Syndrome differentiation of six channels theory, tri-Jiao theory and defensive qi and nutrition blood theory are three differentiation methods of exogenous disease which are independent, complementary and overlapping to each other. The three theories caused great difficulties in learning and using. It is necessary to carry out their consolidation and unification. Based on the analysis of pathogenesis and syndrome of three theories, it was found that syndrome differentiation of exogenous disease were fundamentally following syndrome differentiation of viscera and channels theory. Based on syndrome differentiation of viscera and channels and differentiation of syndrome elements, the three differentiation theories could be unified. At the same time, the advantages and characteristics of the three differentiation methods for exogenous disease should be kept.%六经辨证、三焦辨证和卫气营血辨证是中医外感病的三种辨证方法,这三种方法相互独立、互相补充又互有重叠,给学习和运用造成了较大困难,有必要对其进行整理和统一.通过对三种方法的病机及证候进行分析,认为外感病的辨证实质上就是脏腑经络辨证.基于脏腑经络理论,运用证素辨证统一中医外感病辨证方法的同时,还应注意延续和保持各种外感病辨证方法的优势和特色.
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