Yeo Sang W, Park Shi-Nae, Park Yong Soo, Suh Byung Do
Department of Otolaryngology-HNS, Kangnam St. Mary's Hospital, The Catholic University of Korea, College of Medicine, Seoul, Korea.
J Laryngol Otol. 2002 Oct;116(10):794-9. doi: 10.1258/00222150260293592.
Because otoacoustic emissions (OAEs) are transmitted from the cochlea to the ear canal via the middle ear, the transmission properties of the middle ear directly influence OAEs' characteristics. In general, middle-ear effusion (MEE) reduces measured emission amplitudes and sometimes eliminates the response entirely. The purpose of this study was to establish the relationship between the conduction of the middle ear and OAEs' properties and to elucidate the effect of middle-ear effusion on detecting OAEs. Spontaneous otoacoustic emissions (SOAEs), transiently evoked otoacoustic emissions (TEOAEs) and distortion product otoacoustic emissions (DPOAEs) were recorded from 44 normal ears and 32 ears with middle-ear effusion. DPOAEs were collected in two basic forms consisting of distortion product audiograms (DP grams) and input-output (I-O) functions, elicited by two primary tones F1 and F2 and varying geometric mean frequencies between 1-6 kHz. The results of air and bone conduction hearing levels in pure tone audiogram were also analysed. In 21 ears out of 32 otitis media with effusion (OME) ears, SOAEs were absent. In the 28 ears with middle-ear effusion, the response and wave reproducibility were diminished, and in the 17 ears with middle-ear effusion, the DP gram was diminished or eliminated. In particular, I-O function curves at 3 kH and 4 kHz were diminished by the primary tones of 45 and 55 dB under the condition of MEE. The SOAEs, TEOAEs and DPOAEs (DP gram and I-O function curve) are highly reliable and useful tests for monitoring changes in middle-ear condition in children with OME and in predicting the course of OME.
由于耳声发射（OAEs）通过中耳从耳蜗传输至外耳道，中耳的传输特性直接影响耳声发射的特征。一般来说，中耳积液（MEE）会降低测量到的发射幅度，有时甚至会完全消除反应。本研究的目的是建立中耳传导与耳声发射特性之间的关系，并阐明中耳积液对检测耳声发射的影响。对44只正常耳和32只中耳积液耳记录了自发性耳声发射（SOAEs）、瞬态诱发耳声发射（TEOAEs）和畸变产物耳声发射（DPOAEs）。DPOAEs以两种基本形式收集，包括畸变产物听力图（DP图）和输入-输出（I-O）函数，由两个初始音F1和F2诱发，几何平均频率在1-6kHz之间变化。还分析了纯音听力图中的气导和骨导听力水平结果。在32只中耳积液性中耳炎（OME）耳中的21只耳中，未检测到SOAEs。在28只中耳积液耳中，反应和波的重复性降低，在17只中耳积液耳中，DP图降低或消失。特别是，在中耳积液的情况下，45dB和55dB的初始音会使3kHz和4kHz处的I-O函数曲线降低。SOAEs、TEOAEs和DPOAEs（DP图和I-O函数曲线）是监测OME患儿中耳状况变化和预测OME病程的高度可靠且有用的测试。
