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首页> 外文期刊>Deutsche Zeitschrift fur Sportmedisin >Funktionelle Stabilität am Kniegelenk - eine neue Untersuchungsmethode
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Funktionelle Stabilität am Kniegelenk - eine neue Untersuchungsmethode

机译：膝关节功能稳定性-一种新的检查方法

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摘要

Stability of the knee joint may be limiting performance in sports. Especially the ACL frequently gets injured. Several testing methods are known to diagnose the stability of the knee joint. Most of them have two disadvantages: 1. Data displayed by pointer-and-scale meters are not suited for transient measurement. 2. The devices and methods can only be used, if the patient lies on the back with the knee joint muscles relaxed. We developed a device to measure the tibial translation at the knee joint. With the corresponding method, we are able to measure the drawer under functional conditions. The purpose of the study was to measure the size of the tibial translation and reflex activities of the knee joint muscles in dependence on AC-status, load of the leg and size and dynamic of the applied mechanical stimulus. We compared a group of subjects (N=12) with AC-reconstruction with a control group (N=12). In our investigations we induced an anterior drawer while the patients were standing upright with the knees slightly bend: The force, the knee joint angle and the EMGs of hamstrings and quadriceps were recorded and with the new device the anteroposterior shift of the tibia was measured. The load of the leg (loaded/unloaded), the force applied to evoke the drawer (100N/200N) and the dynamic of the applied force (slow/fast) were varied. The drawer reached a maximum of 6,0 mm under the condition leg unloaded/200N/slow. Under the condition "fast", reflex activities with a latency of about 60-70ms were recorded. We expect to measure the drawer at the knee joint exactly under functional conditions. Muscular contribution to knee joint stability can be estimated by recording reflexes of these muscles with the EMG.
机译：膝关节的稳定性可能会限制运动中的表现。特别是ACL经常受伤。已知几种测试方法可以诊断膝关节的稳定性。它们中的大多数都有两个缺点：1.指针和刻度仪表显示的数据不适合瞬态测量。 2.仅当患者仰卧且膝关节肌肉放松时才能使用该设备和方法。我们开发了一种测量膝关节胫骨平移的装置。使用相应的方法，我们能够在功能条件下测量抽屉。这项研究的目的是根据AC状态，腿的负荷以及所施加的机械刺激的大小和动态来测量膝关节肌肉的胫骨翻译和反射活动的大小。我们将一组AC重建的受试者（N = 12）与对照组（N = 12）进行了比较。在我们的研究中，当患者直立站立且膝盖略微弯曲时，我们诱发了前抽屉：记录了力量，膝盖关节角度以及腿筋和股四头肌的肌电图，并使用新设备测量了胫骨的前后移位。支腿的负荷（已加载/未加载），为唤起抽屉而施加的力（100N / 200N）和所施加的动力的动态（缓慢/快速）都发生了变化。在支脚空载/ 200N /慢的情况下，抽屉最大长度为6.0 mm。在“快速”条件下，记录了大约60-70ms潜伏期的反射活动。我们期望在功能条件下准确测量膝关节处的抽屉。可以通过记录肌电图记录这些肌肉的反射来估计肌肉对膝关节稳定性的贡献。

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