PROBLEM TO BE SOLVED: To provide a new and improved electrosurgical treatment device capable of preventing a field of view from being hindered during endoscope surgery by smoke, fatty components, droplets, etc. that are generated, a control method of the electrosurgical treatment device, and an electrosurgical system.SOLUTION: An electrosurgical treatment device includes an insertion part that has a treatment part to which electric power is supplied at the tip, a power control part for controlling the electric power supplied to the treatment part, a suction passage provided to the insertion part that has an opening on the tip side of the insertion part, and a suction part for sucking liquid through the suction passage.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2017,JPO&INPIT【課題】発生する煙や脂成分、飛沫等によって内視鏡手術時の視界が妨げられることを抑制することが可能な、新規かつ改良された電気手術用処置装置及び電気手術用処置装置の制御方法並びに電気手術システムを提案する。【解決手段】電気手術用処置装置は、電力が供給される処置部を先端に有する挿入部と、前記処置部に供給する電力を制御する電力制御部と、前記挿入部に備えられ前記挿入部の先端側に開口部を有する吸引通路と、前記吸引通路を介して流体を吸引する吸引部と、を備える。【選択図】図1
