PROBLEM TO BE SOLVED: To provide a mandrel around which a primary coil is wound to form a complicated three-dimensional secondary winding, wherein workability in the winding is superior, the coil position after the winding is also stabilized, the subsequent control and the handling in the heat treatment are facilitated, and further, even when the primary coils intersect with each other in a complex three-dimensional shape, partial bending and deformation of the coils in the intersection can be avoided or mitigated, and to provide a method for manufacturing an in-vivo indwelling member using the same.SOLUTION: A mandrel is used for winding a primary coil 11 and forming a secondary winding of an in-vivo indwelling member. Steps 60a, 60b are provided in a predetermined position where the primary coil 11 passes by winding, and notch grooves 61a, 61b for receiving the primary coil 11 are provided in the steps 60a, 60b.SELECTED DRAWING: Figure 5COPYRIGHT: (C)2017,JPO&INPIT【課題】一次コイルを巻き付けて複雑な立体的二次形状の付与が可能であると同時に、巻き付けの際の作業性が良好で、巻き付け後のコイルの位置も安定し、その後の管理や加熱処理をする場合の取り扱いも容易となり、さらに複雑な立体形状で一次コイル同士が交差する場合も当該交差部分でコイルが局部的に屈曲変形することを回避ないし緩和することができるマンドレルやこれを用いた生体内留置部材の製造方法を提供せんとする。【解決手段】一次コイル11を巻き付けて生体内留置部材の二次形状を形成するために用いられるものであり、巻き付けにより一次コイル11が通過する所定の位置に段差部60a,60bを設けるとともに、該段差部60a,60bに一次コイル11を受け入れる切欠き溝61a,61bを設けた。【選択図】図5
