The invention relates to a surgical instrument (20), comprising a pull/push element (2) guided in a sleeve (1) for transmitting a pulling/pushing force from an actuating device (3) disposed at one end of the sleeve (1) to a loop (4) disposed at the other end of the sleeve in order to move the loop (4) from a storage position, in which the loop (4) lies in an extended manner inside the sleeve (1), into a usage position, in which the expanded opening (5) of the loop (4) is located in front of the sleeve (1), and back into the storage position, wherein the loop (4) comprises two expansion limbs (6), which in the usage position are located partially in and in front of the sleeve (1) and together have an expanded V shape and which are more flexurally rigid at least in a direction that is transverse to the opening plane (5) than a loop arc (7) connecting the respective free ends (61) of the expansion limbs to each other, and wherein the pull/push element (2) is electrically conductive. For an advantageous development, at least one first longitudinal sub-section (21) of the loop arc (7), which in the storage position is located on the one longitudinal side of the loop (4), comprises an electrically insulating sheathing (23) or consists of an electrically insulating material, and at least one second longitudinal sub-section (22) of the loop arc (7), which in the storage position is located on the other longitudinal side of the loop (4), is electrically conductive, comprises no electrically insulating sheathing and is electrically conductively connected to the pull/push element (2) by means of at least one expansion limb (6).【課題】本発明は、ループワイヤを、ループワイヤが伸長姿勢でチューブ内に収められた収容位置から、ループワイヤの展張開口がチューブの前に位置する使用位置へ移動し且つ再び戻すために、チューブの一方の端部に配置された操作ユニットから、チューブの他方の端部に配置されたループワイヤに引込/押出力を伝達するための、チューブ内で案内される引込/押出要素を備えた、外科手術用器具であって、この場合、ループワイヤが、使用位置において部分的にチューブ内およびチューブ前に位置する、両方がV形状に開脚された2つの開脚部を有し、開脚部が、少なくとも開口面に直交する方向において、開脚部の各開放端を相互に結合するループワイヤ湾曲部よりも曲げ強度が強く、およびこの場合、引込/押出要素が導電性である、外科手術用器具に関するものである。【選択
