| 양측성 전정장애 환자들의 전정기능검사 |
| 이근호, 김재일 정필섭 전범석 이광우 |
| 단국대학교 의과대학 신경과학교실, 이비인후과학교실, 서울대학교 의과대학 신경과학교실 |
| Bilateral Vestibulopathy and Vestibular function test |
| Geun-Ho Lee, M. D., Jae-Il Kim, M. D., Pil-Seob Jeong, M. D., Beom-Seok Jeon, M. D., Kwang-Woo Lee, M. D. |
| Department of Neurology & Otolaryngology, College of Medicine, Dankook University, Cheonan, Korea
Department of Neurology, College of Medicine, Seoul National University, Seoul, Kerea |
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| Abstract |
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Background and Objectives : Many authors(Simmons,1973, McGath et al.,1989) described that a small percentage(1-2 %) of patients initially complaining of vertigo was found to have bilateral vestibular failure (BLVF) . This study evaluates the findings of vestibular function test (VFT) including rotating chair test (ROT) and computerized dynamic posturography test (CDP) in the patients with BLVF demonstrated by caloric test and others. Method : 400 vertigo patients were given VFT from June,1994 to October,1995. In the patients who had absent or reduced responses (total eye speed <10 degrees per second) in cold (17 C) water caloric testing or decreased responses in the range of lower fequencies during ROT, we evaluated their VFT results and clinical features. Results : There were 38 cases out of total 400 patients(9.5%). Many patients with BLVF had rotational response magnitudes (at 0.04 Hz and above) that were within normal limits. CBP has shown vestibular dysfunction patterns in 32 patients. Hearing tests were normal in 9 cases and mixed hearing loss in 2 cases. Many patients experienced several episodes of acute vertigo with persistent imbalance; Only 4 patients complained of persistent oscillopsia. Viral infection (vestibuloneuronitis) , immune reactions and toxic factors may play a role in the etiology of this rare BLVF. Conclusion : Our incidence of 9.5% is much higher than what was reported in the literature. Herb medications and frequent injections of aminoglycosides may be responsible for this higher incidence of BLVF. ROT is useful in detecting and predicting the remaining vestibular function in the BLVF patients. Key Words : Bilateral vestibular failure, Electronystagmography, Vestibular function test, Rotating chair test, Posturography |
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