Usuba Mariko, Miyanaga Yutaka, Miyakawa Shumpei, Maeshima Toru, Shirasaki Yoshio
Doctoral Program of Sports Medicine, Graduate School of Comprehensive Human Science, University of Tsukuba, Japan.
Arch Phys Med Rehabil. 2006 Feb;87(2):247-53. doi: 10.1016/j.apmr.2005.10.015.
To compare the effects of 2 different heat modalities, infrared and ultrasonic therapy, on a knee flexion contracture.
In vivo, experimental, controlled study involving a rat knee joint contracture model that was immobilized using a ligature in flexion for 40 days.
Collegiate research laboratory.
Ninety-three adult male Wistar rats.
After remobilization, rats were assigned to 3 treatment groups: stretching only (S), stretching with infrared therapy (S+IR), and stretching with ultrasonic therapy (S+US). Six treatment sessions were given in 2 weeks.
The angle of maximum knee extension, wet-weight of triceps surae muscles, phase lag, and dynamic stiffness as mechanical responses were measured, and histologic study was conducted.
Compared with the S group, both the S+IR and S+US groups exhibited a significant increase in range of motion (ROM) (P=.021, P=.008, respectively) and a tendency to decrease the phase lag, but there was no significant difference between the 2 heat-combined groups. There were no differences in the weights of the triceps surae muscles and in dynamic stiffness among the groups.
Six treatment sessions of stretching with infrared or ultrasound were more effective than stretching without heat at increasing the ROM and decreasing the phase lag of a moderately severe joint contracture. The clinical implementation of heat is advocated to regain a normal ROM and mechanical property when experiencing a joint contracture.
比较两种不同热疗方式，即红外线疗法和超声波疗法，对膝关节屈曲挛缩的影响。
在涉及大鼠膝关节挛缩模型的体内实验性对照研究中，使用结扎线将膝关节固定于屈曲位40天。
大学研究实验室。
93只成年雄性Wistar大鼠。
重新活动后，将大鼠分为3个治疗组：仅拉伸组（S）、拉伸联合红外线治疗组（S+IR）和拉伸联合超声波治疗组（S+US）。在2周内进行6次治疗。
测量最大膝关节伸展角度、腓肠肌湿重、相位滞后和作为力学反应的动态刚度，并进行组织学研究。
与S组相比，S+IR组和S+US组的运动范围（ROM）均显著增加（分别为P=0.021，P=0.008），且相位滞后有减小趋势，但两组热疗联合组之间无显著差异。各组腓肠肌重量和动态刚度无差异。
对于中度严重的关节挛缩，进行6次红外线或超声波拉伸治疗在增加ROM和减小相位滞后方面比不进行热疗的拉伸更有效。在出现关节挛缩时，提倡采用热疗以恢复正常的ROM和力学性能。
