Davilis Dimitris, Korres Stavros G, Balatsouras Dimitrios G, Gkoritsa Eleni, Stivaktakis Giannis, Ferekidis Eleftherios
ENT Department of Athens National University, Hippokration Hospital, Athens, Greece.
Med Sci Monit. 2005 Dec;11(12):MT75-8. Epub 2005 Nov 24.
Transiently evoked otoacoustic emissions (TEOAEs) is an objective diagnostic method of assessing the cochlear status. The aim of this study was to present the results of hearing screening in children and to evaluate TEOAEs in the diagnosis of middle-ear pathology compared with tympanometry and pure-tone audiometry.
MATERIAL/METHODS: A group of school-aged children underwent otolaryngological evaluation, tympanometry, TEOAEs, and audiometry. We analyzed data from both ears with abnormal tympanograms and ears with normal tympanograms but abnormal otoscopic findings or positive otologic history. Included in our study were 497 ears.
Two hundred ten (42%) ears had a tympanogram of type A, 102 (20.5%) of type B, and 185 (37.5%) of type C. Otoacoustic emissions were found in 200 (95%), 37 (36%), and 145 (78%) of these ears, respectively. In ears with a tympanogram of B type and present otoacoustic emissions, a pure-tone average (PTA) worse than 30 dB HL was found in 16 ears (43%), whereas in ears with a tympanogram of B type and absent otoacoustic emissions, PTA worse than 30 dB HL was found in 47 ears (72.3%). The respective numbers for ears with a tympanogram of C type were 18 (12.4%) and 19 (47.5%).
TEOAEs may be recorded in significant percentages of ears with abnormal tympanograms and middle-ear pathology. Although the sensitivity of this method is low, it may be used in conjunction with other methods of evaluating the middle ear and may give some information about the hearing status of the ear.
瞬态诱发耳声发射（TEOAEs）是评估耳蜗状态的一种客观诊断方法。本研究的目的是呈现儿童听力筛查结果，并与鼓室图和纯音听力测定法相比，评估TEOAEs在中耳病变诊断中的作用。
材料/方法：一组学龄儿童接受了耳鼻喉科评估、鼓室图检查、TEOAEs检测和听力测定。我们分析了鼓室图异常的双耳以及鼓室图正常但耳镜检查结果异常或有阳性耳科病史的双耳的数据。本研究纳入了497只耳。
210只耳（42%）的鼓室图为A型，102只耳（20.5%）为B型，185只耳（37.5%）为C型。这些耳中分别有200只耳（95%）、37只耳（36%）和145只耳（78%）检测到耳声发射。在鼓室图为B型且有耳声发射的耳中，16只耳（43%）的纯音平均听阈（PTA）高于30dB HL，而在鼓室图为B型且无耳声发射的耳中，47只耳（72.3%）的PTA高于30dB HL。鼓室图为C型的耳中相应数字分别为18只耳（12.4%）和19只耳（47.5%）。
在鼓室图异常和中耳病变的耳中，相当比例的耳可记录到TEOAEs。尽管该方法的敏感性较低，但可与其他评估中耳的方法联合使用，并可能提供有关耳听力状态的一些信息。
