Berenholz L P, Rizer F M, Burkey J M, Schuring A G, Lippy W H
Lippy Group for Ear, Nose and Throat, Warren, OH 44484, USA.
Otolaryngol Head Neck Surg. 2000 Jul;123(1 Pt 1):30-3. doi: 10.1067/mhn.2000.106404.
The aim of this study was to evaluate the initial and longer term success of closing the air-bone gap (ABG) to 20 dB in ossiculoplasty with canal wall down mastoidectomy.
This study was conducted at a private otologic practice. Patients included those who underwent ossiculoplasty from 1989 to 1996 with canal wall down mastoidectomy, whether primary or revision (33 from a total of 387 tympanomastoidectomies). Outcome measures included ABG closure, long-term hearing stability, mastoid appearance, extrusion, and sensorineural hearing loss.
Almost 64% of ABGs were closed to within 20 dB. The mean pure-tone average improvement was 12.3 dB. The mean PTA hearing decline in the years after surgery was slightly less than 1 dB/year.
Hearing improvement with a stable long-term hearing result is possible with canal wall down mastoidectomy. The potential for hearing gain is greatest for patients having larger preoperative ABGs.
本研究旨在评估在开放式乳突根治鼓室成形术中，将气骨导间距（ABG）缩小至20 dB 的初期及长期手术成功率。
本研究在一家私人耳科诊所开展。患者包括1989年至1996年间接受开放式乳突根治鼓室成形术的患者，无论初次手术还是翻修手术（33例，共387例鼓室乳突切除术）。观察指标包括ABG缩小情况、长期听力稳定性、乳突外观、植入物脱出及感音神经性听力损失。
近64%的ABG缩小至20 dB以内。纯音平均改善值为12.3 dB。术后数年平均PTA听力下降略小于1 dB/年。
开放式乳突根治鼓室成形术可改善听力并获得长期稳定的听力效果。术前ABG较大的患者听力改善潜力最大。
