儿科
词汇介绍
拓展阅读
解析
Gelle's test
释义 盖莱试验
例句 Methods Pure tone audiometry, Gelle's test, acoustic impedance radiological examination were performed in the 19 patients (38 ears). 方法对19例(38耳)LVAS患者进行了纯音听阈测试、盖莱氏试验、声导抗测试及颞骨高分辨CT检查。
概述
概述
盖莱试验是1881年由Gelle首先提出并以其名字命名的一种听力学检查手段。鼓膜完整者可采用Gelle试验检查其听骨链活动度。Gelle试验是应用音叉或纯音测听使用的骨导耳机置于患耳乳突部,以一定频率和强度的持续声音作为探测音,将鼓气耳镜置于外耳道内,封闭外耳道并用橡皮球改变外耳道内压力,观察患者感受到的响度有无增强、减弱变化。
检查方法
①鼓气耳镜贴紧外耳道壁,使外耳道密闭;
②用橡皮球向外耳道内交替加、减压力的同时,将振动音叉的叉柄底部置于鼓窦区(中耳或耳道的正负压均可导致听敏锐度下降,低频段比高频道效果更明显,因此音叉常选用256 Hz或512 Hz)。
音叉检查注意事项
音叉由钢制或铝合金制成,大致呈“Y”形,常用C调倍频程五支一组的音叉,它的振动频率分别为128Hz,256Hz,512Hz,1024Hz和2048Hz。
①应击动音叉臂的上1/3处
②敲击力量应一致,不可用力过猛或敲击台桌硬物,以免产生泛音
③检查气导时应使振动的音叉上1/3的双臂平面与外耳道纵轴一致,并同外耳道口同高,距外耳道口约1 cm左右
④检查骨导时则把柄底置于颅面
⑤振动的音叉不可触及周围任何物体
Imaging of Conductive Hearing Loss With a Normal Tympanic Membrane复制标题
传导性听力损失的成像与正常鼓膜
发表时间:2016-01-01
影响指数:3.2
作者: Curtin Hugh D
期刊:AJR Am J Roentgenol
This article presents an approach to imaging conductive hearing loss in patients with normal tympanic membranes and discusses entities that should be checked as the radiologist evaluates this potentially complicated issue. Conductive hearing loss in a patient with a normal tympanic membrane is a complicated condition that requires a careful imaging approach. Imaging should focus on otosclerosis, and possible mimics and potential surgical considerations should be evaluated. The radiologist should examine the ossicular chain and the round window and keep in mind that a defect in the superior semicircular canal can disturb the hydraulic integrity of the labyrinth.
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