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目的 探讨慢性化脓性中耳炎骨导听阈的变化。方法 对 6 6例 82耳慢性化脓性中耳炎患者及 2 0名对照组进行纯音测听 ,并按病程长短将患者分为 10年以下组 (含 10年 )和 10年以上组。结果 患病组与对照组骨导曲线均为下降型 ,患病组各频率骨导听阈均值明显高于对照组 ,t检验显示两组间各频率骨导听阈差异有显著性 (P<0 .0 1)。不同病程组骨导听阈统计学处理结果显示 ,两组间各频率骨导听阈差异无显著性 (P>0 .0 5 )。结论 骨导变化与下列因素有关 :细菌毒素及缺氧对内耳的影响 ;耳毒性药物的局部使用 ;中耳病变 ;其病程的长短与骨导听阈的变化无关。
Objective To investigate the change of bone conduction threshold in chronic suppurative otitis media. Methods Totally 6 6 patients with 82 chronic otitis media with suppurative otitis media and 20 control subjects were given pure tone audiometry. Patients were divided into groups of 10 years (including 10 years) and over 10 years according to the duration of the disease. Results The bone conduction curve of the diseased group and the control group were both descending type. The average value of the bone conduction threshold of each frequency in the diseased group was significantly higher than that of the control group. The t-test showed significant difference (P <0. 0 1). Statistical analysis showed that there was no significant difference between the two groups in the bone conduction threshold (P> 0.05). Conclusion The change of bone conduction is related to the following factors: the influence of bacterial toxins and hypoxia on the inner ear; the local use of ototoxic drugs; the middle ear lesions; the course of the disease is not related to the change of the bone conduction threshold.