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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 ,提示耳鸣发病机制的多样性
Objective To explore the auditory system function of tinnitus patients by using otoacoustic emission technique. Methods Twenty - four patients (24 ears) with unilateral tinnitus (including 8 cases with no hearing loss in tinnitus, 10 cases with tinnitus and high frequency hearing loss, 6 cases with tinnitus and low frequency hearing loss) were treated with ILO - 92 otoacoustic Launch the test system to observe the effects of contralateral acoustic stimulation on otoacoustic emissions. Results ① The detection rate of spontaneous otoacoustic emission (SOAE) was 47.7% in healthy ears and 37.5%, 20% and 33.3% respectively in the tinnitus side of the three groups. ② The main effect of SOE contralateral stimulation was The amplitude of TEOAE was 2. 1 ± 0. 8dBSPL in healthy side, and the TEOAE in 16 ears was 1.9 ± 0. 8dBSPL in 24 ears. The TEOAE in 8 ears was not Suppression, hearing and tinnitus match vary. ③ In 8 cases of normal hearing tinnitus, the DPOAE of 3 ears disturbs the obvious side effects, and the other 5 ears of DPOAE respond normally. The contralateral acoustic contractile effect of 2 ears decreases. 10 cases of high-frequency hearing loss tinnitus ear, 8 ears contralateral contralateral sound, while the other 2 ears reduce the same time the sound attenuation test was positive. In 6 cases of tinnitus with low-frequency hearing loss, contralateral acoustic suppression was observed in only 2 ears. Conclusion Contralateral acoustic suppression in healthy ears is consistent with that in normal human ears, but the results of tinnitus and ear are different, suggesting that the pathogenesis of tinnitus is diverse