JOURNAL ARTICLE

Canal switch after canalith repositioning procedure for benign paroxysmal positional vertigo

Giant C Lin, Gregory J Basura, Hiu Tung Wong, Katherine D Heidenreich
Laryngoscope 2012, 122 (9): 2076-8
22549695
Canal switch is a complication following canalith repositioning procedure (CRP) for posterior canal benign paroxysmal positional vertigo (BPPV). Instead of being returned to the utricle, the loose otoconia migrate into the superior or horizontal semicircular canal. Patients remain symptomatic, and treatment can be ineffective unless the switch is recognized and additional repositioning maneuvers directed toward the appropriate semicircular canal are performed. This report provides the first videographic documentation of canal switch involving conversion of unilateral posterior semicircular canal BPPV to geotropic horizontal canalithiasis.

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