The present invention relates to an implantable catheter (100) provided for insertion through a wall (50) of a dural venous sinus (70) in a subject, having a proximal (20) and distal end (30), comprising: —a tubular shaft (10) for insertion through the wall (50) of the venous sinus (70) into the sinus (52), provided with a shaft lumen (12) in fluid connection with a proximal port (14) at the proximal end and a distal port (16) at the distal end of the shaft (10), and —a stop element (40) disposed on an outer surface of the tubular shaft (10), configured to limit the depth of insertion of the tubular shaft (10) into the sinus.
