Electrosurgical cutting, coagulating and suction instrument

摘要

An electrosurgical instrument that combines cutting, coagulating and suctioning functionality in a single hand-held instrument. The instrument provides a combination suction-coagulation device that can selectively deliver electrical energy through either a blunt suction coagulation end or a "sharp" needle or blade end and a convenient means for a surgeon to alternate between these two modalities. A cooling medium in a sealed cavity may be incorporated either (i) as a heat-pipe within one side of electrode wall around the suction lumen, (ii) as a second coaxial lumen within the circumscribing electrode wall, (iii) in an adjacent but thermally coupled heat-sink pipe attached either external or internal to (but not fully occluding) the suction lumen, or (iv) in a heat-pipe far proximal to the electrode ring but thermally coupled.