title: [Experimental verification of "treating lumbar-back problems by puncturing Weizhong (BL 40)" with blood perfusion imaging technique].
abstract: 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.
  
  
  CONCLUSIONS
  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.
authors: Institute of Acu-Moxibustion, China Academy of Chinese Medical Sciences, Beijing.
authors: Ling-ling
authors: LL
authors: Wang
authors: Wei-bo
authors: WB
authors: Zhang
authors: Heng-hui
authors: HH
authors: Xie
authors: Yu-ying
authors: YY
authors: Tian
authors: Yi-hui
authors: YH
authors: Xu
mesh_terms: D015670:Acupuncture Therapy; D000328:Adult; D000368:Aged; D005260:Female; D006801:Humans; D017078:Laser-Doppler Flowmetry; D017116:Low Back Pain / Q000628:therapy*; D008161:Lumbosacral Region; D008297:Male; D008875:Middle Aged; D012039:Regional Blood Flow; D012867:Skin / Q000098:blood supply*