[Investigation of sleep position and triggered movement in patients with benign paroxysmal positional vertigo]

Objective:To investigate the characteristics of habitual sleeping position and triggered movement in patients with benign paroxysmal positional vertigo（BPPV）. Methods:The patients with idiopathic tubulitic BPPV who the symptoms were relieved after repositioning were enrolled in this study. The relationship between the side, the tube of otolith detachment and habitual sleeping position and triggered movement was analyzed. Results:①Among the 446 patients, female gender predominated（319 cases, 71.5%）, 41-60 years old group accounted for the highest proportion（192 cases, 43.0%）, and posterior semicircular canal patients accounted for the highest proportion（289 cases, 64.8%）; ②The affected side was associated with habitual sleep postion（P<0.05, ES=0.392）, ipsilateral ear was more common in left or right decubitus; ③There were statistically significant differences in the triggered movement in different types of BPPV（P<0.05, ES=0.380）, BPPV of multiple semicircular canals. Horizontal semicircular canals and posterior semicircular canals were more likely to induce vertigo and nystagmus. Conclusion:Habitual sleeping position and triggered movement could be collected during the diagnosis of BPPV, to predict the affected side and tube. The combination of Roll test and Dix-Hallpike test is more conducive to accurately distinguish the location of otolith shedding.