Patent ID: 7371236

Claim:
A monopolar diathermic cutter comprising: a cylindrical main body member including a tip end portion, the tip end portion having electrically insulating properties; an elongated member including a central axis and a tip end projecting from the tip end portion of the main body member, the elongated member being movably inserted in the main body member; an electrode disposed on the tip end of the elongated member such that the electrode faces the tip end portion of the main body member, extending in a direction deviating from the central axis of the elongated member, and including a base-end surface disposed opposite to the tip end potion of the main body member; and an electrically insulating member with which the electrode is coated in such a manner that at least a part of the base-end surface of the electrode is exposed, wherein: the elongated member has electrically conductive properties, the electrode is electrically connected to the elongated member to form a single electrode member, and wherein the electrode extending in the direction deviating from the central axis of the elongated member includes a proximal end with respect to the central axis of the elongated member, and the proximal end of the electrode is located inward of and connected to a side surface of the electrically insulating member.