Vartiainen E, Vartiainen J
Department of Otolaryngology, University Hospital of Kuopio, Finland.
Eur Arch Otorhinolaryngol. 1995;252(8):459-61. doi: 10.1007/BF02114750.
The effect of preoperative bone conduction (BC) threshold levels on the results of stapedectomy was evaluated in 378 adult patients with otosclerosis. The mean follow-up period was 8.8 years. Both short-term and long-term postoperative hearing levels were found to be significantly dependent on preoperative BC levels. Only 2 of 31 patients (7%) with preoperative BC thresholds > 40 dB had postoperative hearing levels of 30 dB or better. However, hearing still improved by > or = 21 dB as often in patients with elevated preoperative BC thresholds as in patients with normal BC thresholds. These findings support the use of stapes surgery being worthwhile even in patients with highly elevated BC thresholds.
对378例成人耳硬化症患者评估了术前骨导（BC）阈值水平对镫骨切除术结果的影响。平均随访期为8.8年。发现术后短期和长期听力水平均显著依赖于术前BC水平。术前BC阈值>40 dB的31例患者中只有2例（7%）术后听力水平达到30 dB或更好。然而，术前BC阈值升高的患者听力改善≥21 dB的情况与BC阈值正常的患者一样常见。这些发现支持即使对于BC阈值大幅升高的患者，镫骨手术也是值得的。
