ELECTROSURGICAL INSTRUMENT FOR ARGON-PLASMA COAGULATION, AND A METHOD FOR OPERATING SAME

摘要

The invention relates to an electrosurgical instrument for argon-plasma coagulation, and to a method for operating such an electrosurgical instrument. The electrosurgical instrument comprises an instrument shaft having an inner cavity (111, 211, 311) and a distal end section (120, 220, 320, 420) with a distal opening (130, 230, 330, 430), and an electrode (140, 240, 340) arranged in said cavity, wherein a shape and/or diameter of the distal opening is made to be variable.