This paper presents the studies on the fifteen collaterals from 7 aspects : difference between the fifteen collaterals and twelve divergent meridians ; difference between the fifteen collaterals and the branches of the meridians ; position where the fifteen collaterals going into their interiorly - exteriorly related meridians ; making up of the fifteen collaterals ; fifteen collaterals or sixteen collaterals ; the luo - connecting point of the ren meridian ; the treatment effect of the fifteen collaterals 从十五络脉与十二经别的区别、十五络脉与经脉分支不同、十五络脉别入表里经位置考、十五络脉组成考、十五络脉与十六络脉辨、任脉络别出位置辨、十五络脉的治疗作用等7个方面对十五络脉进行了辨析。
