A catheter system for inserting a self-expanding stent into a bodily vessel. The catheter (1) has a movable sleeve (30), which holds the self-expanding stent in the space (2) when being positioned in the bodily vessel. As the self-expanding stent is released, the sleeve is pushed back by means of the application of fluid to the balloon (20). Here, the movable sleeve (30) can be moved proximally or distally in a precise manner by adjusting the pressure ratio in the balloons (20, 23). A controlled release and renewed capture of the self-expanding stent are possible accordingly.
