title: The preoperative value of tympanometry.
mesh_terms: D001299:Audiometry; D003638:Deafness / Q000175:diagnosis / Q000503:physiopathology; D004423:Ear / Q000601:surgery*; D004427:Ear Diseases / Q000503:physiopathology; D004429:Ear Ossicles / Q000293:injuries; D004432:Ear, Middle / Q000503:physiopathology; D005064:Eustachian Tube / Q000502:physiology; D006801:Humans; D010033:Otitis Media / Q000503:physiopathology; D011300:Preoperative Care