title: [Volt-ampere characteristics of Yuan points of three yin channels of hand in women before, during and after menstruation].
abstract: OBJECTIVE
  To observe the changes of volt-ampere characteristics of Yuan-Primary acupoints in women before, during and after menstruation, and to find out the relationships between Qi-blood in human body and volt-ampere characteristics of acupoints, so as to develop a new method for quantitative analysis on changes of Qi-blood.
  
  
  METHODS
  A high-sensitive detection system of volt-ampere characteristics of acupoint was applied to detecting the volt-ampere characteristics of Taiyuan (LU 9), Daling (PC 7) and Shenmen (HT 7) in healthy women before, during and after menstruation.
  
  
  RESULTS
  The resistances on LU 9, PC 7 and HT 7 with some certain scan currents were quite different among the women before, during and after menstruation. For such changes, PC 7 was of the most obvious change, LU 9 was of the less and HT 7 was of the least. The total ratio of the scanning spots with significantly increasing changes of resistances on these three acupoints along with the menstrual process was 70.6%.
  
  
  CONCLUSIONS
  The volt-ampere characteristics of acupoints vary with the menstrual process, which is of the acupoint specificity. The resistances on the acupoints increase with the menstrual process, and such results may be due to the blood loss during menstruation. The volt-ampere characteristics can be used as a quantitative index to study on the change of Qi and blood.
authors.affiliation: College of Acupuncture, Moxibustion and Tuina, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China.
authors.forename: Jian-Zi
authors.initials: JZ
authors.lastname: Wei
authors.forename: Ai-Mei
authors.initials: AM
authors.lastname: Zhang
authors.forename: Xue-Yong
authors.initials: XY
authors.lastname: Shen
authors.forename: Yu
authors.initials: Y
authors.lastname: Zhou
authors.forename: Ling
authors.initials: L
authors.lastname: Zhao
authors.forename: Yu
authors.initials: Y
authors.lastname: Zhou
mesh_terms: D015669:Acupuncture Points; D000328:Adult; D017097:Electric Impedance; D004594:Electrophysiology; D005260:Female; D006801:Humans; D008598:Menstruation / Q000502:physiology*; D016740:Meridians