Medical high frequency coagulation cutting instrument

Medical radio frequency coagulation-cutting instrument comprising an instrument shaft (11) having a proximal end provided with first and second stationary coagulation electrodes (12, 13) and a movable cutting electrode (14);

• and an actuating head (19) arranged at a distal end of the instrument (11) and including a fixed head part (20) and a head part (21) which is movable relative thereto, wherein a relative movement of the two head parts (20, 21) is transmitted to the cutting electrode (14) wherein the coagulation electrodes (12, 13) and also the cutting electrode (14) lead via radio frequency supply lines (15, 16, 17), which are insulated relative to one another in the instrument shaft (11), to a cable connection (18) provided at the distal end for connection to a radio frequency supply device, and wherein the radio frequency supply device has at least two switch positions, in one of which the cutting electrode (14) is switched off and the coagulation electrodes (12, 13) are energized with a radio frequency coagulation current and in the other of which at least one of the coagulation electrodes (12, 13) is connected as a neutral electrode and a radio frequency voltage which enables a cutting arc is applied to the cutting electrode (14) and the neutral electrode, characterized in that the radio frequency supply lines for the first and second coagulation electrodes (12, 13) are conductive tubes (15, 16) arranged within one another, the radio frequency supply line for the cutting electrode (14) being arranged inside the conductive tubes in an insulated manner as an axially directed conductive bar (17) axially movable through the actuating head (19).