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A clinical aspect of horizontal canal positional vertigo and asymmetrical pure tone hearing threshold level Kiyoshi Hiruma 1 , Yoshinori Yanagi 1 , Kyoko Koyama 1 , Yasuyo Maeda 1 , Ryoko Watanabe 1 , Takuya Tomemori 1 , Toshio Mitsuhashi 1 1Department of Otolaryngology, Tokyo Metropolitan Komagome Hospital pp.759-764
Published Date 2014/8/20
DOI https://doi.org/10.11477/mf.1411102937
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 The horizontal semicircular canal type benign positional vertigo(hBPV)usually shows symmetrical pure tone hearing level, but in the transient geotropic type hBPV(canalolithiasis), 4/14 patients had asymmetry of pure tone audiometry(PTA)and the all affected side diagnosed by nystagmus pattern coincided with the deteriorated side of PTA. On the contrary, in the heavy or light cupula type hBPV, 6/18 patients had asymmetry of PTA and the affected side did not always coincide with the deteriorated side of PTA. This outcome was thought to be derived from the different pathophysiological cause existing between canalolithiasis and cupular lesion.


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電子版ISSN 1882-1316 印刷版ISSN 0914-3491 医学書院

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