Patent ID: 8858551
Filing Date: 2014-10-14
Classification: A61B

Abstract:
1. A high-frequency treatment apparatus comprising: an insertion portion having an axial direction; a covering portion provided in a distal end portion of the insertion portion and having a distal end and a proximal end; an electrode portion having a distal end and a proximal end which is provided in the covering portion, through which high-frequency current is to flow; and an operation member inserted through the insertion portion and connected to the electrode portion wherein the electrode portion is configured to be moved along the axial direction between a forward position and a backward position with respect to the covering portion by operating the operation member; wherein: the covering portion includes: a plane surface portion formed on a region including the distal end of the covering portion and extending in the axial direction, and a placement portion on the plane surface portion, which has a concave groove being concave with respect to the plane surface portion, the concave groove extending in the axial direction, the electrode portion is configured to move in the axial direction in a state that a part of the electrode portion is near the concave groove of the placement portion to the plane surface portion and is housed in the placement portion and the electrode portion includes: a distal end treatment portion formed at the distal end of the electrode portion, the distal end treatment portion distally protruding from the distal end of the covering portion with the axial direction of the insertion portion when the electrode portion is arranged in the forward position, and being arranged between the distal end and the proximal end of the covering portion with the axial direction of the insertion portion when the electrode portion is arranged in the backward position; and a side treatment portion provided at a proximal side of the distal end treatment portion and extending parallel with the axial direction, a widely directionally inner side portion of the side treatment portion being housed in the placement portion and a widely directionally outer side portion of the side treatment portion protruding outwardly with respect to the plane surface portion.