正常成年人下肢穴位疼痛阈值检测

Comparison of Pain Thresholds of Acupoints on the Leg in Healthy Volunteers

目的:比较人体下肢穴位与非穴位痛阈的差异,探讨穴位的相对特异性。方法:制定人体随机测量数据表和人体体表图。选无心理和生理疾病的66名成年人,用Von Frey测量小腿和足部感受器阈值,分析对比穴位与非穴位痛阈值的异同。结果:膀胱经承山、昆仑、京骨和束骨的痛阈显著低于非穴位,昆仑的痛阈值最低(P<0.05);足三里同一水平节段穴位足三里、阴陵泉和阳陵泉与同一水平节段的非穴位比较,穴位处的痛阈值明显低于非穴位(P<0.05);下巨虚同一水平节段的穴位下巨虚、外丘、阳交、飞扬、漏谷与同一水平节段的非穴位比较,穴位处的痛阈值明显低于非穴位(P<0.05);解溪同一水平节段的中封、商丘、解溪、申脉相比较,解溪穴的痛阈值最高(P<0.05);分布于趾间的荥穴之间比较,侠溪穴和大都穴的痛阈值较高(P<0.05);位于足少阴肾经的水泉、太溪、筑宾和足太阴脾经的漏谷之间比较,漏谷的痛阈值最高,水泉次之(P<0.05)。结论:穴位的痛阈值明显低于非穴位,且穴位之间的痛阈值也存在差异,表明穴位确实具有相对特异性,从而为临床选穴规范化提供了依据。

Objective To detect the pain threshold of acupoints on the leg in healthy volunteers so as to analyze the sensory specificity of different acupoints. Methods A total of 66 healthy volunteers （34 male and 30 female） aged from 19 to 64 years were recruited in the present study. Pain thresholds of acupoints on the lower leg were detected by using an Electronic Von Frey Anesthesiometer after constructing an anthropometric diagram about the cutaneous division of the lower leg. Results 1 ） A- mong acupoints Shugu （BL 65）, Jinggu （BL 64）, Kunlun （BL 60）, Chengshan （BL 57） of the Bladder Meridian from the heel to the popliteal fossa, and non-acupoint （lcun lateral to BL 60）, no significant differences were found among these acupoint regions in the pain threshold （P〈0.05）, while that of the non-acupoint was significantly higher in comparison with these acupoint regions （P〈0.05）. 2） At the Zusanli （ST 36） level, no significant differences were found among the Yanglingquan （GB 34）, Zusanli （ST 36） and Yinlingquan （SP 9） regions in the pain threshold （P〉0.05） and the pain threshold was obviously higher in the non- acupoint （1 cun lateral to ST36） than in the GB34, ST36 and SP 9 regions （P〈0.05）. 3）At the Xiajuxu （ST39） level, no signi- ficant differences were found among the Xiajuxu（ST 39）, Waiqiu （GB 36）, Yangjiao （GB 35）, Feiyang （BL 58） and Lougu （SP 7） regions in the pain threshold （P〉0.05）, but the non-acupoint （1 cun lateral to ST 39） showed a higher threshold than those of the above-mentioned 5 acupoints （ P〈0.05）. 4） Among the 5 Xing-spring acupoints Dadu （SP 2）, Xingjian （LR 2）, Neiting （ST 44） and Xiaxi （GB 43） distributing in the interdistal region, the pain threshold was lowest in the Neiting （ST 44） and highest in the Xiaxi（GB 43） regions （ P〈0.05）. 5） Among the acupoints Shuiquan （KI 5）, Taixi （KI 3）, Zhubin （KI 9） and Lougu （SP 7） on the lower leg, the pain threshold was lowest in the Zhubin（KI 9） and highest in the Lougu（SP 7） regions （P〈0.05）. Conclusion In healthy subjects, the pain threshold is generally higher in the non-acupoint region and also shows a sparse lower sensory thres- hold in some acupoints as Neiting （ST 44）, Zhubin （KI 9）, etc. The specificity of acupoints needs being studied further.