PROBLEM TO BE SOLVED: To capture an occlusive substance such as a thrombus in a thinner living body vessel part, in a guide wire used for medical treatment of the thrombus or the like.SOLUTION: This guide wire 20 includes: a root part connected with a rotating mechanism a body part 24 which is inserted into an axial-direction through-hole of a catheter 10, and is movable in the axial direction and rotatable around the axis and a tip part 28 wherein a portion of a predetermined axial-direction length is slenderly divided into a plurality of portions by slits or the like along the axial direction in an end part of the body part 24. The guide wire 20 is made of a shape-memory alloy material imparted with hyperelasticity. When the tip part 28 projects from the tip of the catheter 10, the plurality of slender division portions respectively expand in a direction perpendicular to the axial direction, and forms an expansion tip part 30 forming a predetermined envelope outline shape.COPYRIGHT: (C)2012,JPO&INPIT【課題】血栓等の治療に用いられるガイドワイヤにおいて、さらに細い生体管部において、血栓等の閉塞物質を捕捉できるようにすることである。【解決手段】ガイドワイヤ20は、回転機構が接続される根元部と、カテーテル10の軸方向貫通穴中に挿入され、軸方向に移動自在で軸周りに回転可能な本体部24と、本体部24の端部において予め定めた軸方向長さの部分が軸方向に沿ってスリット等で複数に細長く分割された先端部28と、を有し、超弾性を付与された形状記憶合金材料で構成され、先端部28がカテーテル10の先端から突き出すときに、複数の細長い分割部分が軸方向に垂直な方向にそれぞれ拡開して、予め定めた包絡輪郭形状を形成する拡開先端部30となる。【選択図】図2
