title: Perilymph fistulas caused by myringotomy.
abstract: Two cases of rupture of the round window membrane verified by operation are presented. Both cases arose in connection with myringotomy and were presumably caused by a violent force acting directly on the tympanic membrane and the ossicles. This would result in a strong movement of the stapes and an acute change in the perilymph pressure, thereby causing an indirect injury to the round window. Symptoms and treatment are briefly discussed.
mesh_terms: D000208:Acute Disease; D000328:Adult; D000368:Aged; D005402:Fistula / Q000209:etiology* / Q000503:physiopathology; D006801:Humans; D007759:Labyrinth Diseases / Q000209:etiology* / Q000503:physiopathology; D007761:Labyrinthine Fluids; D008297:Male; D010033:Otitis Media / Q000150:complications / Q000601:surgery; D010498:Perilymph; D011183:Postoperative Complications / Q000209:etiology* / Q000503:physiopathology; D011312:Pressure; D012405:Round Window, Ear; D012422:Rupture, Spontaneous; D014432:Tympanic Membrane / Q000601:surgery*