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提示咽鼓管功能

时间:2022-06-28 百科知识 版权反馈
【摘要】:在外耳道能引出OAE的前提之一是中耳必须完好,所以有作者报道用DPOAE来判断中耳的轻度病变。所有患者接受咽鼓管吹张治疗,自觉症状减轻后复查OAE,发现高频OAE幅值明显改善。因此作者建议对高频OAE改变的患者不应单纯进行感音神经病变的治疗,可以行中耳的、咽鼓管功能等方面的试验性治疗。因此测试OAE时应尽量选择安静的隔声环境。

在外耳道能引出OAE的前提之一是中耳必须完好,所以有作者报道用DPOAE来判断中耳的轻度病变。作者对24耳进行了观察,这些患者主诉为耳闷、耳胀或耳鸣,耳镜下见鼓膜内陷,活动度良好,DPOAE的检测提示4kHz以上(包括4kHz)幅值低于正常,纯音测听正常。鼓室导抗图A型11耳,C型8耳,B型5耳。所有患者接受咽鼓管吹张治疗,自觉症状减轻后复查OAE,发现高频OAE幅值明显改善。因此作者建议对高频OAE改变的患者不应单纯进行感音神经病变的治疗,可以行中耳的、咽鼓管功能等方面的试验性治疗。

OAE的临床应用也存在一些不足之处。当听力损失≥40dB时,OAE不能检出;中耳传声放大系统受损时,也记录不出OAE;OAE的能量幅度太低时,信号易受噪声掩盖而不能通过。因此测试OAE时应尽量选择安静的隔声环境。

(郑杰夫 闻雨婷)

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