“…Based on two class i studies, three class ii, four metanalysis and one systematic review, Fife et al 18 classified the maneuver as "Level A recommendation", in other words, treatment is effective and safe, and it should be offered to the patients of all ages with posterior canal BppV. korn et al 25 and dorigueto et al 26 studied the number of maneuvers which must be used to treat BppV and concluded that repeated maneuvers in the same session seem to be more efficient, and even more necessary when one is dealing with cupulolithiasis. it was only in one of the studies 19 hereby analyzed, that it was not possible to identify a specific number or a protocol for such, and the Cr repetition must be determined by symptom severity, if persistent, by the professional's evaluation and its successful treatment with the maneuver.…”