Neira Alejandro, Amenabar Tomas, Cristi-Sánchez Iver, Rafols Claudio, Monckeberg Juan E, Belemmi Marcos, Neira Mariano, Soldan Macarena, Silvestre Rony
Laboratorio Ciencias del Ejercicio, Clínica MEDS, Santiago, Chile.
Escuela de Kinesiología, Facultad de Ciencias, Universidad Mayor, Chile.
J Hip Preserv Surg. 2019 Jun 6;6(2):134-139. doi: 10.1093/jhps/hnz018. eCollection 2019 Jul.
Hip joint instability has been targeted as an important issue that affects normal hip function. The diagnosis of hip instability could be very challenging and currently, there is no definitive diagnostic test. Hip instability results in an excessive amount of translation of femoroacetabular articulation, leading to changes on the dynamic loading of the hip. These changes in femoroacetabular translation could be evaluated by human movement analysis methods. The purpose of this study was to describe the triaxial and overall magnitude of acceleration in patients diagnosed with hip instability during gait cycle and compare those results with a control group. Our hypothesis was that acceleration values obtained from the instability group would be higher than asymptomatic controls. Ten patients with previously diagnosed hip instability were included and 10 healthy and asymptomatic subjects were enrolled as control group. Triaxial accelerometers attached bilaterally to the skin over the greater trochanter were used to record acceleration during walking on a treadmill. The overall magnitude of acceleration and the axial, anteroposterior and mediolateral accelerations (//) were obtained during gait. Mean overall magnitude of acceleration was higher in the hip instability group compared with the control group, 1.51 g (SD: 0.23) versus 1.07 g (SD: 0.16) ( = 0.022). The axial, anteroposterior and mediolateral accelerations significantly differed between the two groups. The axial and mediolateral accelerations showed to be higher for the hip instability group while the anteroposterior axis acceleration was lower.
髋关节不稳定已被视为影响髋关节正常功能的一个重要问题。髋关节不稳定的诊断可能极具挑战性，目前尚无明确的诊断测试。髋关节不稳定会导致股骨髋臼关节过度平移，从而导致髋关节动态负荷发生变化。股骨髋臼平移的这些变化可以通过人体运动分析方法进行评估。本研究的目的是描述在步态周期中被诊断为髋关节不稳定的患者的三轴加速度和总加速度大小，并将这些结果与对照组进行比较。我们的假设是，从不稳定组获得的加速度值将高于无症状对照组。纳入了10名先前被诊断为髋关节不稳定的患者，并招募了10名健康且无症状的受试者作为对照组。双侧附着在大转子上方皮肤的三轴加速度计用于记录在跑步机上行走期间的加速度。在步态期间获得加速度的总大小以及轴向、前后向和内外侧加速度（//）。与对照组相比，髋关节不稳定组的平均加速度总大小更高，分别为1.51g（标准差：0.23）和1.07g（标准差：0.16）（P = 0.022）。两组之间的轴向、前后向和内外侧加速度存在显著差异。髋关节不稳定组的轴向和内外侧加速度较高，而前后轴加速度较低。
