High-frequency incision tool for endoscope, has planar portion provided at tip of each blade such that each planar portion has area larger than sectional areas of blades at one portion close to front end of blades

摘要

The tool has a sheath inserted through a treatment tool guide lumen of an endoscope. A pair of electrode blades (14A, 14B) is disposed at front position of the sheath. The blades are adapted to open and close through remote manipulation of an operation unit. A planar portion (19) is provided at a tip of each blade such that each portion has a projected area larger than the cross sectional area of the blades at a portion close to the front end of the blades. A front support unit is connected to the front end of the sheath. An electrically insulating coating is attached to the tip of each blade.