PDF(Pubmed)
Abstract：
OBJECTIVE: The ambition of the research group was to develop a sensor-based system that allowed the transfer of results with strain sensors applied to the knee joint. This system was to be validated in comparison to the current static mechanical measurement system. For this purpose, the internal rotation laxity of the knee joint was measured, as it is relevant for anterolateral knee laxity and anterior cruciate ligament (ACL) injury.
METHODS: This is a noninvasive measurement method using strain sensors which are applied to the skin in the course of the anterolateral ligament. The subjects were placed in supine position. First the left and then the right leg were clinically examined sequentially and documented by means of an examination form. 11 subjects aged 21 to 45 years, 5 women and 6 men were examined. Internal rotation of the lower leg was performed with a torque of 2 Nm at a knee flexion angle of 30°.
RESULTS: Comparison of correlation between length change and internal knee rotation angle showed a strong positive correlation (r = 1, p < 0.01). Whereas females showed a significant higher laxity vs. males (p = 0.003).
CONCLUSIONS: The present study showed that the capacitive strain sensors can be used for reproducible measurement of anterolateral knee laxity. In contrast to the previous static systems, a dynamic measurement will be possible by this method in the future.
METHODS: This is a noninvasive measurement method using strain sensors which are applied to the skin in the course of the anterolateral ligament. The subjects were placed in supine position. First the left and then the right leg were clinically examined sequentially and documented by means of an examination form. 11 subjects aged 21 to 45 years, 5 women and 6 men were examined. Internal rotation of the lower leg was performed with a torque of 2 Nm at a knee flexion angle of 30°.
RESULTS: Comparison of correlation between length change and internal knee rotation angle showed a strong positive correlation (r = 1, p < 0.01). Whereas females showed a significant higher laxity vs. males (p = 0.003).
CONCLUSIONS: The present study showed that the capacitive strain sensors can be used for reproducible measurement of anterolateral knee laxity. In contrast to the previous static systems, a dynamic measurement will be possible by this method in the future.
摘要：
目的：研究小组的目标是开发一种基于传感器的系统，该系统允许通过应用于膝关节的应变传感器来传递结果。与当前的静态机械测量系统相比，该系统将得到验证。为此,测量膝关节的内部旋转松弛度，因为它与膝关节前外侧松弛和前交叉韧带（ACL）损伤有关。
方法：这是一种使用应变传感器的非侵入性测量方法，该应变传感器在前外侧韧带的过程中应用于皮肤。将受试者置于仰卧位。首先依次对左腿和右腿进行临床检查，并通过检查表进行记录。11名年龄在21至45岁之间的受试者，检查了5名女性和6名男性。小腿的内部旋转以2Nm的扭矩在30°的膝盖弯曲角度下进行。
结果：长度变化与内膝旋转角度之间的相关性比较显示出强正相关（r=1，p<0.01）。而女性表现出显着更高的松弛度与男性（p=0.003）。
结论：本研究表明，电容式应变传感器可用于膝关节前外侧松弛的可重复测量。与以前的静态系统相比，这种方法将来可以进行动态测量。
方法：这是一种使用应变传感器的非侵入性测量方法，该应变传感器在前外侧韧带的过程中应用于皮肤。将受试者置于仰卧位。首先依次对左腿和右腿进行临床检查，并通过检查表进行记录。11名年龄在21至45岁之间的受试者，检查了5名女性和6名男性。小腿的内部旋转以2Nm的扭矩在30°的膝盖弯曲角度下进行。
结果：长度变化与内膝旋转角度之间的相关性比较显示出强正相关（r=1，p<0.01）。而女性表现出显着更高的松弛度与男性（p=0.003）。
结论：本研究表明，电容式应变传感器可用于膝关节前外侧松弛的可重复测量。与以前的静态系统相比，这种方法将来可以进行动态测量。
