Abstract: Objective To evaluate the value of Fukuda stepping test for involvement lateralization semicircular canal of benign paroxysmal positional vertigo(BPPV) patients.Methods A total of 200 cases of BPPV patients admitted in the dizziness clinic of our hospital were observed.The general information was collected,and each patient took both the Fukuda stepping test and positioning test.The correlation between the results of Fukuda stepping test and the affected semicircular canal were compared.Results A total of 140 patients(70.0%) were positive of Fukuda stepping test，while 60 patients(30.0%) were negative in 200 BPPV patients.Among the 140 BPPV patients with positive Fukuda stepping test,there were 82 patients(58.6%) in which the direction of Fukuda stepping test was consistent with the side of affected semicircular canal while 58 patients(41.4%) were not.There were 131 patients (65.5%) of posterior semicircular canal involved,44 patients(22%) of geotropic horizontal semicircular canal involved,24 patients(12%) of apogeotropic horizontal semicircular canal involved and 1 patients(0.5%) of superior semicircular canal involved in 200 BPPV patients.There was no statistically significant difference between coincidence ratios of the posterior semicircular canal,geotropic horizontal semicircular canal and apogeotropic horizontal semicircular canal involved direction which were related to the deviation direction of Fukuda stepping test(P=0.630).There was no statistically significant difference in the constituent ratios of consistent or not and nagative in the direction of Fukuda stepping test and the involved direction between patients whose age≤50 years old and >50 years old（P=0.998）.There was statistically significant difference in the constituent ratios of consistent or not and nagative between patients whose onset≤1 day and >1 day（P=0.024）.Conclusion For the BPPV patients of the early stage(onset≤1 day),the deviation direction of the Fukuda stepping test has a good coincidence ratio with the affected semicircular canal side.Fukuda stepping test has some value for involvement lateralization of BPPV.

Key words: Benign paroxysmal positional vertigo, Fukuda stepping test, Positioning test