Bone conduction impairment in chronic ear disease
Bone conduction impairment in chronic ear disease
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DOI：
10.1177/000348940111000508
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发表时间：
2001-05-01
影响因子：
1.4
通讯作者：
Meiteles, LZ
中科院分区：
文献类型：
--
作者：
Linstrom, CJ;Silverman, CA;Meiteles, LZ
前瞻性研究了24例慢性耳部疾病患者的术前和术后骨导（BC）阈值，这些疾病包括中耳炎、慢性化脓性中耳炎或粘连性中耳炎。所有患者均接受了鼓室成形术和乳突切除术。14例行听骨链重建术，其余10例尚待二期听骨链重建。各组术后结果与术前结果比较采用配对t检验。在听骨重建组中，结果显示与术前BC阈值相比，术后BC阈值在250、1，000和2，000 Hz下显著改善，在2，000 Hz下观察到最大平均改善。对于没有听骨重建的组，在任何频率下都没有观察到显着改善。在听骨重建组中观察到71%的患者术后在2个或更多频率下至少改善10 dB，而未接受听骨重建的患者则为0%。这些结果支持了这样的理论，即慢性耳部疾病患者的BC阈值升高是由于疾病消除了中耳对BC响应的贡献（来自惯性听骨成分和听骨共振）。结果还表明，中耳的贡献，BC反应恢复与听骨重建。
The preoperative and postoperative bone conduction (BC) thresholds were prospectively investigated in 24 patients with chronic ear disease in the form of cholesteatoma, chronic suppurative otitis media, or adhesive otitis media. All underwent tympanoplasty with mastoidectomy. Ossicular reconstruction was performed in 14, and the remaining 10 were still awaiting second-stage ossicular reconstruction at the rime of this investigation. In each group, the postoperative results were compared with the preoperative results by the paired-samples t-test. In the ossicular reconstruction group, the results revealed a significant improvement in the postoperative BC thresholds, as compared with the preoperative BC thresholds, at 250, 1,000, and 2,000 Hz, with the largest mean improvement observed at 2,000 Hz. No significant improvement was observed at any frequency for the group without ossicular reconstruction. Postoperative improvement of at least 10 dB at 2 or more frequencies was observed in 71% of the ossicular reconstruction group, as compared with 0% of the group that did not undergo ossicular reconstruction. The results support the theory that the elevated BC thresholds of patients with chronic ear disease result from the elimination, due to disease, of the middle ear contribution (from the inertial ossicular component and ossicular resonance) to the BC response. The results also suggest that the middle ear contribution to the BC response is restored with ossicular reconstruction.