Carol A Foster1, Kathleen Zaccaro, Darcy Strong. 1. Department of Otolaryngology, University of Colorado Denver School of Medicine, Aurora, Colorado, USA. carol.foster@ucdenver.edu
Abstract
OBJECTIVE: To determine the incidence, cause, and prevention of horizontal canal benign paroxysmal positional vertigo (H-BPPV) and reentry into the common crus during canalith repositioning procedures (CRPs). STUDY DESIGN: Prospective case series. SETTING: Academic tertiary referral center. PATIENTS: Forty-four patients with symptomatic posterior canalithiasis (P-BPPV) confirmed on Dix-Hallpike. INTERVENTION: Up to 5 CRP for initial P-BPPV and additional maneuvers for canal conversion or reentry in 1 session. MAIN OUTCOME MEASURES: Incidence and timing of onset of H-BPPV or common crus reentry and the outcome of treatment maneuvers. RESULTS: H-BPPV or reentry occurred during the Dix-Hallpike after a canal-clearing CRP and affected 16% (7/44) of subjects. Approximately 87% (7/8) of reentry or conversion events occurred after the very first CRP. Geotropic H-BPPV occurred in 9% (4/44) overall but in 13% (4/30) whose P-BPPV was resolved by a single CRP. All were cleared with H-BPPV maneuvers, 3 of 4 resolving with a single Gufoni maneuver. Approximately 9% (4/44) of patients developed reentry of particles into the common crus. It was treated by raising the patient to the upright position. By waiting 15 minutes after treatment of reentry, a final normal Dix-Hallpike was obtained without causing reentry into any canal in all patients. CONCLUSION: If the first CRP clears the posterior canal, there is an elevated risk of reentry or canal conversion if another Dix-Hallpike is performed immediately. These complications can be treated by additional maneuvers; if unfamiliar with these techniques, the risk can be reduced by waiting at least 15 minutes between repetitions of CRP.
OBJECTIVE: To determine the incidence, cause, and prevention of horizontal canal benign paroxysmal positional vertigo (H-BPPV) and reentry into the common crus during canalith repositioning procedures (CRPs). STUDY DESIGN: Prospective case series. SETTING: Academic tertiary referral center. PATIENTS: Forty-four patients with symptomatic posterior canalithiasis (P-BPPV) confirmed on Dix-Hallpike. INTERVENTION: Up to 5 CRP for initial P-BPPV and additional maneuvers for canal conversion or reentry in 1 session. MAIN OUTCOME MEASURES: Incidence and timing of onset of H-BPPV or common crus reentry and the outcome of treatment maneuvers. RESULTS: H-BPPV or reentry occurred during the Dix-Hallpike after a canal-clearing CRP and affected 16% (7/44) of subjects. Approximately 87% (7/8) of reentry or conversion events occurred after the very first CRP. Geotropic H-BPPV occurred in 9% (4/44) overall but in 13% (4/30) whose P-BPPV was resolved by a single CRP. All were cleared with H-BPPV maneuvers, 3 of 4 resolving with a single Gufoni maneuver. Approximately 9% (4/44) of patients developed reentry of particles into the common crus. It was treated by raising the patient to the upright position. By waiting 15 minutes after treatment of reentry, a final normal Dix-Hallpike was obtained without causing reentry into any canal in all patients. CONCLUSION: If the first CRP clears the posterior canal, there is an elevated risk of reentry or canal conversion if another Dix-Hallpike is performed immediately. These complications can be treated by additional maneuvers; if unfamiliar with these techniques, the risk can be reduced by waiting at least 15 minutes between repetitions of CRP.
Authors: F Dispenza; A DE Stefano; C Costantino; D Rando; M Giglione; R Stagno; E Bennici Journal: Acta Otorhinolaryngol Ital Date: 2015-04 Impact factor: 2.124
Authors: Britta D P J Maas; Roeland B van Leeuwen; Sylvia Masius-Olthof; Peter Paul G van Benthem; Tjasse D Bruintjes Journal: Front Neurol Date: 2021-07-19 Impact factor: 4.003