Effect of mastoid oscillation on the outcome of the canalith repositioning procedure

Objective. The canalith repositioning procedure (CRP), as described by Epley, is a well-established method of treatment for benign paroxysmal positional vertigo (BPPV). Debate exists as to whether simultaneous application of a mastoid oscillator confers any added benefit. The aim of this study was to examine this question. Study Design: Prospective randomized study. Method: Eighty-four subjects with unilateral posterior canal BPPV were randomized into two groups. The oscillator group was treated by CRP with mastoid oscillation and the nonoscillator group was treated by CRP alone. Positive outcome was regarded as complete resolution of symptoms and a negative Dix-Hallpike's test after a 4 to 6 week follow-up period. Results. Five patients were lost to follow-up. Twenty-eight (72%) patients from the oscillator group and 26 (65%) patients from the nonoscillator group had a positive outcome. This difference was not significant (chi(2) = 0.17, P = .68) Conclusion: For the treatment of posterior canal BPPV, concurrent mastoid oscillation with CRP does not significantly alter the short-term outcome.