Buyruk H M, Stam H J, Snijders C J, Vleeming A, Laméris J S, Holland W P
Institute of Rehabilitation, University Hospital Rotterdam, Netherlands.
Eur J Radiol. 1995 Dec 15;21(2):112-6. doi: 10.1016/0720-048x(95)00704-t.
The validity and reproducibility of an instrumented dynamic examination method to measure sacroiliac (SI) joint stiffness was tested in vitro.
Four embalmed human female pelvises were excitated by a pelvic vibrator. A color Doppler imaging (CDI) scanner was used to image the amplitude of vibrations at different sites of the pelvis. Vibrations were applied to the anterior superior iliac spines unilaterally and were received by CDI all over the ipsilateral SI region. Three different stability conditions were created in the SI joints: no intervention, screwed and ligaments cut. Test results were quantified by taking the minimum threshold levels of the bones. The relative difference of vibration intensity between ipsilateral ilium and sacrum at each stability condition is accepted as the stiffness level for the SI joint.
Statistics showed high reproducibility and significant differences between the stability conditions. Dynamic testing based on the use of vibrations provides visible and quantifiable intra- and inter-individual differences between SI joint stiffnesses.
This new method is objective and reproducible. Future in vivo application is promising since there are no technical and safety restrictions.
在体外测试一种用于测量骶髂（SI）关节刚度的仪器化动态检查方法的有效性和可重复性。
使用骨盆振动器刺激四个经过防腐处理的女性人体骨盆。彩色多普勒成像（CDI）扫描仪用于对骨盆不同部位的振动幅度进行成像。振动单侧施加于髂前上棘，并由CDI在同侧SI区域的整个范围接收。在SI关节中创建三种不同的稳定状态：不干预、用螺钉固定和切断韧带。通过获取骨骼的最小阈值水平对测试结果进行量化。每个稳定状态下同侧髂骨和骶骨之间振动强度的相对差异被视为SI关节的刚度水平。
统计显示该方法具有高可重复性，且不同稳定状态之间存在显著差异。基于振动的动态测试能够提供SI关节刚度在个体内和个体间的可见且可量化的差异。
这种新方法客观且可重复。由于不存在技术和安全限制，未来在体内的应用前景广阔。
