Four cases in the control group experienced canal switching during the repositioning process, while none in the experimental group did. The experimental group achieved 100% repositioning success rate after two attempts, while the control group needed three attempts to reach 86% repositioning success rate. Results: The first repositioning success rate of the experimental group was significantly higher than that of the control group (85% vs. A BPPV virtual simulation model was used to analyze the mechanism of the modified Epley maneuver. The number of successful repositions after one, two, and three attempts and the total number of successful repositions were recorded and compared between the two groups. The control group received the traditional Epley maneuver, while the experimental group received the modified Epley maneuver, which prolonged the time in the healthy side lying position and the final bowing position. Methods: Sixty-five patients with unilateral PC-BPPV were randomly divided into two groups. Objective: To compare the repositioning effect of the modified Epley maneuver and the traditional Epley maneuver for posterior semicircular canal benign paroxysmal positional vertigo (PC-BPPV). 2Rehabilitation Department, Third Affiliated Hospital of Shanghai University, Wenzhou Third Clinical Institute Affiliated to Wenzhou Medical University, Wenzhou People’s Hospital, Wenzhou, China.1Neurology Department, Third Affiliated Hospital of Shanghai University, Wenzhou Third Clinical Institute Affiliated to Wenzhou Medical University, Wenzhou People’s Hospital, Wenzhou, China. ![]() ![]() Xiaosu Chen 1 † Jiesheng Mao 1 † Hua Ye 1 Luping Fan 2 Qiaowen Tong 1 Hehui Zhang 1 Chengcheng Wu 1 Xiaokai Yang 1 *
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