公开(公告)号：US20180110559A1

公开(公告)日：2018-04-26

申请号：US15840343

申请日：2017-12-13

Applicant: OLYMPUS CORPORATION

Inventor： Yuya HIDAKA ,  Haruki OKAMOTO

IPC: A61B18/14 ,  A61B1/00

CPC classification number: A61B18/148 ,  A61B1/00087 ,  A61B18/1492 ,  A61B2017/00269 ,  A61B2018/00029 ,  A61B2018/0016 ,  A61B2018/00982 ,  A61B2018/1475 ,  A61B2218/002

Abstract: Provided is a high-frequency treatment tool including: a sheath; an electrode member being advancable and retractable in the sheath; a distal end member disposed at a distal end of the sheath, wherein the electrode member includes a columnar portion; an electrode distal end portion provided at a distal end of the columnar portion and radially extending in an outward direction; and a stopper portion disposed at a proximal end side of the columnar portion, the stopper portion having the shape of a solid of revolution about a center axis of the electrode member, the distal end member has a tapered inner surface narrowing toward the distal end, a recessed portion is formed in a portion of the stopper portion, the electrode distal end portion has a small-diameter portion recessed in a radial direction, and the channel and the small-diameter portion are located at the same position in the circumferential direction.