Dawes P J D
Department of Otorhinolaryngology, Head and Neck Surgery, University of Otago, Dunedin, New Zealand.
Clin Otolaryngol Allied Sci. 2004 Dec;29(6):612-7. doi: 10.1111/j.1365-2273.2004.00871.x.
When reporting the results of tympanoplasty, the postoperative air-bone gap (ABG) presented in 10 dB bins, ABG closure and air conduction threshold gain are commonly reported indicators of tympanoplasty outcome. When tympanoplasty is performed, the reconstruction aims either to improve hearing threshold or to maintain satisfactory thresholds, that is, the surgical intention is either for 'hearing gain' or for 'hearing preservation'. This review of the early results of tympanoplasty examines whether classifying surgery as either for hearing gain or for hearing preservation influences the reported results. Closure of the ABG to within 20 dB was achieved in 72-94% of cases, the average postoperative ABG was between 13.1 and 17.1 dB with the postoperative air conduction threshold being between 27.4 and 33.5 dB. These figures were similar for both hearing preservation and hearing gain procedures. However air conduction threshold gain was significantly greater for the 'hearing gain' group (17 dB versus 0 dB) and was reduced to 8 dB by combining the two groups. Overall, indicating whether surgery attempted hearing preservation or hearing gain did not significantly alter the parameters used for reporting tympanoplasty outcome.
在报告鼓室成形术的结果时，术后气骨导差（ABG）以10分贝的区间呈现，ABG闭合和气导阈值提高是鼓室成形术结果中常用的报告指标。进行鼓室成形术时，重建的目的要么是提高听力阈值，要么是维持令人满意的阈值，也就是说，手术意图要么是“听力提高”，要么是“听力保留”。本对鼓室成形术早期结果的综述探讨了将手术分类为听力提高或听力保留是否会影响报告的结果。72%至94%的病例实现了ABG闭合至20分贝以内，术后平均ABG在13.1至17.1分贝之间，术后气导阈值在27.4至33.5分贝之间。听力保留和听力提高手术的这些数字相似。然而，“听力提高”组的气导阈值提高显著更大（17分贝对0分贝），两组合并后降至8分贝。总体而言，表明手术是尝试听力保留还是听力提高并没有显著改变用于报告鼓室成形术结果的参数。
