Endoprosthesis and catheter IMPROVED

The invention relates to a self-expandable stent (30) comprising a tubular body (40), said tubular body having - two open ends, - at least one polymer layer and an alloy layer, - at least one lateral opening (45 ) of said puncture, and - at least one shutter element (49) of said opening, said shutter being at least in part, said side opening being - adapted to allow a penetration of said tubular body, - arranged at a predetermined distance from each of said ends, and - arranged in the alloy layer, said sealing member being arranged in the polymer layer.