PL or IPL. Out of 90 patients including 28 cases of inner-ear type and 39 cases of brainstem type. There were significant difference between 50 controls and 90 patients（P〈0.05）. Conclu- sion： BAEP plays an important role for the diagnosis and differential diagnosis of VSV and has remarkble clinical value for evaluating the effect of treatment.