手持式电子肌力测定仪在痉挛型脑瘫儿童下肢肌力测定中的信度研究

The reliability of hand-held electronic dynamometer tests for lower limb muscle strength measurement in children with spastic cerebral palsy

目的 探讨手持式电子肌力测定仪在痉挛型脑瘫儿童下肢肌力测定中的信度.方法 以2009年2月至11月在复旦大学附属儿科医院康复中心接受康复治疗的28例3岁以上的痉挛型脑瘫患儿为研究对象,采用手持式肌力测定仪（HHD）标准化操作方法测定患儿下肢髋、膝、踝等部位肌群的肌力,任意选取20例患儿在接受第1次HHD测定后休息10 min,再由同一测试者进行重复测试,通过比较前后测试结果间的相关性来确定HHD的重测信度;在非同一天任意选取15例患儿在接受第1次HHD测定后休息10 min,再由不同测试者进行重复测试,通过比较前后测试结果间的相关性来确定HHD的不同测试者间信度.结果 HHD在测定痉挛型脑瘫患儿下肢肌群时有良好的重测信度（ICC值在0.74～0.97之间）和不同测试者间信度（ICC值在0.63～0.97之间）,其中髋屈曲、足跖屈和膝伸展肌群的重测信度最高（ICC值在0.94～0.97之间）,髋屈曲、足背屈的不同测试者间信度最高（ICC值在0.90～0.97之间）.结论 采用标准化的测试方法,手持式电子肌力测定仪在痉挛型脑瘫儿童下肢肌力测定中具有良好的重测信度和不同测试者间信度,可以良好地评价脑瘫患儿的下肢肌力.

Objective To determine the reliability of hand-held electronic dynamometer （HHD） tests for lower limb muscle strength measurement in children with spastic cerebral palsy （CP）. Methods Twenty-eight children （ 15 boys and 13 girls; mean age 5 years 8 months） with different types of CP （2 with spastic quadriplegia,8 spastic diplegia, 6 hemiplegia, 1 triplegia and 1 monoplegia） , and at different functional levels （ 19 graded at gross motor function classification system level Ⅰ, 6 level Ⅱ, 2 level Ⅲ and 1 level Ⅳ ） were recruited from the Rehabilitation Center of the Children＇s Hospital of Fudan University. Standardized HHD protocols were used to measure the strength of their hip, knee and ankle muscles. The HHD test was performed by the same examiner twice with an interval of 10 min in between. The HDD test was also performed with 15 randomly selected CP children by 2 examiners with an interval of 10 min in between. The test-retest and inter-rater reliabilities of the HDD readings were determined by calculating the intra- and inter-class correlation coefficients. Results The HHD measurements showed fine testretest reliability （ ICC = 0.74-0.97 ） and inter-rater reliability （ ICC = 0.63-0.97 ） in measuring lower-limb muscle strength of children with spastic CP, with the highest test-retest reliability for the hip flexion, foot plantar flexion and knee extension muscle groups. The highest inter-rater reliability was achieved with the hip flexion and foot dorsiflexion muscle groups. Conclusions Standardized HHD testing of lower-limb muscle strength in children with spastic CP shows fine test-retest and inter-rater reliability. The HHD can reliably assess the lower-limb muscle strength of children with spastic CP.