Potential Risk Factors Affecting Repeated Canalith Repositioning Procedures in Benign Paroxysmal Positional Vertigo

Objective: To define the risk factors and adverse effects associated with repeated canalith repositioning procedures (CRPs). Study Design: A case series featuring chart review. Setting: An academic university hospital. Patients: We retrospectively reviewed 1900 patients (average age, 54.9 years; range, 11–88 years) diagnosed with benign paroxysmal positional vertigo (BPPV). All underwent repeated CRPs. We recorded clinical features including age, gender, BPPV cause (idiopathic or secondary), symptom duration, the canal involved, the number of sessions of CRP, recurrence, follow-up duration, and complications. We compared these factors using Pearson's chi-squared test and multiple linear regression analysis with dummy variables. Interventions: BPPV was diagnosed based on the results of the head roll and Dix-Hallpike tests. Results: The overall BPPV resolution rate for patients treated with repeated CRPs was 96.4%. The risk factors for the need for multiple CRPs in BPPV were the duration of vertigo before treatment (β = 0.326, p 50 years. Address correspondence and reprint requests to Seong Jun Choi, MD, PhD, Department of Otolaryngology—Head and Neck Surgery, Soonchunhyang University College of Medicine, 31 Soonchunhyang 6gil, Cheonan, Chungcheongnam-do 31151, Republic of Korea; E-mail: akas9238@hanmail.net J.Y. and J.B.L. contributed equally to this study. This work was supported by the basic Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education, Science, and Technology grant (NRF-2015R1C1A1A01054868), and was supported by the Soonchunhyang University Research Fund. The authors disclose no conflicts of interest. Copyright © 2017 by Otology & Neurotology, Inc. Image copyright © 2010 Wolters Kluwer Health/Anatomical Chart Company

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