Gierek Tatiana, Witkowska Małgorzata, Zbrowska-Bielska Danuta, Klimczak-Gołab Lucyna
Katedra i Klinika Laryngologii Sl.AM w Katowicach.
Otolaryngol Pol. 2006;60(3):377-83.
In obliterative type of otosclerosis the stapes footplate is greatly thickened and diffusely replaced by a massive otosclerotic masses that fill in the oval window niche, often annular ligament cannot be visualized. In the case of obliterative otosclerosis the only effective way of treatment is surgery.
The analysed group consisted of 53 patients with primary obliterative otosclerosis. In the control group there were 30 consecutive patients treated for otosclerosis. The auditory organ was assessed on the ground of the following criteria for the frequencies 0.5, 1, 2 and 4 kHz.: 1. Change of pure tone thresholds of air conduction (AC) 2. Change of pure tone thresholds of bone conduction (BC) 3. Change of pure tone thresholds of air-bone gap (ABG) as the difference between the mean AC and BC thresholds before the operation (AC0 and BC0) and 12 months after the operation (AC1 and BC1).
Postoperatively mean value of change of AC thresholds in the analysed group was about 24 +/- 2 dBHL and in the control group about 25 +/- 2 dBHL (no significant difference). In the analysed group the mean value of BC thresholds varied about 8 dBHL and in the control group about 11 dBHL (no significant difference). The average values of ABG after the operation varied about 14 +/- 1 dBHL in both--the analysed and the control group. Postoperatively the mean value ABG was amounted to 20 +/- 1 dBHL in the analysed group and in the control group to 18 +/- 1 dBHL (no significant difference). On the basis of the subjective assessment completely subsidence of aural tinnitus reported 70% patients in the analysed group and 80% patients in the control group.
在闭塞型耳硬化症中，镫骨足板显著增厚，并被大量耳硬化团块广泛取代，这些团块填充卵圆窗龛，常常无法看到环形韧带。对于闭塞型耳硬化症，唯一有效的治疗方法是手术。
分析组由53例原发性闭塞型耳硬化症患者组成。对照组有30例连续接受耳硬化症治疗的患者。根据以下标准对听觉器官进行评估，频率为0.5、1、2和4千赫：1. 气导纯音阈值的变化（AC）2. 骨导纯音阈值的变化（BC）3. 气骨导间距纯音阈值的变化（ABG），即手术前（AC0和BC0）与手术后12个月（AC1和BC1）平均AC和BC阈值之间的差值。
分析组术后AC阈值变化的平均值约为24±2dBHL，对照组约为25±2dBHL（无显著差异）。分析组BC阈值的平均值变化约为8dBHL，对照组约为11dBHL（无显著差异）。手术后脑电图平均值在分析组和对照组中均约为14±1dBHL。术后分析组ABG平均值为20±1dBHL，对照组为18±1dBHL（无显著差异）。根据主观评估，分析组70%的患者和对照组80%的患者报告耳鸣完全消失。
