一种医疗，特别是提供了一种用于内窥镜展开仪器（10）具有可轴向调节的电极（19）或一些其它工具部分（17），其被分配一个Axialpositioniervorrichtung（21）。 它包括滑动支撑件（22）和一个Nutensteinträger（23）设置在所述器械（10）的远端。 所述Axialpositioniervorrichtung（21）由一个组合的旋转和滑动或转动并拉动运动控制并应用多个以很小的间隙确定的不同的轴向位置的。

A medical, in particular provided for the endoscopic insertion instrument (10) has an axially adjustable electrode (19) or other tool part (17), which is assigned a Axialpositioniervorrichtung (21). This comprises a gate support (22) and a Nutensteinträger (23) disposed at the distal end of the instrument (10). The Axialpositioniervorrichtung (21) is controlled by a combined rotary and sliding or turning and pulling movement and sets a number of different axial positions fixed backlash.