1992 年 51 巻 Suppl-8 号 p. 119-121
Retro-labyrinthine vestibular disorder (RLV D) was studied in patients with sudden deafness with vertigo and/or vestibular dysfunction. RL VD was detected by the galvanic body sway test (GBST), which was developed and introduced for routine clinical use 8 years ago. From 1985 to 1990 we saw 38 patients with sudden deafness with vertigo and/or vestibular dysfunction. Twenty-seven patients had vertigo (group 1), and in 11 without vertigo caloric tests showed canal paresis (CP) (group 2). Ten (37%) in group 1 had RLVD. All those with RLVD also had evidence of CP in the caloric test. There were no patients with RLVD in group 2. The degree of hearing loss in those with RLVD was significantly more severe and their recovery of hearing loss was poorer then in patients without RLVD. These results indicate that sudden deafness with vertigo is sometimes due to disorders of the 8th cranial nerve and that cochlear nerve dysfunction may be an etiological factor of deeafness.