Surgical instrument with an extendable loop made of metal wire that can be energized

A surgical instrument comprising:

• a handle and a tubular shaft with an interior and a wall made from an electrically conductive material, wherein a metallic wire is arranged in the interior of the tubular shaft, the metallic wire configured to be moved by actuation of a control element so that a loop can be extended out of a distal end of the tubular shaft, and with a switch, wherein the metallic wire can be energized by the actuation of the switch, the control element and the switch are coupled with each other so that the metallic wire is energized only in one or more defined positions of the metallic wire, wherein the control element is part of a slide and the slide has a body in which an end section of the metallic wire is held and fixed, wherein a bearing section of a contact element, which is connected in an electrically conductive way to the metallic wire, is housed in the body of the slide and a contact section of the contact element projects out from the body, so that the slide forms a control element of the switch and the contact section of the contact element forms a first switch contact of the switch.