Patent ID: 6929643

Claim:
A resectoscope apparatus comprising: a high-frequency power generating unit which generates high-frequency power for treating the anatomy; a first electrode which supplies to the anatomy, the high-frequency power generated by the high-frequency power generating unit; a solution supply unit which supplies a conductive solution around the electrode; and a second electrode which is arranged in the conductive solution supplied by the solution supply unit and which returns the high-frequency power supplied to the anatomy from the first electrode, wherein the first electrode has two parallel lead members, and a treatment electrode connected to an edge of the parallel lead members, and when a first segment is in parallel with the plane on which the parallel lead members exist and has the maximum width of the treatment electrode and a second segment is vertical to the first segment and has the maximum distance between an intersection to the first segment and an intersection to the treatment electrode, a length a of the first segment and a length b of the second segment satisfy a relationship of (a>2·b).