鼓室形成術前後のENG検査所見

概要

論文の詳細を見る
In an attempt to clarify the effect of tympanoplasty on the vestibular systems, electronystagmograms (ENG) were recorded in 201 patients with chronic otitis media before and after tympanoplasty. ENG recordings were performed under four conditions : eyes closed and eyes open in darkness with or without mental calculation.<BR>Nystagmus was demonstrated in 61% of patients before tympanoplasty, a much higher incidence than in normal subjects. Both slow phase eye velocity and frequency of nystagmus were analyzed, and no significant difference was found before and 3 weeks or 6 months after tympanoplasty. These data suggest that vestibular disturbances in patients with chronic otitis media are irreversible and remain unstable even after tympanoplasty. On the other hand, it can be said that the surgical procedure which we used had no direct influence on the vestibular labyrinth.