突発難聴新鮮例の検討

A STUDY OF THE EARLY STAGES OF SUDDEN DEAFNESS

　I．はじめに

　突発的難聴は，原因不明の突発的に発症する感音難聴の総称であり，これについて，現在まで多くの報告がなされている。これらは，しかし，主として聴覚的側面からのものであり，前庭機能に関するものは数少ない。また，聴力像に関する報告も，新鮮例のみを対象とした論文は，太田^1），佐藤^2）ほかその数はきわめて少ない。そこで本報告では，突発難聴発症後2週間以内に来院し治療を開始した51名の新鮮例を対象として，その聴力像の推移と，平衡機能検査，主として頭位眼振の推移，さらに両者の関係について分析，検討したので報告する。

　The clinical data from fifty-one patients with sudden deafness who visited our clinic withintwo weeks after the onset were analyzed.

　Positional nystagmus was observed in 76% of all patients tested on the first visit. This fact indicated that this disease frequently caused pathology not only of the cochlea but also in the vestibulum.

　From the analysis of the course of the positional nystagmus, the pathology of the vestibulum disappeared very quickly.

　The relationship between the prognosis of the hearing loss and the vertiginous sensation was also analyzed, and no statistical significance was found. Also there was no consistent relationship between the existence of spontaneous nystagmus and the prognosis of the hearing loss.