185例大前庭水管综合征患者的听力学特点分析

张波;沈芳;李萍;孙敬武;许为青;孙家强;

1:安徽省立医院耳鼻咽喉头颈外科

摘要

目的探讨大前庭水管综合征(large vestibular aqueduct syndrome,LVAS)患者的听力学特点。方法对185例(370耳)LVAS患者进行纯音测听及声导抗、ABR、DPOAE、颞骨高分辨CT、头颅MRI检查,分析其特点。结果 183例(366耳)患者CT检查均提示双侧前庭水管扩大,2例(2耳)提示单侧前庭水管扩大;120例(240耳)行MRI检查,238耳均提示内淋巴囊扩大;112例(224耳)行纯音听阈测试,1例(1耳)听力正常,28例(55耳)为感音神经性聋,85例(168耳)呈混合性聋,其中152耳鼓室导抗图为A型的混合性聋患者,其低频气骨导差较大,中高频气骨导差较小;105例(210耳)行声导抗检测显示鼓室导抗图为A型192耳(其中低频引出声反射7耳),As型1耳,Ad型1耳,B型7耳,C型9耳;176例(352耳)行ABR检测,出现声诱发短潜伏期负反应波(acoustically evoked short latency negative response,ASNR)89例(124耳),占50.6%(89/176),ASNR平均波潜伏期在95dB SPL刺激声强时为3.04±0.29ms,在90dB SPL时为3.12±0.28ms;185例(370耳)DPOAE均未引出。结论 LVAS患者在中耳功能正常时其纯音听阈显示低频气骨导差较大、中高频气骨导差较小的混合性聋,ABR测试可引出特征性的ASNR。

关键词

大前庭水管综合征;气骨导差;短潜伏期负反应波

基金项目(Foundation):

作者

张波;沈芳;李萍;孙敬武;许为青;孙家强;

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