使用血流成像技术对“腰背委中求”经典理论的验证

目的:观察针刺委中等穴对腰部皮肤血流的影响,以验证"腰背委中求"的经典针灸理论。方法:应用激光多谱勒血流成像仪对比观察40名受试者针刺委中和阳陵泉前后腰部皮肤微循环血流量变化及血流分布情况。将受试者腰部划分成整体区域和左右膀胱经第一、二侧线五个区域,以血流变化率为指标比较分析针刺委中和阳陵泉对腰部体表血流改变的效应差异。结果:针刺委中和阳陵泉后腰部整个区域的皮肤血流量与针前比较均显著升高,并持续至起针后12 min(P<0.05),针刺两穴的血流变化率比较无显著性差异。针刺委中穴后,同侧腰部膀胱经第一、二侧线上的皮肤血流变化率显著高于针刺阳陵泉(P<0.05),其它区域无显著性差异。结论:针刺委中穴对腰的特异性作用可体现在使针刺侧腰部膀胱经皮肤血流的升高上,这种效应有可能导致膀胱经循经低流阻通道阻力下降,疏通经络,产生"通则不痛"的治疗效果。

Experimental Verification of "Treating Lumbar-back Problems by Puncturing Weizhong (BL 40)" with Blood Perfusion Imaging Technique

OBJECTIVE: To verify the classic saying of "Treating lumbar-back problems by puncturing Weizhong (BL 40)" in acu-moxibustion learning and to explore its underlying mechanism. METHODS: Forty volunteer sublects were asked to accept twice tests respectively, i.e., acupuncture of Weizhong (BL 40) and Yanglingquan (GB 34), for observing changes of skin blood perfusion (SBP) at the low back part of the body by using a laser Doppler perfusion imager. The whole observed area (lower back) was divided into five sub-areas, left and right areas involving Line-one and Line-two of the Bladder Meridian. RESULTS: In comparison with pre-acupuncture, SBP of both BL40 and GB34 groups increased significantly from 4 minutes' retention of needles on to 12 mm after withdrawing acupuncture needle (P < 0.01), but no significant difference was found between two groups in SBP (P > 0.05). The change rates of SBP at Line-one and Line-two of the Bladder Meridian on the same side of the stimulated Weizhong (BL 40) were significantly higher than those of Yanglingquan (GB 34) (P < 0.05), but no significant changes were found on the opposite side (both Line-one and Line-two) of the Bladder Meridian. CONCLUSION: Acupuncture of both BL4O and GB34 can increase SBP at the low back of the body (involving the Bladder Meridian) on the same side, but the changing rate of SBP of BL4O is hiaher than that of GB34.