| Summary: | 碩士 === 中國醫藥學院 === 中國醫學研究所 === 86 === In traditional Chinese medicine, syndrome of qi vacuity means that the body of patient has a low level of energy to react to stress. Recently, we used a score, namely QV score, by scaling the severity of symptoms and signs to evaluate the degrees of qi vacuity in patients with tiredness. The aim of this study is to investigate the relationship between the QV score and skin electrical conductance in patients with tiredness. One hundred and forty-three healthy controls and 103 patients with tiredness where involved. Each subject received a weak AC electrical stimulation with a constant voltage (1.75 volt) and the conductance between two different limbs was detected. The mean value of skin conductance among four limbs was calculated and expressed by a special unit, namely Chin. The correlation between the skin conductance and QV score was analyzed by a linear regression analysis.
The results show that skin electrical conductance of healthy controls negatively correlates with age (r-coefficient = -0.51, P < 0.001). The skin conductance of patients with tiredness is significantly lower than that of healthy controls with matched age (P < 0.001 by Student's t-test). Moreover, there is a positive correlation between the decrease of skin conductance and the QV score in patients with tiredness (r-coefficient = + 0.68, P < 0.001). These results suggest that decrease of skin electrical conductance may closely relate to the severity of qi vacuity . It is worth to consider using skin conductance test as a simple, reliable and quantitative method for detection of the syndrome of qi vacuity.
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