Arrangement consisting of ureter tube, (stent) mandrin and auxiliary tube

An arrangement comprising a ureter tube having proximal and distal ends, a double mandrin having proximal and distal ends, inner and outer walls, and an outer mandrin and an inner mandrin which inner mandrin is longitudinally movable inside and relative to the outer mandrin, and an auxiliary tube having proximal and distal ends, the distal end of the auxiliary tube is in contact with the proximal end of the ureter tube, said ureter tube and auxiliary tube containing and being slidable over the outer mandrin, and said outer mandrin being releasably connected with said ureter tube by first releasable clamping means and said outer mandrin being releasably connected with said auxiliary tube by a separate second releasable clamping means, to form a functional unit of double mandrin, ureter tube and auxiliary tube, wherein both proximal end and the distal end of the ureter tube have openings and inherent curvatures and the distal end of the ureter tube has a central opening surrounded by the distal tip of the ureter tube, which distal tip has a distal face and wherein near the proximal end of the outer mandrin there are provided means for facilitating the introduction of an X-ray contrasting medium, and whereby said contrasting medium is enabled to flow through the length of said outer mandrin in a substantially rectilinear path via the open distal end of the outer mandrin and the central opening of the distal end of the ureter tube where it exits and arrangement.