< Topic >Can use for minuteness operation the operation instrument system which is improved is offered.SolutionsIn order to be operation possible in axial method vis-a-vis the function part and the operation instrument and the function part which include the movable element, the distance which is beforehand decided from the leading edge of the drive section and the movable element which connect the movable element to the function part it possesses the point in the position where it is distant, it includes with the optical detection device which includes the optical fiber which is installed in the movable element, the optical detection device outputs the signal in order to decide the leading position of the movable element for the object which is in the midst of operating.< Selective figure >Figure 1【課題】微細手術に使用できる改善された手術器具システムを提供する。【解決手段】操作部と可動要素を含む手術器具と、操作部に対して軸方法に動作可能なように可動要素を操作部に接続する駆動部と、可動要素の最先端から予め定められた距離隔たった位置に先端を有し、可動要素に取り付けられる光ファイバを含む光学的検出装置とを含み、光学検出装置は、手術中の対象に対する可動要素の最先端の位置を決定するための信号を出力する。【選択図】図1
