Patent attributes
An endoscopic high-frequency knife includes an insulating flexible sheath, a conductive wire inserted into the insulating flexible sheath, and a high-frequency cutting electrode. The high-frequency cutting electrode is installed in the endoscopic high-frequency knife so that an outer surface of the high-frequency cutting electrode is exposed at a side surface of the insulating flexible sheath in the vicinity of an end thereof. The conductive wire is electrically connected with the high-frequency cutting electrode. The insulating flexible sheath includes a distal portion and a proximal portion which are separated from each other. The distal portion and the proximal portion are freely rotatable relative to each other. A portion of the conductive wire in the vicinity of an end thereof is fixed to the distal portion to thereby prevent the distal portion from separating from the conductive wire even if the high-frequency cutting electrode breaks.
