著者

Shunkichi Baba Akiko Fukumoto Mio Aoyagi Yasuo Koizumi Tetsuo Ikezono Toshiaki Yagi

出版者

The Medical Association of Nippon Medical School

雑誌

Journal of Nippon Medical School (ISSN:13454676)

巻号頁・発行日

vol.71, no.1, pp.25-29, 2004 (Released:2004-03-01)

参考文献数

11

被引用文献数

10 10

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Objectives: To compare the usefulness of a CCD camera with infrared illumination (IR-CCD camera) over Frenzel glasses (F Glasses) for the observation of spontaneous nystagmus, the incidence and direction of nystagmus, and the frequency, amplitude and slow phase of spontaneous nystagmus. Methods: One hundred vertiginous patients, fifty-three females and forty-seven males participated in this study. Before undergoing routine neurotological examination, their eye movements were recorded by electronystagmogram (ENG) in conjunction with observations of eye movements under F glasses and through an IR-CCD camera. The data was collected from patients who exhibited spontaneous nystagmus either under F glasses or the IR-CCD camera. Results: Thirty-three patients showed spontaneous nystagmus under F glasses. On the other hand, under the IR-CCD camera, all patients examined exhibited spontaneous nystagmus. The frequency of nystagmus was not significantly different between these two systems. However, the amplitude and slow phase velocity exhibited significantly larger values under the IR-CCD camera in patients with spontaneous nystagmus both under the IR-CCD camera and F glasses. Conclusion: From these observations and evidence, the IR-CCD camera can be recommended as a more useful system and powerful tool for neurotological examination than F glasses.