Abstract: A catheter (1) includes an elongated member (2) having a proximal end (4) and a distal end (3). An inflatable balloon (5) is arranged on the elongated member in an area of the distal end thereof, the balloon extending from a distal position (6) to a proximal position (7). The elongated member includes an inner lumen (8) extending from the distal end to an end position (9) which is proximal to the balloon. The inner lumen is open at the distal end. The catheter further includes a duct (12) connected to the proximal end and to the balloon at the proximal position. The duct defines a separate lumen to convey a fluid to and from the balloon.

Abstract: 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.