Sakashita T, Minowa Y, Hachikawa K, Kubo T, Nakai Y
Department of Otolaryngology, Osaka City University Medical School, Japan.
Acta Otolaryngol Suppl. 1991;486:66-72. doi: 10.3109/00016489109134984.
Evoked otoacoustic emissions (EOEs) were examined in ears with idiopathic sudden deafness (ISD) at an early stage after onset and were compared with those in ears with long-standing sensorineural hearing losses of unknown etiology (SHLUE). In ears with SHLUE, EOEs were not recordable from ears with a hearing loss exceeding 35 dB at minimum hearing level of 4 audiometric frequencies: 500, 1,000, 2,000 and 4,000 Hz (4 MHL). On the other hand, although 4 MHLs were greater than 35 dB in most of the ears, EOEs could be detected in about one-half of the ears with ISD, and, moreover, the majority of these EOE detectable ears showed a good hearing prognosis in spite of the degree of hearing loss. There was, however, no correlation between EOE threshold and degree of hearing recovery. From these results it seems that EOE testing might be clinically applicable for predicting whether or not hearing loss due to ISD can be recovered.
对特发性突聋（ISD）患者发病早期的耳进行诱发耳声发射（EOE）检测，并与病因不明的长期感音神经性听力损失（SHLUE）患者的耳进行比较。在SHLUE患者的耳中，当4个听力学频率（500、1000、2000和4000Hz，即4个最低听力水平，4MHL）的最低听力水平听力损失超过35dB时，无法记录到EOE。另一方面，虽然大多数ISD患者耳的4MHL大于35dB，但约一半的ISD患者耳可检测到EOE，而且，尽管听力损失程度不同，这些可检测到EOE的耳中的大多数听力预后良好。然而，EOE阈值与听力恢复程度之间没有相关性。从这些结果来看，EOE检测在临床上可能适用于预测ISD所致听力损失能否恢复。
