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Five subtypes of benign paroxysmal positional vertigo

Published online by Cambridge University Press:  05 August 2021

H Ichijo
H Ichijo*
Affiliation:
Ichijo Ear, Nose and Throat Clinic, Hirosaki, Japan
*
Author for correspondence: Dr Hiroaki Ichijo, Ichijo Ear, Nose and Throat Clinic, 3-2-1 Ekimae, Hirosaki, Japan036-8002 E-mail: hiro3387@mvj.biglobe.ne.jp Fax: +81 172 28 9568
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Abstract

Background

Benign paroxysmal positional vertigo is classified into five subtypes according to the features of positional nystagmus: lateral canalolithiasis, lateral light cupula, lateral heavy cupula, posterior canalolithiasis and posterior heavy cupula.

Objectives

The first aim of the study was to clarify whether the lateral canal type or posterior canal type was more common. The second aim of the study was to assess the aetiology of benign paroxysmal positional vertigo by investigating the onset time of each subtype.

Methods

The subjects were 512 consecutive patients with benign paroxysmal positional vertigo. The patients were prospectively aggregated, and interviews were used to evaluate onset time.

Results

The lateral canal type (55.5 per cent) was more common than the posterior canal type (44.5 per cent). Time of awakening was the most common onset time in every subtype.

Conclusion

The incidence of lateral canal type is higher than that of posterior canal type. The aetiology of benign paroxysmal positional vertigo is closely related to sleep.

Keywords

CanalolithiasisCupulolithiasisOnset TimeSemicircular Canal
Type
Main Articles
Information
The Journal of Laryngology & Otology , Volume 135 , Issue 10 , October 2021 , pp. 874 - 878
Copyright
Copyright © The Author(s), 2021. Published by Cambridge University Press

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Footnotes

Dr H Ichijo takes responsibility for the integrity of the content of the paper

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