EFFECTS OF ELECTRICAL MUSCLE STIMULATION COMBINED WITH VOLUNTARY CONTRACTIONS AFTER KNEE LIGAMENT SURGERY
EFFECTS OF ELECTRICAL MUSCLE STIMULATION COMBINED WITH VOLUNTARY CONTRACTIONS AFTER KNEE LIGAMENT SURGERY
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DOI：
10.1249/00005768-198802000-00014
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发表时间：
1988-02-01
影响因子：
4.1
通讯作者：
RENSTROM, P
中科院分区：
文献类型：
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作者：
WIGERSTADLOSSING, I;GRIMBY, G;RENSTROM, P
本研究的目的是比较前十字韧带手术后石膏固定过程中肌肉电刺激与随意肌肉收缩相结合的效果与仅采用随意肌肉收缩的方案的效果。 23 名患者，其中 7 名女性和 16 名男性，平均年龄为 28 岁，被随机分为两组：实验组（13 名患者）和对照组（10 名患者）。术后，患者用全腿石膏固定3周，膝关节弯曲20°角。至 30 度。然后再打膝关节石膏 3 周。所有患者都有股四头肌收缩的标准程序。另外，实验组接受股四头肌电刺激4次。 10 分钟，3 次 .cntdot。 wk-1，频率为 30 Hz。在每次刺激期间，患者也被要求自愿收缩股四头肌。当将术前测量值与固定期结束时（术后 6 周）的测量值进行比较时，发现对照组的膝关节伸展等长肌力下降明显大于实验组。仅比较男性受试者的数据，这种差异仍然很显着。通过计算机断层扫描测量的股四头肌横截面积在实验组固定期间比对照组明显减少。在固定期间，对照组的I型纤维的相对纤维面积以及柠檬酸合酶和三磷酸脱氢酶的活性均显着降低，但实验组则没有显着降低。因此，肌肉电刺激与同时进行的随意肌肉收缩相结合可以限制膝韧带手术后固定期间的肌肉无力、肌肉萎缩以及氧化和糖酵解肌肉酶活性的降低。
The aim of the persent study is to compare the effect of electrical muscle stimulation combined with voluntary muscle contractions with a program only with voluntary muscle contractions during immobilization in casts after anterior cruciate ligament surgery. Twenty-three patients, 7 women and 16 men with a mean age of 28 yr, were randomized into two groups: an experimental group (13 patients) and a control group (10 patients). Post-operatively, the patients were immobilized for 3 wk in a full leg cast with the knee flexed at an angle of 20.degree. to 30.degree. and then in a knee cast for another 3 wk. All patients had a standard program with quadriceps muscle contractions. In addition, the experimental group received electrical stimulation of the quadriceps muscle 4 .times. 10 min, 3 times .cntdot. wk-1, at a frequency of 30 Hz. During each stimulation, the patients were requested to contract the quadriceps muscle voluntarily as well. When pre-operative measurements were compared with those at the end of the immobilization period (6 wk after the operation), a significantly larger reduction in the knee extension isometric muscle strength was found for the control group than for the experimental group. In comparisons of the data of the male subjects only, this difference was still seen to be significant. The cross-sectional area of the quadriceps muscle measured with computed tomography was significantly less reduced during the immobilization period in the experimental group than in the control group. Both the relative fiber area of type I fibers and the activity of citrate synthase and triphosphate dehydrogenase were significantly reduced in the control group, but not in the experimental group, during the immobilization period. Thus, electrical muscle stimulation in combination with simultaneously performed voluntary muscle contractions can limit muscle weakness, muscle wasting, and the reduction in oxidative and glycolytic muscle enzyme activity during immobilization after knee ligament surgery.