The primo vascular system is the substance of meridians.

Abstract Background; The primo vascular system (PVS) is new circulatory system. However, the primo vascular system doesn’t achieve now on the valuation criteria on the substance of meridians, so that anyone can't prove that the primo vascular system is the substance of meridians. Objectives: The purpose of this study is to prove clinical-physiologically that the primo vascular system is the substance of acupuncture meridian.Methods: Meridian-like high thermal line (MLHTL) induced by the mineral pulse light stimulus on acupoints, and nephrotic syndrome treated simultaneously without any drug use, were researched and analyzed. Next, the inducing characteristic of meridian-like high thermal lines and, anatomic and electro-physiologic characteristic of PVS were researched and analyzed. Results: The KI, SP meridian-like high thermal line coinciding completely along the classic KI, SP meridian course, were induced by the mineral pulse light stimulus on SP6 acupoints, and simultaneously nephrotic syndrome in kidney, the internal target organ connected along KI meridian from the KI3, SP6 acupoints, was treated without any drug use. And the primo vascular system was basis tissue of MLHTL inducing. Conclusions: The primo vascular system was achieved completely to the valuation criteria on the substance of meridians. Thus, the primo vascular system is the substance of meridians.