Factors affecting hearing results after stapes surgery.
Factors affecting auditory improvement after stapes surgery were investigated retrospectively on a study group of 106 otosclerotic ears (86 subjects). While the closure of the air-bone (A-B) gap after surgery was good at 2 kHz and 4 kHz, it was poor at 8 kHz and at frequencies lower than 1 kHz. Under 1 kHz, the lower the frequency, the worse the A-B gap after surgery. Stapedotomy and partial stapedectomy showed better post-operative hearing gain at 4 kHz than total stapedectomy. Total stapedectomy scored significantly better at 250 Hz and 500 Hz than stapedotomy. There was a close relationship between the pre-operative and post-operative A-B gap at frequencies under 1 kHz. The smaller the pre-operative A-B gap, the better the closure of the post-operative A-B gap at these frequencies. It was speculated that otosclerotic ears with a larger pre-operative airbone gap might have another lesion in the middle ear other than the oval window.
Ueda
H
H
Department of Otorhinolaryngology, Nagoya University School of Medicine, Japan. uehiromi@tsuru.med.nagoya-u.ac.jp
Miyazawa
T
T
Asahi
K
K
Yanagita
N
N
D000328:Adult; D001301:Audiometry, Pure-Tone; D001844:Bone Conduction; D005260:Female; D006309:Hearing; D006314:Hearing Loss, Conductive / Q000209:etiology / Q000503:physiopathology; D006801:Humans; D008297:Male; D008875:Middle Aged; D010040:Otosclerosis / Q000150:complications / Q000503:physiopathology / Q000601:surgery*; D011379:Prognosis; D012189:Retrospective Studies; D013201:Stapes Surgery / Q000379:methods*