Catheter device having a catheter and an actuation device

A catheter device, comprising:

• a catheter having a proximal end and a distal end;
• a blood pump, comprising:
• a rotor, and
• a housing enclosing the rotor, the housing coupled to the distal end of the catheter;
• a cap surrounding the catheter and configured to at least partially enclose the blood pump in a compressed state;
• a coupling element surrounding the catheter and coupled to the cap such that the cap may rotate around the catheter independent of the coupling element;
• a fixing element surrounding the catheter;
• a flexible drive shaft having a proximal end and a distal end, wherein the catheter surrounds the flexible drive shaft;
• one or more cables each having a proximal end and a distal end, the distal end of each of the one or more cables being coupled to the coupling element, and the fixing element being configured to be coupled to the proximal end of each of the one or more cables,
• a conversion element coupled to or integrated with the cap, the conversion element being configured to convert translational movement of the coupling element relative to the catheter at least partially into a rotational movement of the cap relative to the catheter.