外侧盘状半月板损伤患者膝关节在体运动学参数研究

In vivo study on kinematic parameters of knee joints of the patients with lateral discoid meniscus injury

目的采集外侧盘状半月板损伤患者膝关节的在体运动学参数,探讨红外光导航技术在此类损伤患者在体稳定性评估中的应用价值。方法使用红外光导航膝关节在体检测系统Opti_Knee?分别采集正常人膝关节(n=24)及外侧盘状半月板损伤患者膝关节(n=24)的6个自由度数据,计算6个自由度的变化范围。结果与正常膝关节相比,外侧盘状半月板损伤患者膝关节内/外旋角度、前/后位移最大值及变化范围以及股骨外移最大值、内/外位移变化范围均明显减小(P<0.05);而最小屈曲角则显著增大(P<0.05)。结论外侧盘状半月板损伤患者膝关节内/外旋角度、前/后和内/外位移等运动学参数变化明显,红外光导航检测技术具有简单快速、数据可靠的特点,是评估患者膝关节在体稳定性的较好选择。

Objective To collect the in vivo kinematic parameters of knee joints of the patients with lateral discoid meniscus injury, and to explore the application value of infrared optical navigation technology in the evaluation of in vivo knee joint stability of the patients. Methods Six degrees of freedom （DOF） of knee joints in 24 normal human （control group） and 24 patients with lateral discoid meniscus injuries （injury group） were collected respectively by in vivo Opti_Knee？ assessment system using infrared optical navigation technology, then the ranges of six DOF were calculated. Results Compared with the data in control group, the maximum and the variation range of internal/external rotational angles, anterior/posterior displacement decreased significantly （P 〈0.05）, and the maximum of femoral outer displacement as well as the variation range of inner/outer displacement also reduced obviously （P 〈0.05）; While the minimum of flexion angle increased significantly＆amp;nbsp;（P 〈0.05）. Conclusions The kinematic parameters including internal/external rotational angles, anterior/posterior and inner/outer displacement of knee joints in the patients with lateral discoid meniscus injury changed obviously. Infrared optical navigation technique has the advantages of rapid examination and simple procedure with reliable results, which is a good choice to evaluate the in vivo stability of knee joint of the patients.