Sluming V A
Department of Diagnostic Radiography, University of Liverpool, UK.
Br J Radiol. 1995 Nov;68(815):1181-4. doi: 10.1259/0007-1285-68-815-1181.
Acromioclavicular joint disruption is frequently evaluated with a radiographic examination of the joint under stress (weight bearing). Certain authors recommend suspending the weights from the arm, rather than being hand-held, to allow for total muscle relaxation. This study examines the relationship between the coracoclavicular distance measured and the method of distraction. 30 normal subjects participated in the study which used ultrasound (5 MHz linear array) to measure the coracoclavicular distance under four conditions (levels of traction): non-stressed, muscles relaxed; non-stressed, muscles tensed; stressed with 7.5 kg weight hand held; stressed with 7.5 kg weight suspended from the wrist. The data were subjected to a multifactor ANOVA. The level of traction was statistically significant (p < 0.001). The data were then subjected to a Bonferroni multiple comparisons procedure. This showed a difference between the non-stressed and stressed conditions, but there was no difference between the two methods of applying stress to the joint. It was concluded that, in normal subjects, the method of performing the weight bearing examination does not have a significant effect on the magnitude of the coracoclavicular distance.
肩锁关节脱位通常通过对关节进行应力（负重）下的影像学检查来评估。某些作者建议将重物悬挂在手臂上，而不是手持，以便使肌肉完全放松。本研究探讨了测量的喙锁距离与牵引方法之间的关系。30名正常受试者参与了该研究，该研究使用超声（5兆赫线性阵列）在四种条件（牵引水平）下测量喙锁距离：无应力，肌肉放松；无应力，肌肉紧张；手持7.5千克重物施加应力；手腕悬挂7.5千克重物施加应力。对数据进行多因素方差分析。牵引水平具有统计学意义（p<0.001）。然后对数据进行Bonferroni多重比较程序。结果显示无应力和有应力条件之间存在差异，但对关节施加应力的两种方法之间没有差异。得出的结论是，在正常受试者中，进行负重检查的方法对喙锁距离的大小没有显著影响。
