Pröschel U, Eysholdt U, Berg M
Abteilung für Phoniatrie und Pädaudiologie, Universität Erlangen-Nürnberg.
HNO. 1994 Apr;42(4):229-32.
Click-evoked transitory otoacoustic emissions (TEOAE) were recorded in 34 patients suspected of having an acoustic neuroma with consequent hearing loss. Measurements took place one day prior to transtemporal removal of tumor. The evoked otoacoustic emissions were compared to hearing thresholds of the pure-tone audiogram. In 31 of the 34 patients tested, the spectrum of the emissions corresponded to the audiogram, in that an emission was not detectable at frequencies with a hearing loss exceeding 30 dB HL. Three patients showed good emissions in spite of a demonstrable hearing loss. This can be expected when only retrocochlear lesions are present. These results suggest that in most cases the hearing loss accompanying a retrocochlear process is combined with secondary lesions of the cochlea and is rarely due to isolated retrocochlear malfunction.
对34例疑似患有听神经瘤并伴有听力损失的患者进行了瞬态诱发性耳声发射（TEOAE）记录。测量在经颞部切除肿瘤前一天进行。将诱发的耳声发射与纯音听力图的听力阈值进行比较。在34例接受测试的患者中，有31例的发射频谱与听力图相符，即在听力损失超过30 dB HL的频率处检测不到发射。尽管有明显的听力损失，但仍有3例患者显示出良好的发射。当仅存在蜗后病变时，这种情况是可以预料的。这些结果表明，在大多数情况下，蜗后病变伴随的听力损失与耳蜗的继发性病变相关，很少是由于孤立的蜗后功能障碍所致。
