Liu Ran-ran, Chen Tai-sheng, Lin Peng, Dong Hong, Lu Hong-hua, Zhang Na
First Center Clinical College of Tianjin Medical University, Tianjin 300070, China.
Zhonghua Er Bi Yan Hou Tou Jing Wai Ke Za Zhi. 2011 May;46(5):382-7.
To analyze the characteristics of subjective visual horizontal (SVH) and evaluate its clinical value for vestibular function in peripheral unilateral vestibular hypofunction (UVH).
Eighty-five patients with UVH (study group) and 39 normal persons (control group) accepted vestibular function tests, including SVH, subjective visual vertical (SVV) and caloric test by video-nystagmography. The parameters of the angle of SVH and SVV, directional preponderance (DP) and unilateral weakness (UW) of caloric test were observed. The correlation between SVH/SVV, DP, UW and the course of disease were investigated respectively. SPSS 16.0 software was used to analyze the data.
Reference range of SVH and SVV was from -2° to 2° in the control group. Among the 85 patients, 46 cases (54.1%) and 43 cases (50.6%) had the abnormal values of SVH and SVV respectively, with no statistical significance (χ(2) = 12.5, P = 0.481) by chi square test. Fifty-five cases (64.7%) with abnormal DP had no statistical significance when compared with SVH and SVV respectively (χ(2) values were 0.19 and 2.86, respectively, P value were 0.164, 0.067, respectively). In UVH, there were positive correlation between SVH, SVV and DP (r value was 0.939, 0.648, 0.658, all P < 0.05) respectively, but no correlation between UW and SVH or SVV (r value was 0.048, 0.085, all P > 0.05). According to the permutation and combination of the four parameters, positive or negative, three main groups could be defined [SVH(+)DP(+)UW(+), SVH(-)DP(+)UW(+), SVH(-)DP(-)UW(+); SVV(+)DP(+)UW(+), SVV(-)DP(+)UW(+), SVV(-)DP(-)UW(+)]. The course of disease in the three main groups was positively skewed distribution, with median of 5.0, 10.0, 15.0 d and 5.0, 9.5, 14.5 d respectively. By Kruskal-Wallis Test, χ(2) value were 8.80 and 6.26, respectively(P value were 0.012, 0.040, respectively), with statistical significance between the above three main groups.
The SVH value can evaluate the function of the otolithic. The angle of SVH and SVV are changing in the course of disease, SVH and SVV can be used as a guidance of the vestibular compensation evaluation.
分析主观视觉水平（SVH）的特征，并评估其在外周单侧前庭功能减退（UVH）中对前庭功能的临床价值。
85例UVH患者（研究组）和39名正常对照者（对照组）接受了前庭功能测试，包括SVH、主观视觉垂直（SVV）以及视频眼震图的冷热试验。观察SVH和SVV的角度参数、冷热试验的方向优势（DP）和单侧眼震减弱（UW）。分别研究SVH/SVV、DP、UW与病程之间的相关性。采用SPSS 16.0软件进行数据分析。
对照组中SVH和SVV的参考范围为-2°至2°。85例患者中，分别有46例（54.1%）和43例（50.6%）的SVH和SVV值异常，经卡方检验无统计学意义（χ(2)=12.5，P=0.481）。55例（64.7%）DP异常者分别与SVH和SVV比较无统计学意义（χ(2)值分别为0.19和2.86，P值分别为0.164、0.067）。在UVH中，SVH、SVV与DP之间分别呈正相关（r值分别为0.939、0.648、0.658，均P<0.05），但UW与SVH或SVV之间无相关性（r值分别为0.048、0.085，均P>0.05）。根据四个参数的正负排列组合，可定义三个主要组[SVH(+)DP(+)UW(+)、SVH(-)DP(+)UW(+)、SVH(-)DP(-)UW(+)；SVV(+)DP(+)UW(+)、SVV(-)DP(+)UW(+)、SVV(-)DP(-)UW(+)]。三个主要组的病程呈正偏态分布，中位数分别为5.0、10.0、15.0天和5.0、9.5、14.5天。经Kruskal-Wallis检验，χ(2)值分别为8.80和6.26（P值分别为0.012、0.040），上述三个主要组之间有统计学意义。
SVH值可评估耳石功能。SVH和SVV的角度在病程中发生变化，SVH和SVV可作为前庭代偿评估的指导指标。
