[Significance of rapid axial roll test in determining the responsible semicircular canal for horizontal canal benign paroxysmal positional vertigo].

To compare the diagnostic performance of the rapid axial roll test（RART） and the traditional roll test（SRT）in determining the responsible semicircular canal for horizontal canal benign paroxysmal positional vertigo（HC-BPPV）. A total of 400 patients diagnosed with HC-BPPV from January 2020 to December 2020 were collected and randomly divided into two groups. Among them, there were 202 cases in the RART group and 198 cases in the SRT group. The patients in the two groups performed corresponding positional test respectively, and the following treatment was based on the types of induced nystagmus. The patients with typical HC-BPPV nystagmus underwent two rounds of modified Barbecure procedure. The diagnostic accuracies of the two positional tests in locating the responsible semicircular canal were evaluated by the elicitation rate of typical nystagmus. Finally, the effects of the two tests were evaluated by comparing the recovery rate of nystagmus between the two groups after repositioning procedures. The elicitation rate of nystagmus in HC-BPPV patients by RART was significantly higher than that by SRT（²=10.73，<0.01 ）. The effectiveness of repositioning procedure by RART in HC-BPPV patients was significantly higher than that of SRT（²=6.08，<0.05）. RART could significantly improve the accuracy in determining the responsible semicircular canal in HC-BPPV, and future studies are warranted.