Hallmo P, Mair I W
Department of Otorhinolaryngology, Ullevål University Hospital, Oslo, Norway.
Scand Audiol. 1996;25(1):35-8. doi: 10.3109/01050399609047553.
The pre- and postoperative bone-conduction thresholds for the frequencies 0.25 through 16 kHz were compared in 46 ears in which a high-speed ear drill was used. In 15 of these, thresholds were also obtained in the contralateral ear. There was no statistically significant postoperative threshold change at any single frequency in either the operated or the contralateral ear. The mean threshold elevation of 1.4 dB for the ipsilateral extended high-frequency octave of 8-16 kHz was marginally significant (p = 0.02), while this was not the case in the contralateral, unoperated ear. These findings are considered to be due to difficulties in placement of the cumbersome Präcitronic KH70 vibrator following bone removal ipsilaterally, with resultant defective transmission to the skull.
对46只使用高速耳钻的耳朵，比较了0.25至16kHz频率的术前和术后骨导阈值。其中15只耳朵的对侧耳也获得了阈值。手术耳或对侧耳在任何单个频率上术后阈值均无统计学上的显著变化。同侧8 - 16kHz扩展高频倍频程的平均阈值升高1.4dB，具有边缘显著性（p = 0.02），而对侧未手术耳则不然。这些发现被认为是由于同侧去除骨组织后，笨重的Präcitronic KH70振动器放置困难，导致向颅骨的传输出现故障。
