Cheng S C, Hulse D, Fairbairn K J, Clarke M, Wallace W A
Department of Orthopaedic & Accident Surgery, Queen's Medical Centre Campus, Nottingham University Hospitals NHS Trust, Nottingham, UK.
Skeletal Radiol. 2008 Feb;37(2):161-8. doi: 10.1007/s00256-007-0401-8. Epub 2007 Nov 21.
To determine the level of agreement between dynamic ultrasound imaging and stress radiography used for the measurement of inferior glenohumeral laxity in asymptomatic shoulders, and to determine the repeatability of the dynamic ultrasound technique.
Using a custom-made stress device to apply an inferior displacement force of 90 N, we assessed 20 asymptomatic male subjects for inferior glenohumeral laxity, using stress radiography and dynamic ultrasound. Paired differences between the two methods were evaluated by the 95% limits of agreement method. At a separate session, 19 subjects had inferior glenohumeral laxity assessed by two observers, using dynamic ultrasound. Inter- and intra-observer repeatability was determined for the ultrasound technique.
The mean [(+/-standard deviation (SD)] inferior translation was 4.7+/-4.1 mm by stress radiography and 4.4+/-2.3 mm by dynamic ultrasound. The 95% limits of agreement showed good agreement between the two methods. The paired difference between the two measurement methods varied with the magnitude of the measurement (P<0.001). Intra-observer repeatability of dynamic ultrasound was determined by the use of intra-class correlation coefficients and was 0.94 and 0.89 for the two investigators. Inter-observer repeatability was 0.85. The standard error of the measurement was 0.60 mm and 0.66 mm, for repeated measurements by the two investigators, and 0.85 mm between investigators. Repeatability coefficients demonstrated excellent consistency of measurement between sessions and good consistency between observers.
Dynamic ultrasound is a valid and reproducible method for the assessment and quantification of inferior glenohumeral laxity.
确定动态超声成像与应力X线摄影在测量无症状肩部盂肱下松弛度方面的一致性水平，并确定动态超声技术的可重复性。
使用定制的应力装置施加90 N的向下移位力，我们采用应力X线摄影和动态超声对20名无症状男性受试者的盂肱下松弛度进行评估。两种方法之间的配对差异通过一致性界限的95%方法进行评估。在另一次检查中，19名受试者由两名观察者使用动态超声评估盂肱下松弛度。确定了超声技术的观察者间和观察者内可重复性。
应力X线摄影测得的平均[（±标准差（SD）]向下移位为4.7±4.1 mm，动态超声测得为4.4±2.3 mm。一致性界限的95%显示两种方法之间具有良好的一致性。两种测量方法之间的配对差异随测量值的大小而变化（P<0.001）。动态超声的观察者内可重复性通过组内相关系数确定，两名研究者的分别为0.94和0.89。观察者间可重复性为0.85。两名研究者重复测量的测量标准误差分别为0.60 mm和0.66 mm，研究者之间为0.85 mm。重复性系数表明各次检查之间测量具有极佳的一致性，观察者之间具有良好的一致性。
动态超声是评估和量化盂肱下松弛度的一种有效且可重复的方法。
