title: [Impedance measurements and otosclerosis (author's transl)].
abstract: Impedance measurements (model Madsen ZO 72) were performed on 158 patients with otosclerosis and compared with the operative findings. It was found that otosclerosis shows in 95% of the cases a symmetrical tympanogram, type A. Its amplitude does not differ from the standard values: that means that otosclerosis does not correlate with a flattened amplitude of the tympanogram. In addition there is no correlation between the intraoperative finding and the ampitude. The stapedius reflex could not be elicitated by acoustic stimuli.
mesh_terms: D001299:Audiometry / Q000379:methods; D004432:Ear, Middle / Q000503:physiopathology; D006801:Humans; D009132:Muscles / Q000503:physiopathology; D010040:Otosclerosis / Q000175:diagnosis* / Q000503:physiopathology; D010992:Plethysmography, Impedance / Q000379:methods; D011300:Preoperative Care; D012018:Reflex; D013199:Stapes
vernacular_title: Impedanzmessung und Otosklerose.