PROBLEM TO BE SOLVED: To prevent large displacement bending that occurs at the sheath tip by a basket wire.SOLUTION: A medical basket type treatment instrument having a basket portion using a metal wire, wherein at least one cross-sectional shape of the wire constituting the basket portion is quadrilateral shape having an inner side facing the internal space of the basket portion, a right side continuous to the right of the inner side, a left side continuous to the left of the inner side, and an outer side that is the opposite side of the inner side, and the inner side has a sharp portion protruding in the direction of the internal space at least at both ends, the right side and the left side have a linear shape, and the length of the inner side is shorter than the length of the outer side.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2020,JPO&INPIT【課題】バスケットワイヤがシース先端部で起きる大きい変位の曲げを防止する。【解決手段】金属製のワイヤを用いたバスケット部を有する医療用バスケット型処置具であって、前記バスケット部を構成するワイヤの少なくとも１本の断面形状が、前記バスケット部の内部空間に面する内辺と、前記内辺の右に連なる右側辺と、前記内辺の左に連なる左側辺と、前記内辺の対辺である外辺と、を有する四辺形状であり、前記内辺は、少なくとも両端に、前記内部空間の方向に突出した尖り部を有し、前記右側辺及び前記左側辺は直線形状であり、前記内辺の長さは、前記外辺の長さより短い。【選択図】図１
