Are Postural Restrictions Necessary For Management of Posterior Canal Benign Paroxysmal Positional Vertigo?

Objectives: An important component of management of benign paroxysmal positional vertigo (BPPV) has been the application of postural restrictions after use of a canalith repositioning maneuver (CRM) to prevent the return of otolithic debris into the posterior semicircular canal (PSC). This study was designed to explore the effectiveness of postural restrictions in patients with BPPV caused by otolithic debris in the PSC. Methods: Seventy-four adult patients with unilateral PSC BPPV were enrolled into this study. All patients were managed with a CRM either the modified Epley maneuver or the Semont maneuver. The patients were divided randomly into 2 groups: group A. with postural restrictions, and group B, without postural restrictions. The statistical analysis was performed with chi(2) tests and t-tests. Results: No patients in either group showed positional nystagmus in the posttreatment evaluation under infrared videonystagmoscopy. No patients had symptoms of vertigo after the therapy. The results of follow-up vestibular tests were normal in both groups. Conclusions: In our experience, postural restrictions do not enhance the beneficial effect of the CRMs. They do not seem to have any protective role and therefore should not be recommended as an adjunct to the treatment of PSC BPPV. Key Words: BPPV, benign paroxysmal positional vertigo, Epley maneuver, posterior canal vertigo, postural restriction.