Department of Physical Therapy, Western Carolina University, Cullowhee, NC 28723, USA.
PM R. 2012 Jun;4(6):402-12; quiz 412. doi: 10.1016/j.pmrj.2012.02.014.
To examine the reproducibility of repeat tests of ultrasound imaging (USI) measurement of transversus abdominis (TrA) activation in a single group of asymptomatic adults performing reaching and lifting tasks before and after abdominal drawing-in technique (ADIM) training in the supine position with TrA USI biofeedback.
Clinical measurement, longitudinal reliability study.
University laboratory.
Five male (age, 20.6 ± 4.8 years; body mass index, 25.8 ± 4.5) and 8 female (age, 18.3 ± 0.5 years; body mass index, 24.4 ± 3.3) healthy college students.
Not applicable.
Reliability and precision of minimum, maximum, and percentage of change in TrA thickness measures were examined on recorded cine loop images obtained via USI (B-mode, 7.5 MHz) for 13 asymptomatic adults. Thickness changes of the TrA muscle were measured at rest and during contraction while performing 5 functional, loaded tasks on 3 repeat tests during 3 testing sessions (ie, before ADIM training and 5 minutes and 5 months after ADIM training). The percent thickness change of TrA was calculated as [(thickness(max) - thickness(min))/thickness(min)] × 100. Reproducibility was examined by using intraclass correlation coefficients (ICC(2,k)), standard error of measurement (error variance formula), and repeated-measures analysis of variance.
Ranges of ICC and standard error of measurement values for 3 repeat tests per testing session were high and precise for single measures of minimum thickness per task (session 1: 0.68-0.93, 0.24-0.37 mm; session 2: 0.62-0.87, 0.28-0.44 mm; session 3: 0.79-0.84, 0.43-0.56 mm) and for composite measures of maximum thickness (session 1: 0.93, 0.25 mm; session 2: 0.94, 0.37 mm; session 3: 0.95, 0.64 mm) and percent change in thickness (session 1: 0.81, 12%; session 2: 0.94, 14%; session 3: 0.94, 15%). Repeated-measures analysis of variance indicated significant effects for subjects, but not repeat tests.
This study produced acceptable reproducibility of USI measures of TrA during loaded functional activities.
在接受腹部贴壁技术（ADIM）训练前和训练后，对仰卧位接受经腹横肌超声成像（TrA USI）生物反馈的无症状成年人进行伸展和举物任务时，重复测试 TrA 激活的超声成像（USI）测量，以评估其可重复性。
临床测量，纵向可靠性研究。
大学实验室。
5 名男性（年龄，20.6±4.8 岁；体重指数，25.8±4.5）和 8 名女性（年龄，18.3±0.5 岁；体重指数，24.4±3.3）健康大学生。
不适用。
通过超声成像（B 模式，7.5MHz）记录的电影循环图像，对 13 名无症状成年人进行最小、最大和 TrA 厚度变化百分比的可靠性和精密度检查。在 3 次测试期间的 3 个测试阶段（即 ADIM 训练前和 ADIM 训练后 5 分钟和 5 个月），在 5 个功能性负重任务期间，在休息和收缩时测量 TrA 肌肉的厚度变化。TrA 的厚度变化百分比计算为[（最大厚度（max）-最小厚度（min））/最小厚度（min）]×100。使用组内相关系数（ICC（2，k））、测量误差方差公式和重复测量方差分析来检查可重复性。
每个测试阶段 3 次重复测试的 ICC 和测量误差方差值范围高且精确，适用于每个任务的最小厚度的单次测量（第 1 阶段：0.68-0.93，0.24-0.37mm；第 2 阶段：0.62-0.87，0.28-0.44mm；第 3 阶段：0.79-0.84，0.43-0.56mm）和最大厚度的复合测量（第 1 阶段：0.93，0.25mm；第 2 阶段：0.94，0.37mm；第 3 阶段：0.95，0.64mm）和厚度变化百分比（第 1 阶段：0.81，12%；第 2 阶段：0.94，14%；第 3 阶段：0.94，15%）。重复测量方差分析表明，受试者有显著影响，但重复测试无显著影响。
本研究在进行负重功能活动时，对经腹横肌超声成像（TrA USI）测量的可重复性提供了可接受的结果。
