Arvidsson I, Eriksson E
Orthopedics. 1986 Oct;9(10):1346-51. doi: 10.3928/0147-7447-19861001-06.
A comparison was made between the pain-relieving effect of placebo-transcutaneous electrical nerve stimulation (TENS), high frequency TENS, and epidural analgesia with dilute local anesthetics in 15 patients with open knee surgery. Assessment of pain was compared with the patients' ability to contract their quadriceps muscle; the ability was measured with integrated EMG (IEMG) before and after the different treatments. The results showed that placebo-TENS had no significant effect on either pain perception or on IEMG. High frequency TENS given for 15 min to 20 min decreased pain perception by 50% at rest and by 11% after quadriceps contraction. High frequency TENS increased muscle contraction ability by 305%, compared with the initial contraction before treatment. Epidural injection of a dilute local anesthetic decreased pain perception by 90% at rest and by 67% after contraction, and increased muscle contraction ability by 1,846%. TENS undoubtedly has a place in the postoperative pain treatment, although its effect is not as strong as that of epidural analgesia with local anesthetics. TENS, however, is easy to administer, lacks side effects, and can be administered by the patients themselves.
对15例行开放性膝关节手术的患者，比较了安慰剂经皮电刺激神经疗法（TENS）、高频TENS以及硬膜外注射稀释局部麻醉药的镇痛效果。将疼痛评估结果与患者收缩股四头肌的能力进行比较；该能力通过不同治疗前后的肌电图积分（IEMG）来测量。结果显示，安慰剂TENS对疼痛感知或IEMG均无显著影响。高频TENS持续给予15分钟至20分钟，可使静息时的疼痛感知降低50%，股四头肌收缩后的疼痛感知降低11%。与治疗前的初始收缩相比，高频TENS使肌肉收缩能力提高了305%。硬膜外注射稀释局部麻醉药可使静息时的疼痛感知降低90%，收缩后的疼痛感知降低67%，并使肌肉收缩能力提高了1846%。TENS在术后疼痛治疗中无疑占有一席之地，尽管其效果不如硬膜外注射局部麻醉药镇痛效果强。然而，TENS易于实施，无副作用，且患者自己即可操作。
