難聴を伴う外耳及び中耳崎型の1手術症例

抄録

A 19-year-old boy complained of intense deafness of the left ear. Deformity of the left auricle, narrowness of the external auditory canal and abnormality of the tympanic membrane were observed. The audiograph showed normal bone conduction but 70 db of hearing loss by air conduction over the speech frepuency range. The radical operation of the middle ear was performed and as soon as the amboss was removed from the tympanic cavity, hearing was improved about 30 db over the speech frequency range. The auditory ossicles removed from the tympanic cavity formed one block, the capitulum of the malleus adhering to the atrophic arnboss, as seen in the photograph. Adequate plastic operation was performed on the deformity of the auricle. Deformity of the middle ear like this case is rare in this country.