Development and application of a six degree-of-freedom knee joint goniometer

六自由度膝关节测角仪的研制与应用

• 批准号: 60870051
• 负责人: ISHIDA Akimasa
• 金额: $ 2.37万
• 依托单位: Tokyo Medical and Dental University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Developmental Scientific Research
• 财政年份: 1985
• 资助国家: 日本
• 起止时间: 1985 至 1986
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-60870051/
• 关键词: Goniometer; Knee joint; 不安定性; 膝の動揺性

To quantify manual test of knee joint instability, we developed a six dgree-of-freedom goniometer and applied it to clinical use. first, we gave mathematical definition of internal-external rotation (axial rotation). Suppose that <phi> , <theta> , <psi> denote Eulerian angles respectively. According to our definition, net axial rotation is given by integrating angular velocity<omega> =-(d <phi> )/(dt)・sin <theta> +(d <psi> )/(dt)Second, we developed a six degree-of-freedom knee goniometer. We used four sensors which detect abduction-adduction, flexion-extention, internal-external rotation angles and anterior-posterior displacement. Outputs of these sensors correspond to above-mentioned angles and displacement directly and no processing and calculation is necessary.Using this goniometer, we tried anterior-posterior drawer test, varus-valgus stress test on normal ten knees and three injured knees. Though amount of data are not enough, results of injured knees were specific to injured ligaments. And good agreement was obtained between these results and roentgenographic measurement.We are now developing unrestrained measurement apparatus of knee joint motion which adopts two inclinometers and one magnetic sensor.

为了量化人工膝关节不稳定性测试，我们研制了一种六自由度膝关节角度计，并将其应用于临床。首先给出了内-外旋转（轴向旋转）的数学定义。设，<phi><theta>，<psi>分别表示欧拉角。根据我们的定义，净轴向旋转由积分角速度<omega>=-（d<phi>）/（dt）·sin<theta>+（d<psi>）/（dt）给出。我们使用了四个传感器，检测外展-内收，屈曲-伸展，内外旋转角度和前后位移。利用该测角仪对10例正常膝关节和3例损伤膝关节进行了前后抽屉试验、内翻外翻应力试验。虽然数据量不够，但膝关节损伤的结果是特定于韧带损伤的。我们正在研制一种采用两个倾角仪和一个磁传感器的膝关节自由运动测量仪。

项目成果

Ishida Akimasa: "Development of a six degree-of-freedom knee joint goniometer" Japanese Journal of Medical Electronics and Biological Engineering. 24. 190-190 (1986)

石田昭正：“六自由度膝关节测角仪的开发”日本医学电子与生物工程杂志。

石田明允: 医用電子と生体工学. 24巻特別号. 190-190 (1986)

Akiyoshi Ishida：医疗电子学和生物工程，第 24 卷，特刊（1986 年）。