A catheter for removing material from an internal vascular passage comprising: a tubular body (8) having proximal and distal ends and a wall defining an internal passage (6), the wall has a lateral opening (6) positioned proximally of the distal end of the tubular body； a rotary trunk (20) disposed within the internal passage of the tubular body (8), a cutting element (4) coupled to the rotary trunk, the cutting element has a cutting edge (22), the cutting element and the rotating trunk are longitudinally movable within the tubular body between a storage position in which the cutting element is placed distal to the lateral opening and a cutting position in which the cutting element is contained within the internal passage of the tubular body and aligned longitudinally with the lateral opening； a cutting element exposure member (31) and a material collection chamber (12) placed inside the tubular body； characterized by； the cutting element exposure member (31) is movable longitudinally within the tubular body (8) between a distal position and a proximal position, the cutting element exposure member is configured such that the movement of the member (31) of exposure of the cutting element from the distal position to the proximal position when the cutting element (4) is in the cutting position results in a movement of the cutting element from the cutting position to an extension position in which a part of the cutting edge extends through the lateral opening (6) beyond an outside diameter of the tubular body； and wherein said material collection chamber (12) is located in a proximal location of the lateral opening.Un catéter para retirar material de un paso interno vascular que comprende: un cuerpo tubular (8) que tiene unos extremos proximal y distal y una pared que define un paso interno (6), la pared tiene una abertura lateral (6) colocada proximal del extremo distal del cuerpo tubular； un tronco rotatorio (20) dispuesto dentro del paso interno del cuerpo tubular (8
