Department of Orthopaedic Surgery, Graduate School of Medicine, Kobe University, Kobe, Japan.
Arthroscopy. 2011 Jun;27(6):792-802. doi: 10.1016/j.arthro.2011.01.012. Epub 2011 Apr 14.
The purpose of this study was to assess quantitative anterior/posterior values during the Lachman test by an electromagnetic measurement system and to compare data with KT-1000 arthrometric measurements (MEDmetric, San Diego, CA), as well as the measurement of radiologic laxity by dynamic radiographs.
We used an electromagnetic device to quantitatively evaluate anterior knee displacements. We tested 82 knees in 41 patients (30 isolated anterior cruciate ligament [ACL]-deficient, 11 ACL-reconstructed, and 41 contralateral ACL-intact knees). Anterior displacements during the Lachman test were calculated by the electromagnetic measurement system and fluoroscopic measurement, and anterior displacements were also measured by the KT-1000 arthrometer. Anterior/posterior displacements measured by these methods were compared, and correlations were assessed.
In ACL-deficient knees, mean anterior/posterior displacement (±SE) was 22.4 ± 0.8 mm in electromagnetic measurements, 22.0 ± 0.7 mm in fluoroscopic measurements, and 15.0 ± 0.6 mm in KT-1000 measurements. In contralateral ACL-intact knees, it was 15.7 ± 0.6 mm, 15.6 ± 0.5 mm, and 9.9 ± 0.4 mm, respectively. In ACL-reconstructed knees, it was 15.7 ± 0.7 mm, 16.2 ± 0.8 mm, and 11.2 ± 0.6 mm, respectively. In all knee conditions, significant differences between fluoroscopic measurements and KT-1000 measurements were detected (P < .01). Significant differences were also detected between electromagnetic measurements and KT-1000 measurements (P < .01). No significant differences were detected between fluoroscopic measurements and electromagnetic measurements. A strong correlation was obtained between KT-1000 measurements and fluoroscopic measurements (r = 0.62, P < .01) and between electromagnetic measurements and KT-1000 measurements (r = 0.64, P < .01). However, the strongest correlation was observed between electromagnetic measurements and fluoroscopic measurements (r = 0.96, P < .01).
An electromagnetic measurement system to test anterior/posterior tibial translation determined that quantification of the Lachman test could be performed as accurately as fluoroscopic measurements.
Level II, development of diagnostic criteria on basis of consecutive patients with universally applied reference gold standard.
本研究旨在通过电磁测量系统评估 Lachman 试验中的前后定量值，并将数据与 KT-1000 关节测量仪（MEDmetric，圣地亚哥，CA）以及动态 X 线片测量的放射松弛度进行比较。
我们使用电磁设备对膝关节的前向位移进行定量评估。我们对 41 例患者的 82 个膝关节进行了测试（30 例单纯前交叉韧带[ACL]缺失，11 例 ACL 重建，41 例对侧 ACL 正常）。通过电磁测量系统和荧光测量计算 Lachman 试验中的前向位移，并使用 KT-1000 关节测量仪测量前向位移。比较这些方法测量的前后位移，并评估相关性。
在 ACL 缺失的膝关节中，电磁测量的平均前后位移（±SE）为 22.4 ± 0.8mm，荧光测量为 22.0 ± 0.7mm，KT-1000 测量为 15.0 ± 0.6mm。在对侧 ACL 正常的膝关节中，分别为 15.7 ± 0.6mm、15.6 ± 0.5mm 和 9.9 ± 0.4mm。在 ACL 重建的膝关节中，分别为 15.7 ± 0.7mm、16.2 ± 0.8mm 和 11.2 ± 0.6mm。在所有膝关节条件下，荧光测量与 KT-1000 测量之间均存在显著差异（P <.01）。电磁测量与 KT-1000 测量之间也存在显著差异（P <.01）。荧光测量与电磁测量之间无显著差异。KT-1000 测量与荧光测量之间（r = 0.62，P <.01）和电磁测量与 KT-1000 测量之间（r = 0.64，P <.01）均获得较强相关性，但电磁测量与荧光测量之间的相关性最强（r = 0.96，P <.01）。
用于测试胫骨前后平移的电磁测量系统表明，Lachman 试验的定量测量可与荧光测量一样准确。
二级，基于普遍应用的参考金标准对连续患者进行诊断标准的开发。
