Abstract
We analyzed the results of 8 ears of the patients with middle ear anomalies who were treated surgically from January 2010 to March 2011 at the Department of Otorhinolaryngolgy, Head and Neck Surgery in Mie University Hospital. Their ages ranged from 9 to 34 years old. The classification of anomalies were as follows: absence of the incudo-stapedial joint in 3 ears, fixation of the malleus head and incus body in one ear, fixation of the stapes footplate in one, fixation of the incus and stapes footplate in one, absence of the malleus handle in one and fixation of the malleus handle in one. We performed type I tympanoplasty in one ear, modified type III tympanoplasty in 3, modified type IV tympanoplasty in 2 and stpedotomy in 2 ears. We evaluated the postoperative hearing results according to the guideline for reporting hearing results in middle ear and mastoid surgery (2010) by the Japan Otological Society. The postoperative air bone gaps were within 15dB in 6 ears (75%). Improvement of the hearing level was 15dB and over in 6 ears (75%). The mean air conductions at three frequencies (0.5kHz, 1kHz, 2kHz) were within 30dB in 5 ears (63%). The overall success rate was 88% (7/8 ears). Postoperative air bone gaps at four frequencies (0.5kHz, 1kHz, 2kHz, 3kHz) were less than 10dB in 4 ears (50%), 11-20dB in 2 ears (25%), 21-30dB in 2 ears (25%).
