Patent attributes
The invention relates to an electrosurgical instrument comprising two limbs that have an articulated connection and that can be actuated in the manner of a cutting or clamping tool. The instrument includes opposing electrode parts with coagulation surfaces on distal ends of its limbs for holding a vessel or tissue and for passing a current through said vessel or tissue to coagulate the latter and also current supply devices that supply the coagulation current from a high-frequency generator to the electrode parts. One of the coagulation surfaces is convex, at least in a first central section, and the opposing coagulation surface is concave, at least in a second central section. The radius of curvature of the concave coagulation surface is greater, at least in the second central section, than the radius of curvature of the convex coagulation surface in the first central section. The curvatures run along longitudinal axes of the distal ends in such a way that a vessel or tissue that is held between the distal ends runs perpendicularly to the longitudinal axes and is retained with a pressure that increases towards the first and second central sections.
