| ObjectiveVestibular function is the important function of human feeling. Vestibular system function testing can diagnosis vestibular system disease,it is only foces on the testing of the function of semicircular canals,because of anatomy, physiology characteristics and technical limitations of the otolith organs,the testing of otolith organs difficult to effectively develop in clinical. Following the recent studies of subjective visual horizon (SVH) and subjective visual vertical(SVV), the SVV and SVH can use in clinic estimate the function of otolith organs. In our study,we want to summary the reference range of SVH and SVV in normal person,then we want to analyze SVV and SVH with the qualitation and quantilation for unilateral vestibular hypofunction and investigate its influencing factors. The purpose of our study is to analyze the character of subjective visual horizontal(SVH) and evaluate the clinical value of vestibular function in peripheral unilateral vestibular hypofunction.Methods85 patients (male 38, female 47) who visited the balance center from March 2009 to May 2010 with unilateral vestibular peripheral vertigo and the latest attack of vertigo within one month were enrolled in this study as experimental group. All patients were accepted related otology, neurology or imageology examination to exclude patients with vestibular central vertigo. They were diagnosed with sudden deafness with vertigo in 50, vestibular neuritis in 18,Hunt's syndrome in 4. unilateral chronic otitis media in 4,Meniere disease in 9.Meanwhile,39 normal persons (male 18, female 21) who accepted examinations at the same period were enrolled in this study as control group.They have no cases history of otology,vertigo,intracalvarium and nervous disease, the results of ophthalmology were also normal.85 patients with unilateral peripheral vertigo(experimental group) and 39 normal persons (control group) were performed with SVV,SVH and Caloric test (CT) by Video-Nystagmography (Synapsys, France), to make sure of parametric range of normal values inSVV,SVH. The angle of SVH and SVV, directional preponderance(DP) and unilateral weakness(UW) of Caloric test were selected as the observation parameters. Then the correlation between SVH/SVV, DP, UW and the course of disease were investigated respectively.Results1,In control group, the deflection Angle of SVH,SVV with positively normal distribution, the right deflection Angle of SVH,SVV is 0.80±0.58°,0.93±0.54°respectively,the 95% confidence interal is 0°～1.94°,0°1.99°respectively; the left deflection Angle of SVH,SVV is 1.13±0.44°,0.94±0.53°respectively, the 95% confidence interal is 0.27°～1.99°,0°～1.98°respectively. Of course, the reference range of SVH and SVV was from—2°to 2°in control group. Of the 185 patients, the right deflection Angle of SVH,SVV is 4.26±4.56°,4.40±4.67°respectively, the left deflection Angle of SVH,SVV is 4.10±4.69°,4.32±4.80°respectively, There is statistical difference between the normal person and patiemts in these two groups.2,In unilateral vestibular hypofunction, there were positive correlation among SVH, SVV and DP(r=0.939,r=0.648, r=0.658, P<0.05) respectively, but no correlation between UW and SVH/SVV(r=0.048, r=0.085, P>0.05).3,According to four parameters were positive or negative, three main groups (SVH+/SVV+DP+UW+, SVH-/SVV-DP+UW+, SVH-/SVV-DP-UW+) in SVH/SVV, DP, UW. The course of disease in three main groups was positively skewed distribution. Median was 5,10,15 d and 5,9.5,14.5 d respectively. Through Kruskal-Wallis Test,χ(?)value was 8.80 ans 6.26, respectively, all P<0.05, there was statistical significance among the above three main groups.ConclusionEither of abnormal SVH and SVV value can evaluate function of the otolithic, The angle of SVH and SVV are changing in the course of disease, SVH and SVV can be taken as a guidance of the vestibular compensation evaluated. |
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