<p>A catheter (11) for directing biliopancreatic secretions comprises an elongate tubular wall (16) extending between a proximal end portion (12) and a distal end portion (13) and having an internal surface (17) which defines a fluid passage channel (18), a sweeping grid (19) arranged inside the fluid passage channel (18) and adapted to be moved with respect to the tubular wall (16) thereby sweeping the internal surface (17), actuating means (20) which move the sweeping grid (19) with respect to the tubular wall (16).</p>
