Naoharu Kitajima1, Yusuke Watanabe, Mamoru Suzuki. 1. Department of Otolaryngology, Tokyo Medical University, 6-7-1 Nishishinjuku, Shinjuku-ku, Tokyo 160-0023, Japan. medart@js6.so-net.ne.jp
Abstract
OBJECTIVE: The aim of the present study was to clarify the relationship between Eustachian tube function and inner ear function, especially with respect to the hearing ability of patients with Meniere's disease. METHODS: Patients with Meniere's disease underwent nystagmic examinations and audiometric measurements, including hearing tests, tympanometry, and Eustachian tube function tests (sonotubometry). We compared the audiometric examination results of normal subjects to those of patients with Meniere's disease. RESULTS: Twenty-five percent of patients with Meniere's disease exhibited Eustachian tube dysfunction, but 92% displayed normal tympanometry findings. Their sonotubometry durations and amplitudes were not significantly different from those of normal subjects. However, the patients' hearing level was significantly correlated to sonotubometry duration and amplitude. Our patients were classified according to the four stages of Meniere's disease: stage 1 (n=9); stage 2 (n=5); stage 3 (n=8); and stage 4 (n=2). The incidence of Eustachian tube dysfunction in these four groups of patients were 0% (0/9); 40% (2/5); 38% (3/8); and 50% (1/2), respectively. CONCLUSION: Our study provides evidence demonstrating that treatment of Eustachian tube dysfunction may be useful in preventing the hearing of Meniere's patients from becoming worse.
OBJECTIVE: The aim of the present study was to clarify the relationship between Eustachian tube function and inner ear function, especially with respect to the hearing ability of patients with Meniere's disease. METHODS:Patients with Meniere's disease underwent nystagmic examinations and audiometric measurements, including hearing tests, tympanometry, and Eustachian tube function tests (sonotubometry). We compared the audiometric examination results of normal subjects to those of patients with Meniere's disease. RESULTS: Twenty-five percent of patients with Meniere's disease exhibited Eustachian tube dysfunction, but 92% displayed normal tympanometry findings. Their sonotubometry durations and amplitudes were not significantly different from those of normal subjects. However, the patients' hearing level was significantly correlated to sonotubometry duration and amplitude. Our patients were classified according to the four stages of Meniere's disease: stage 1 (n=9); stage 2 (n=5); stage 3 (n=8); and stage 4 (n=2). The incidence of Eustachian tube dysfunction in these four groups of patients were 0% (0/9); 40% (2/5); 38% (3/8); and 50% (1/2), respectively. CONCLUSION: Our study provides evidence demonstrating that treatment of Eustachian tube dysfunction may be useful in preventing the hearing of Meniere's patients from becoming worse.