Wang Yong-zhi, Dong Fu-Hui, Zhong Hong-Gang, Wang De-Long, Wang Xuan
Youyi Hospital Affiliated to Capital Medical University, Beijing 100050, China.
Zhongguo Gu Shang. 2011 Dec;24(12):1020-3.
To determine the effect of tension relaxation by small needle knife on the muscle tension and morphology changes of nerve terminals when sustained pressure was applied to muscular tissue.
Rat gracilis muscles were exposed to pressure in vivo at 70 kPa for 2 hours. Sixty rats were divided into three groups: normal, control and experiment group respectively. In all rats except the six normal ones, the lower legs were considered as the control group, and the right left as experiment group. At day 1, 2 and 3, 9 rats from the two groups were randomly selected and sacrificed in order to determine the muscle tension change. At the same time, muscle histology and morphology changes of nerve terminals were observed.
Abnormal tension increased in muscles under compression of 70 kPa. At the 1st and 2nd days, there were no significant differences between the two groups. Compared with control group, the tension was lower in experiment group, and there was statistically significant difference (P < 0.01) between the two groups. Exposure of striated muscle tissue to intensive and prolonged compression may pathologically alter its microstructure. Histological evaluation showed that this stiffening accompanied extensive necrotic damage. The changes could not be found in the nerve terminals.
Deep muscle tissue that undergoes prolonged compression may significantly increase its stiffness during acute injury. Tension relaxation applied by small needle knife can effectively reduce the mechanical load which is harmful to the whole tissue.
探讨小针刀张力松解对肌肉组织持续受压时神经末梢肌肉张力及形态变化的影响。
将大鼠股薄肌在体以70 kPa压力暴露2小时。60只大鼠分为正常组、对照组和实验组。除6只正常大鼠外，其余大鼠双下肢分别作为对照组和实验组。于第1、2、3天，从两组中随机选取9只大鼠处死，测定肌肉张力变化，同时观察神经末梢的肌肉组织学及形态学变化。
70 kPa压力下肌肉异常张力增加。第1天和第2天，两组间无显著差异。与对照组相比，实验组张力较低，两组间差异有统计学意义（P < 0.01）。横纹肌组织长时间承受高强度压迫可能使其微观结构发生病理性改变。组织学评估显示这种僵硬伴有广泛的坏死损伤。神经末梢未发现此类变化。
长时间受压的深部肌肉组织在急性损伤期间可能显著增加其僵硬程度。小针刀张力松解可有效降低对整个组织有害的机械负荷。
