PROBLEM TO BE SOLVED: To provide a high frequency treatment device comprising a base end part with a high heat resistance property for reducing a high-frequency electric current which flows into a biological tissue therefrom.SOLUTION: A high frequency treatment device comprises: a flexible tube which is inserted into a body cavity a treatment part, which is provided at a tip of the flexible tube and has an electroconductivity, for treating a biological tissue by electric conduction and an insulation member to cover the base end side of the treatment part. The treatment part is deformable during treatment. The treatment part includes a pair of holding parts and a hinge structure part to open/close the pair of holding parts. The insulation member has a space to allow a deformation of the hinge structure part when the pair of holding parts is opened and closed.COPYRIGHT: (C)2015,JPO&INPIT【課題】基端部から高周波電流が生体組織に流れることを低減し、耐熱性の高い基端部を有する高周波処置具を提供する。【解決手段】体腔内に挿入される可撓管と、前記可撓管の先端部に設けられ導電性を有し通電によって生体組織を処置する処置部と、前記処置部の基端側を覆うように設けられた絶縁部材とを有することを特徴とする高周波処置具。前記処置部は、処置の際、変形可能なものである。前記処置部は、一対の挟持部と、前記一対の挟持部が開閉可能なヒンジ構造部とを備える。前記絶縁部材は、前記一対の挟持部が開閉する際に、前記ヒンジ構造部の変形を許容する空間を有する。【選択図】図1
