ABSTRACT
To study cases with positional vertigo who met criteria of benign paroxysmal positional vertigo BPPV in audiology unit Assiut university and determine the canal involvement, the type of BPPV whether canalithiasis or cupulolithiasis and evaluate the efficacy of different canalith repositioning maneuvers. Study group consists of 42 patients were diagnosed with BPPV, underwent history taking, ontological examination, neurological examination, basic audiological assessment, also patients underwent Dix-Hallpike and roll tests by infra red goggles video camera, and Electronystagmography. There were 42 patients were diagnosed with BPPV, 39 patients of them had PC-BPPV, three had HC-BPPV no AC-BPPV was found in the study group. The PC-BPPV were subdivided into canalithiasis and cupulolithiasis, it was found that 30 cases were canalithiasis and nine cases were cupulolithiasis, where all cases of HC-BPPV were canalithiasis. BPPV is the most common cause of positional vertigo and dizziness. The present study consisted of 42 BPPV patients. They are complaining of positional vertigo, which met the criteria of positional vertigo, with the characteristic positional provoked nystagmus. There were 39 patients of the 42 had posterior canal BPPV [92.86%], three cases had horizontal canal BPPV [7.14%]. The 30 patients with PC-BPPV canalithiasis were corrected with Epley's maneuver. The success rate was 86.6% after the 1[st] session of the Epley's maneuver. Eight patients of the PC-BPPV were cupulolithiasis, the success rate after the first Semont maneuver's was 55.6%, it's 77.8% after the 2[nd] session and its 88.9% after the 3[rd] session. The success rate of canalith repositioning maneuvers varies according the pathogenesis; it was very high in Eply's [96%] for canalithiasis than in Semont's for cupulolithiasis [88%]