Ear Research Japan
Online ISSN : 1884-5797
Print ISSN : 0288-9781
ISSN-L : 0288-9781
Vestibular Disorders due to Otitic Barotrauma in Guinea Pigs
Kazuya IshidaChiaki TagoNaoto HatakeyamaMakoto KozukaHisashi YokoiNoriyuki Yanagida
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1990 Volume 21 Issue 1 Pages 97-98

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Abstract

Vestibular effects of barotrauma were studied by morphological methods using SEM in guinea pigs. The animals were placed in a high pressure chamber and the pressure increased from 1 ATA to 2 ATA in 10 minutes, maintained at 2 ATA for 10 minutes before reducing the pressure to 1 ATA in 1 minute. Stereomicroscopy showed round window membrane rupture in most of the animals; the outstanding SEM change was a slight hair cell damage in the crista ampullaris area. Disruption and disappearance of hairs of sensory cells in the crista were observed immediately following the sudden reduction of pressure. After 2 weeks, a few supporting cells replaced the damaged hair cells in the crista.

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© Japan Otological Society
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