Abstract
Of 285 ears which were operated on for chronic otitis media between January 1980 and March 1989, the postoperative prognosis of 174 ears was followed up for one year or more. 1) Postoperative hearing was still spontaneously changeable in some patients of type III and IV operations one year or more following surgery. 2) Improvements of hearing loss were not different to any significant extent depending upon whether or not the patient had otorrhea or cholesteatoma before surgical treatment, but were different depending on the lesion around the stapes. 3) Malleostapediopexy for type III operation produced satisfactory results. In cases of type IV, combined skin and cartilage flap of the external acoustic meatus proved useful for preventing the rejection of Apaceram® used for columell. 4) There were differences in the type of microorganisms in otorrhea before and after surgery.
