Riad Jacques, Coleman Scott, Henley John, Miller Freeman
Orthopedic Department, Alfred I. duPont Hospital for Children, Wilmington, DE, USA,
J Child Orthop. 2007 Nov;1(5):307-12. doi: 10.1007/s11832-007-0053-1. Epub 2007 Oct 24.
Dynamic pediobarograph measures foot-floor contact pressure during walking and provides a quantitative functional assessment. The goal of this study was to assess the reliability of pediobarograph measurements in normal children and in those with cerebral palsy (CP).
During the first investigation, five non-disabled children and four with CP had three pediobarograph measurements taken of each foot, repeated five times. The pediobarographs were analysed by dividing the foot into five segments; the heel, the lateral midfoot, the medial midfoot, the lateral forefoot and the medial forefoot. A measure of valgus/varus foot posture was defined as the relative medial-lateral difference of combined mid- and forefoot impulse, named valgus/varus index. During the second investigation, 50 children (100 feet) with spastic diplegic CP were studied to calculate the standard error of measurements (SEM), to investigate the number of pediobarograph measurements necessary to obtain accurate results. The third investigation was an inter- and intraobserver study performed on one normal subject's repeated measurements.
In the first investigation, the group with CP had a significantly increased variability in the medial midfoot (P = 0.013). The variability of the valgus/varus index had a standard deviation of 13%, demonstrating that this measure is relatively stable. The SEM and 95% confidence interval from the second experiment showed that, even if the accuracy increased with the number of measurements, the greatest gain seemed to be contributed by increasing the number of measurements from 3 to 6. The inter- and intraobserver study showed good to mostly excellent agreement.
Pediobarograph measurements can be used to monitor and quantitatively assess the progressive changes of foot deformity over time. Pediobarograph is a reliable measurement that shows little variability between measurements at the same occasion and between measurements on different days. Three to six measurements seems practical and adequate to obtain. The technical aspect of measuring shows good repeatability and agreement between observers.
动态足压计可测量行走过程中足部与地面的接触压力，并提供定量功能评估。本研究的目的是评估足压计测量在正常儿童和脑瘫（CP）儿童中的可靠性。
在首次调查中，5名非残疾儿童和4名脑瘫儿童的每只脚进行了3次足压计测量，重复5次。通过将足部划分为五个部分来分析足压计数据；足跟、足中外侧、足中内侧、足前外侧和足前内侧。外翻/内翻足姿势的测量定义为中足和前足冲动组合的相对内外侧差异，称为外翻/内翻指数。在第二次调查中，对50名痉挛型双侧脑瘫儿童（100只脚）进行研究，以计算测量的标准误差（SEM），调查获得准确结果所需的足压计测量次数。第三次调查是对一名正常受试者的重复测量进行的观察者间和观察者内研究。
在首次调查中，脑瘫组足中内侧的变异性显著增加（P = 0.013）。外翻/内翻指数的变异性标准差为13%，表明该测量相对稳定。第二次实验的SEM和95%置信区间表明，即使测量精度随测量次数增加而提高，但最大的增益似乎来自于将测量次数从3次增加到6次。观察者间和观察者内研究显示出良好至几乎完美的一致性。
足压计测量可用于监测和定量评估足部畸形随时间的渐进性变化。足压计是一种可靠的测量方法 在同一时间的测量之间以及不同日期的测量之间显示出很小的变异性。3至6次测量似乎既实用又足够。测量的技术方面显示出良好的重复性和观察者之间的一致性。
