Preoperative Assessment of Hearing Loss

摘要: The aim of the preoperative investigations patients with hearing loss, including clinical, X-ray and audiometric examination, is to answer following questions:How great a handicap does patient have from his loss? Is there any active infection, irritation or cholesteatoma present, which can defeat an operation improve hearing? How well are Eustachian tubes functioning? Are morphological functional defects in eardrum ossicles? oval round windows good sensori-neural function? Not until these questions answered it possible judge whether indications for what type should be performed.