An implant for percutaneous implantation through the abdominal wall for encircling and engaging an externalized length of a body duct of a human or animal patient. The implant has an exterior tubular section defined by an circumferential exterior wall at least a part of which is adapted to protrude outwardly from the abdominal wall with a free end for mounting of a detachable device, an interior section defined by an circumferential interior wall adapted to extend through the abdominal wall and inside the patient for internal fixation of the implant, wherein the exterior tubular section and the interior section have a common axis A. The circumferential exterior wall of the exterior tubular section and the circumferential interior wall of the interior section are arranged axially spaced apart at a distance D from each other to provide an axial gap between opposing free ends of the exterior tubular section and the interior section, with the exterior tubular section and interior section being connected inside the sections.