PROBLEM TO BE SOLVED: To provide a body tissue ablation device that is used in medical treatment of diagnosis, treatment or examination, etc., of a living body, and is superior in operability.SOLUTION: A cylindrical blade part 3 has a cutting edge 3A with an outer cutter so that the diameter may become smaller than the diameter d of a cutting body 3B as going to the tip. Then, 3-curved parts 4 disposed at regular intervals along a circumference are provided in the annular cutting edge 3A. The curved parts 4 are irregularities formed of an arched gentle curve along the axial direction of the cutting part 3. As a result, multiple warpage is formed on the circumference of the cutting edge 3A.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2017,JPO&INPIT【課題】生体の診断、治療又は検査等の医療に用いられる操作性に優れた体組織切除器具を提供する。【解決手段】円筒状の刃部3は、その径が先端に向かうほど刃部本体3Bの径dより小さくなるように外刃付けの刃先3Aを有する。そして、円環状の刃先3Aには、円周に沿って等間隔に配置された3つの湾曲部4を有している。湾曲部4は、刃部3の軸方向に沿って弓形状のなだらかな曲線で形成される凹凸であり、これにより刃先3Aの円周上に複数の反りが形成される。【選択図】図1
