Dynamic visual acuity screening test results analysis of 25 patients with peripheral vertigo
Objective:To observe the results of dynamic visual acuity screening tests in patients with peripher-al vertigo and explore its clinical significance.Methods:The number of 48 healthy volunteers were enrolled as con-trol group and 25 peripheral vertigo patients as experimental group.In the experimental group,there are 12 pa-tients with vestibular neuritis,1 patient with Hunt syndrome,5 patients with sudden deafness with vertigo and 7 patients with bilateral vestibular dysfunction.Horizontal and vertical dynamic visual acuity screening tests were performed on them.The number of lost rows of horizontal and vertical dynamic visual acuity was compared be-tween the control group and the experimental group to figure out if there is a statistical difference.The number of lost rows of horizontal and vertical dynamic visual acuity was compared within the experimental group to figure out if there is a statistical difference.The two groups of 18 cases of unilateral vestibular function decline and 7 cases of bilateral vestibular function decline in the experimental group were compared with the control group,and figure out if there is a statistical difference.Results:The median number of lost rows of horizontal dynamic visual acuity in 48 healthy volunteers was 1.5 and median number of lost rows of vertical dynamic visual acuity was 1.0 in the control group.The median number of lost rows of horizontal dynamic visual acuity of 26 healthy volunteers was 6 and median number of lost rows of vertical dynamic visual acuity was 5 in the experimental group.Compared to the experimental group,the number of lost rows both have statistical significance in horizontal and vertical dynam-ic visual acuity(P＜0.01).The comparison of horizontal and vertical lost rows within the test group also have sta-tistical significance(P＜0.01).Twenty five patients with exceptional vestibular disease in the experimental group were divided into unilateral vestibular function reduction group(n=18)and bilateral vestibular function reduction group(n=7).Compared with the control group,there was significant differences in the number of horizontal and vertical lost rows(P＜0.01)within the three groups.After pairwise comparison,the number of lost rows of hori-zontal and vertical in the control group was significantly lower than that in the unilateral vestibular function reduc-tion group and the bilateral vestibular function reduction group(P＜0.01).There was a highly significant correla-tion between the number of horizontally lost rows of DVA and the mean vHIT values of bilateral horizontal semi-circular canals in 25 patients(P＜0.01);and a highly significant correlation between the number of vertically lost rows of DVA and the mean vHIT values of vertical semicircular canals in 4 groups bilaterally(P＜0.01).Conclu-sion:The Dynamic Visual Acuity Screening Test is a useful addition to existing tests of peripheral vestibular func-tion,particularly the vHIT test,and provides a rapid assessment of the extent of 2 Hz VOR impairment in pa-tients with reduced vestibular function.
dynamic visual acuityperipheral vertigovestibular function
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NSTL
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