垂直平面摆动试验检测垂直半规管功能及其正常值的研究

目的 利用垂直平面摆动试验检测垂直半规管功能并探讨中青年垂直半规管功能正常值.方法 运用自主研制的SRM-Ⅳ全自动前庭功能诊治系统,采用垂直平面180°正弦非阻尼摆动方法对100名18 ～59岁的健康受试者诱发垂直眼震,记录眼震视频和眼震曲线,采集眼震个数、持续时间、慢相速度等参数.将100名健康受试者以45岁为界分为青年组(68例)和中年组(32例)进行比较.试验中以右前半规管和左后半规管为一对(right anterior semicircular canal and left posterior semicircular canal,RALP),以左前半规管和右后半规管为一对(left anterior semicircular canal and right posterior semicircular canal,LARP),计算出两对垂直半规管垂直眼震平均慢相速度两侧不对称比( canal paresis,CP),采用SPSS 13.0软件进行统计学分析.结果 青年组和中年组平均慢相速度CP值差异无统计学意义(P＞0.05),总体CP值,RALP为10.2％±7.1％,LARP为10.4％±6.2％.健康中青年人群垂直半规管垂直眼震平均慢相速度CP值95％参考值范围,RALP为低于23.7％,LARP为低于22.9％;CP正常范围:≤20％为理想值,20％～ 25％为正常偏高.结论 垂直平面180°摆动试验可有效检测垂直半规管功能,此方法有望在临床得到应用.

Functional analysis of the vertical semicircular canal using vertical plane swing test and study of its normal values

Objective The purpose of this study was to set up a method to analyze the vertical semicircular canal function and study the normal values of the vertical semicircular canal function using the vertical plane swing test.Methods A prospective analysis of 100 normal persons ( aged from 18 to 59 years),who were treated by using the vertical plane swing test with the newly developed automatic vestibular function diagnosis and therapy system( SRM-Ⅳ ).These persons were rotated 180° at a sinusoidal speed (acceleration 45°/s,maximum speed 90°/s) in the vertical semicircular canal plane.Using a PC,evoked vertical nystagmus was analyzed in order to evaluate the excitability of vertical semicircular canals,including the number and the duration of nystagmus,the slow phase velocity and other parameters.Meanwhile,the all persons were divided into two groups,order and younger than 45 years respectively.In the test procedure,with the two pairs of the right anterior vertical semicircular canal and left posterior vertical semicircular canal (RALP) as well as the left anterior vertical semicircular canal and the rear right vertical semicircular canals ( LARP),the average slow phase velocity of the vertical nystagmus and the canal paresis (CP) of the two pairs of vertical semicircular canals were calculated using PC and SPSS13.0 software for statistical analysis.Results There was no significant difference between the two groups (P ＞ 0.05).The general CP of RALP was 10.2％ ± 7.1％,and LARP was 10.4％ ± 6.2％.The normal CP range of the vertical semicircular canal in the health group was identified ( idea: ≤ 20％ ; normal high: 20％ - 25％ ).Conclusion The 180°vertical plane sinusoidal swing method is effective in functional analysis of the vertical semicircular canal,it is expected to be reliably used in clinical treatment.