Abstract
We saw a sixty-year-old male patient who had had sudden deafness in the right ear 10 years after he received endolymphatic sac surgery in the left ear affected with Meniere's disease at another hospital. The right hearing could not recov-ered to the left ear level, although steroid-administration therapy at another hospital and subsequent defibrinogenation therapy with Batroxobin at our hospital were systemically performed. He eventually had to use his left post-operative ear with Meniere's disease in his daily life, although he had always made use of his right ear before the onset of sudden deafness.
It is possible that the contralateral better hearing ear in the unilateral Meniere's patients' future might be affected with sudden deafness as in this case and/or bilateral endolymphatic hydrops. However, we cannot make a prognosis of the contralateral in-ner ear function in patients with unilateral Meniere's disease by any examination in advance. We at first should perform functional improvement surgery such as endolymphatic sac surgery and intratympanic steroid therapy for intractable unilateral Meniere's disease, and then vestibular ablation surgery like vestibular neurectomy and intratympanic gentamicin therapy can be performed.
