A computer-controlled contracture correction device with low-load and continuous torque: An animal experiment and prototype design for clinical use

被引:1
作者
Akai, M.
Usuba, M.
Sekiguchi, H.
Hong, B.
Iwashita, K.
Shirasaki, Y.
机构
[1] Natl Rehabil Ctr, Res Inst, Dept Rehabil & Movement Funct, Tokorozawa, Saitama 3598555, Japan
[2] Tsukuba Coll Technol, Dept Phys Therapy, Tsukuba, Ibaraki, Japan
[3] Saitama Inst Technol, Dept Mech Engn, Grad Sch Shibaura, Saitama, Japan
[4] Natl Inst Adv Ind Sci & Technol, Med Engn Lab, Tsukuba, Ibaraki, Japan
关键词
computer-controlled contracture correction device; low load; continuous torque; animal experiment; prototype design;
D O I
10.1080/03093640500495606
中图分类号
R826.8 [整形外科学]; R782.2 [口腔颌面部整形外科学]; R726.2 [小儿整形外科学]; R62 [整形外科学(修复外科学)];
学科分类号
摘要
The purpose of this study was to clarify the relationship between mechanical stress and tissue response of the contracted knee joint in rats and to propose a new design of contracture correction device for clinical use. Wistar rats were operated on to immobilize their knee joints with a procedure causing periarticular bleeding and were kept in flexed position for 40 days. At day 40, the immobilizing wire was removed, and after day 43, the contracted knee joint had been treated with tunable corrective devices secured by an external fixation method to the rear limb. These devices consisted of four types of motor-driving system which provided several different low-load and continuous stretch torques. Measuring the angle of maximum knee extension, its effectiveness was assessed comparing with a lower load and control group of natural recovery course. The device also had a cyclic joint movement within the acquired range of motion and an oval cam mechanism producing a small distraction force to the joint along its long axis. The results showed that an appropriate range of low-load continuous torque was more effective to correct joint contracture. On the basis of the animal experiment, a new computer-controlled, gas-driven contracture correction device was developed for clinical trial. It was concluded that mechanical application in a condition with low and continuous torque is a useful treatment for fixed joint contracture.
引用
收藏
页码:121 / 132
页数:12
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