Abstract: A multilumen catheter (1) of a type comprising two inner lumens (2, 3) defined by a wall (2A, 3A) for guiding a fluid (4), and two opposite ends (5, 6), namely a distal end (5) and a proximal end (6), characterized in that the distal end is formed of two elongated and discrete end portions (13, 14) located beyond a so-called dividing point (12) at a predetermined distance D1 from the proximal end (6), wherein said end portions, in a rest position of the catheter, extend parallel to the longitudinal axis thereof, each over a predetermined length (L1, L2) measurable between a free end (13A, 14A) and the dividing point (12), are each made of a flexible material, contain a segment of at least one lumen (2, 3) and have at least one channel (7, 8) for delivering and/or sampling the fluid.