High-frequency electrosurgical treatment instrument for operations and high-frequency electrosurgical system for operations

A high-frequency electrosurgical system for operations, comprising:

• a pair of forceps pieces including grip surfaces opposed to each other to grip an affected area, the forceps pieces being capable of being opened and closed relative to each other;
• an insulating member disposed at proximal end portions of the forceps pieces and insulates one of the forceps pieces from the other forceps piece;
• a transmission member coupled to one of the forceps pieces such that one of the forceps pieces and the other forceps pieces are pivotably coupled to each other;
• a manipulation rod member including a distal end portion and a proximal end portion, the distal end portion being fixed to the transmission member;
• a distal end cover member including a fulcrum that pivotably couples with one of the forceps pieces;
• a shaft member into which the manipulation rod member is inserted to cover the manipulation rod member so as to wrap the manipulation rod member from the distal end portion to the proximal end portion, the shaft member being inserted into a body cavity together with the manipulation rod member;
• a manipulation portion including a movable handle removably coupled to the proximal end portion of the manipulation rod member and a fixed handle removably coupled to a proximal end portion of the shaft member;
• a flow channel portion formed between the manipulation rod member and the shaft member in a radial direction of the shaft member, the flow channel portion being disposed along a longitudinal direction of the manipulation rod member, when the manipulation rod member is inserted into the shaft member, to allow liquid to flow;
• a groove portion that communicates with the flow channel portion and is disposed along the longitudinal direction of the manipulation rod member on an outer peripheral surface of the distal end cover member to allow the liquid to flow from the flow channel portion;
• an opening portion that communicates with the groove portion to supply the liquid near the proximal end portions of the pair of forceps pieces;
• a connector including a return electrode that electrically conducts with one of the forceps pieces and an active electrode that electrically conducts with the other forceps piece;
• a liquid conveyance unit that conveys the liquid toward the flow channel portion;
• and
• a power supply electrically connected with the connector to supply power to the forceps pieces.