聴力に及ぼす耳漏の影響に関する研究

概要

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Clinically, it is often experienced that some ties. Therefore this problem is studied by many cats. The results were as follows: 1) The hearing was worsened by exudate in the middle ear cavity in the patients with slight hearing loss (average; 30.1 db loss) and intact ossicular chains. 2) The hearing was improved in the range hearing loss (average:39.0 db loss) whose ossicular chains had been damaged but the round window was intact. 3) The hearing over 45 db or more loss was not influenced by the presence of exudate in the middle ear cavity.In those patients the ossicular chain and round window were firmly fixed by scar tissue. 4) Similar results were obtained by animal experiments. From the above results, it was concluded that the improvement of hearing by exudate in the middle ear cavity in cases of chronic supprative otitis media might be due to columella effect and screening effect of the exudate, under the condition that the round window and stapes moved normally.
社団法人日本耳鼻咽喉科学会の論文