Instrument for surgical purposes

Instrument for surgical purposes, in particular for coagulation, comprising at least one electrode member (2, 31), wherein the at least one electrode part having a control unit (12) electrically connectable to electrical contact regions to act on nearby tissue located (13) by electrical actuation of the having contact area and the contact area of doped diamond for establishing the electrical conductivity consists, characterized in that the dopant concentration of the contact region is higher than 5 × 10