摘要
目的 利用耳声发射技术探讨耳鸣患者听觉传出系统功能。方法 对 2 4名 (2 4耳 )单侧耳鸣患者(其中耳鸣无听力下降者 8例 ,耳鸣伴高频听力下降者 10例 ,耳鸣伴低频听力下降者 6例 ) ,使用ILO - 92耳声发射测试系统 ,观察对侧声刺激对耳声发射的影响。结果 ①健康耳自发性耳声发射 (SOAE)检出率为 4 1.7% ,耳鸣侧三组SOAE检出率分别为 37.5 %、2 0 %、33.3% ;②SOAE受对侧刺激声影响主要表现为幅值改变 ,健康侧瞬态诱发耳声发射 (TEOAE)抑制幅度为 2 .1± 0 .8dBSPL ;2 4耳耳鸣耳中 ,16耳TEOAE抑制幅度为 1.9± 0 .8dBSPL ,8耳TEOAE不被抑制 ,听力和耳鸣匹配情况各异。③ 8例听力正常耳鸣耳中 ,3耳畸变产物耳声发射 (DPOAE)对侧声抑制效应明显 ,另 5耳DPOAE反应正常 ,其中 2耳对侧声抑制效应下降。 10例高频听力下降耳鸣耳中 ,8耳受对侧声抑制 ,另 2耳抑制幅度减低同时声衰减试验阳性。 6例低频听力下降的耳鸣耳中仅有 2耳出现对侧声抑制效应。结论 健康耳的对侧声抑制效应与正常人耳一致 ,但耳鸣耳的结果不同 。
Objective To explore the function of auditory efferent system in the subjects with tinnitus.Methods Effects of contralateral stimulation on otoacoustic emission in 24 subjects with tinnitus were measured for analysis the function of the medial olivo-cochlea system. Results ①The incidence of SOAE 41.7% in 24 normal ears,and 37.5%,20%,33.3% in different groups of tinnitus and the amplitude were suppressed. ②The suppressive amplitude of TEOAE was 2.1±0.8 dB SPL in 24 normal ears and 1.9±0.8 dB SPL in 16 ears with tinnitus, but there was no suppression in 8 ears with tinnitus. ③There were observable suppression in 3 ears, but 2 ears had no contralateral suppression in tinnitus with normal hearing group. 8 ears showed suppression in tinnitus with hearing loss, 2 ears had no changes. 4 ears had no contralateral suppression in tinnitus subjects with low frequency hearing loss.Conclusion The effects of suppression in the normal ears of subjects with tinnitus is as normal subjects, but those different results of suppression in the tinnitus ears indicate that mechanism of tinnitus is multiformity.
出处
《听力学及言语疾病杂志》
CAS
CSCD
2004年第6期363-365,共3页
Journal of Audiology and Speech Pathology
