目的：分析不同频率与时间的经穴经皮神经电刺激对电流感觉阈值(CPT)的影响。方法通过测量颏孔区和手臂区的电流感觉阈值评价经穴经皮神经电刺激的效用。对30例健康志愿受试者的合谷穴分次给予不同刺激时间和刺激频率的经皮神经电刺激，并测量同侧颏孔区和手臂区的电流感觉阈值。结果颏孔区电流感觉阈值升高。低频电刺激对慢痛(5 Hz CPT)有明显抑制作用（P＜0.05），高频电刺激对快痛(250 Hz CPT)和慢痛均有抑制作用（P＜0.05）。经皮神经电刺激的刺激频率（β=0.363）比刺激时间（β=0.274）对疼痛的抑制作用的影响更明显。结论经穴经皮神经电刺激确实可以影响特定反应区的感觉阈值，且治疗频率的选择比单纯延长治疗时间更为重要。%Objective To analysis the consequence of current perception threshold (CPT) by different frequency and time of transcutaneous electrical nerve stimulation (TENS). Methods CPT of foramen area and arm area was measured to evaluate the effect of TENS. Different frequency and time of TENS was given to 30 healthy volunteers. Stimulating to Hegu, CPT of the foramen area and the arm area on the same side was measured. Results CPT of the foramen area increased with stimulation. Low frequency of TENS inhibited the chronic pain significantly(P<0.05),high frequency of TENS inhibited both of the chronic pain and the acute pain(P<0.05). The inhibition of pain is more influenced by the frequency of TENS than the time of it. Conclusion Channel and point of TENS can influence CPT of the specific reaction area. And the choice of appropriate frequency of the treatment is more important than extending the treatment time alone.
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