动态足底压力检测痉挛型脑性瘫痪儿童步行时的特征(英文)

Gait characteristics of children with spastic cerebral palsy assessed by dynamic plantar pressure measurement

背景:压力感测鞋是一种测量地面反应力的方便快捷的工具,近来利用这些系统检测具有神经疾患儿童步态的研究正在开始进行。目的:了解痉挛型脑性瘫痪儿童步行时的动态足底压力特征。设计:病例-对照观察。单位:深圳市松岗人民医院康复科,深圳市儿童医院康复科,中山大学附属第一医院康复医学科。对象:①脑瘫组:2004-05/2005-04在深圳市儿童医院收治的痉挛型脑性瘫痪儿童20例,男9例,女11例,年龄26～66个月,均能独立步行10m以上。②正常对照组:52例具有正常步行能力的健康儿童,男28例,女24例,年龄35～76个月。方法:应用Ultraflex步态分析系统对两组儿童进行连续性足底压力测试。步态的图表和动态足底压力数据被记录并由电脑分析。主要观察指标:①记录30s内连续的所有足底压力变化曲线,选取步态稳定后的10个步态周期,经过软件分析,得到平均足底压力曲线。②由足底压力曲线提取特征量,比较两组间的差异。结果:①正常对照组儿童的足底压力曲线表现为具有2个峰和1个谷的双峰波形;半数脑瘫组儿童步态的足底压力曲线不能表现出典型的双峰曲线,其足底压力曲线表现为单一的足底压力高峰,或双侧足底压力曲线不对称,同侧不同的步态周期足底压力曲线也形态各异。②10例能得到典型足底压力双峰图及相应特征量数据的脑瘫组儿童双侧的单足支撑时间长于正常对照组[左侧:(0.879±0.658),(0.472±0.051)s;右侧:(0.818±0.682),(0.478±0.050)s;P均<0.01];右侧的到达第一、二峰值的时间与支撑时间的比值大于正常对照组(P<0.01),到达谷值的时间与支撑时间的比值小于正常对照组(P<0.01)。结论:①运用动态足底式压力步态分析方法,可直观地观察足底压力曲线图,并直接提取运动力学特征信息。②部分痉挛型脑性瘫痪患儿动态足底压力曲线不能表现出典型的双峰曲线,能得到典型足底压力双峰图的儿童,从其足底压力图中提取的各特征量数据能体现患儿步行时步态周期各时期的足底压力特征。

BACKGROUND： Pressure sensitive instrumented shoes are fast and easily used tools to measure ground reaction forces. Currently researches about the utilities of these systems in assessment of gait in children with neurological diseases have been started to run. OBJECTIVE： To find the gait characteristics of dynamic plantar pressure in children with spastic cerebral palsy DESIGN ： A cross-sectional study SETTINGS： Department of Rehabilitation, Songgang People＇s Hospital; Department of Rehabilitation, Shenzhen Children＇s Hospital; Department of Rehabilitation Medicine, the First Affiliated Hospital of Sun Yat-sen University. PARTICIPANTS： ① Patient group： Twenty children with spastic cerebral palsy were selected from Shenzhen Children＇s Hospital from May 2004 to April 2005, including 9 boys and 11 girls, aged 26-66 months old, and they all could walk for more than 10 m independently. ② Normal control group： 52 healthy children with normal walking ability were enrolled, including 28 boys and 24 girls, aged 35-76 months old. METHODS： Ultraflex gait analysis system was used to perform continuous plantar pressure tests of both groups of children. Diagram and data of dynamic plantar pressures in gait were recorded and analyzed with a computer. MAIN OUTCOME MEASURES： ①10 sequential gait cycles were chosen from the continuous stable steps to calculate the average data with the software; ②Differences of the characteristic parameters of plantar pressure curve between the two groups. RESULTS： ① The curves of plantar pressure to time of testees in the normal control group were of the wave shapes with two peaks and one valley. Half of the CP children could not perform the two-peak shape pressure curve in the gait analysis. One kind of abnormal plantar pressure curve style was a wave shape with only one peak. Another kind of abnormal plantar pressure curve style was a shape showing asymmetry between sides and variation in different steps even in the same side. Two-peak shapes of dynamic plantar pressure were recorded in 10 CP children. ② Characteristic parameters picked up from the curves of plantar pressure had been compared between the two groups. Significant difference have been found in ts of both sides and tz1 ,tz2,tz3 on the right side between the two groups. It was shown that the single-limb support time of both sides in the CP children was longer than that in healthy children [left： （0.879± 0.658）, （0.472±0.051） s; right： （0.818±0.682）, （0.478±0.050） s; P〈 0.01]. The tz1 and tz3 on the right side in the CP children were longer and while the tz2 was shorter than those in the healthy children. CONCLUSION： ① Using dynamic plantar pressure gait analysis system, plantar pressure curves can be observed directly, and information about kinetic characters can be drawn straightly. ② Part of patients with spastic CP could not perform the two-peak shape pressure curves in gait analysis. In patient can be recorded of two-peak shape dynamic plantar pressure curves, ts of both sides are shorter than those in healthy children, tz1 and tz3 on the right side is longer and tz2 is shorter than those in healthy children.