Jacobsen K
Acta Orthop Scand. 1976 Jun;47(3):335-4. doi: 10.3109/17453677608992002.
A hydraulically operated machine for applying well-defined forces to the knee joint is described. The measurement of anteroposterior as well as lateral and medial stability in the knee joint is based upon roentgenograms exposed while the forces are being exerted on the patient. The advantage of the radiological measuring method over methods using external measurements is the elimination of inaccuracies due to displacements of the soft tissues of the limb. The accuracy was evaluated by test/retest examination of 50 healthy subjects. The radiographs were measured at random after cessation of examinations in the gonylaxometer. The accuracy is +/- 1.2 nm for medial/lateral, +/- 2.4 nm for drawer sign. Diagnostically the difference between the two knees must exceed 2.0 nm (collateral instability) or 3.1 nm (drawer) to exceed standard values. The standard values for the different ligament laxities are given. The applied force to be used for evaluation of medial/lateral stability is recommended to be 9 kg, and for anteroposterior stability between 20 and 30 kg.
本文描述了一种用于对膝关节施加明确力的液压操作机器。膝关节前后以及内外侧稳定性的测量基于在对患者施加力时拍摄的X线片。与使用外部测量的方法相比，放射学测量方法的优势在于消除了由于肢体软组织移位导致的不准确性。通过对50名健康受试者进行重测检查来评估准确性。在gonylaxometer检查结束后随机测量X线片。内侧/外侧的准确性为±1.2 nm，抽屉试验为±2.4 nm。在诊断上，两膝之间的差异必须超过2.0 nm（侧副韧带不稳定）或3.1 nm（抽屉试验）才能超过标准值。给出了不同韧带松弛度的标准值。建议用于评估内侧/外侧稳定性的施加力为9 kg，用于前后稳定性的施加力为20至30 kg。
