鼓室硬化性病変の臨床的検討
1997 年 7 巻 2 号 p. 114-118
詳細
1997 年 7 巻 2 号 p. 114-118
We report clinical findings of 28 cases (28 ears) with tympanosclerosis operated on from 1988 to 1994.
Sex, age at the time of surgery, pre- and postoperative pure tone audiometric data, surgical findings, and operative results were reviewed and the following outcomes were obtained.
Twenty cases (71%) were women and the mean age was 43 years. The average air conduction threshoud was 46.4dB (±11.9dB) and more than half (53%) of the cases showed a low frequency conductive hearing loss.
Sclerotic sites were frequently recognized around the malleus and the incus, and the hearing level was most improved in patients with foci in these area (by 21.3dB) after surgical procedure.
Type III tympanoplasty, in which the incus or head of the malleus was extracted and the conchal cartilage was put on the head of the stapes, was most commonly performed. This operative procedure showed best results with average hearing improvement by 23.7dB, suggesting that it would be the method of choice for surgical treatment for tympanosclerosis.
