[Dynamic visual acuity screening test results analysis of 25 patients with peripheral vertigo].

Zhao, Dong; Jiang, Zigang; Li, Chunjiao

ABSTRACT

Objective:

To observe the results of dynamic visual acuity screening tests in patients with peripheral vertigo and explore its clinical significance.

Methods:

The number of 48 healthy volunteers were enrolled as control group and 25 peripheral vertigo patients as experimental group. In the experimental group, there are 12 patients 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 between 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 dynamic visual acuityï¼P<0.01ï¼. The comparison of horizontal and vertical lost rows within the test group also have statistical significanceï¼P<0.01ï¼. Twenty five patients with exceptional vestibular disease in the experimental group were divided into unilateral vestibular function reduction groupï¼n=18ï¼ and bilateral vestibular function reduction groupï¼n=7ï¼. Compared with the control group, there was significant differences in the number of horizontal and vertical lost rowsï¼P<0.01ï¼ within the three groups. After pairwise comparison, the number of lost rows of horizontal and vertical in the control group was significantly lower than that in the unilateral vestibular function reduction group and the bilateral vestibular function reduction groupï¼P<0.01ï¼. There was a highly significant correlation between the number of horizontally lost rows of DVA and the mean vHIT values of bilateral horizontal semicircular canals in 25 patientsï¼P<0.01ï¼; 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 bilaterallyï¼P<0.01ï¼.

Conclusion:

The Dynamic Visual Acuity Screening Test is a useful addition to existing tests of peripheral vestibular function, particularly the vHIT test, and provides a rapid assessment of the extent of 2 Hz VOR impairment in patients with reduced vestibular function.