INTRAVENOUSLY IMPLANTED METAL ALLOY STENT AND A NEW METHOD FOR THE PRODUCTION OF THIS STENT

The invention is related to a permeable, tubular metal alloy stent, which is placed intravenously and ensures continuity of flow inside the vessel at necessary rate by being expended by a certain extent just after the placement, wherein Fe-Mn-X-Y alloy is used for producing biodegradable stents, X contains at least one elements selected from the group that is composed of Si, Co, Mo and Y contains at least one elements selected from the group that is composed of C and Pd., in such alloy Fe is characterized as 47-75%, Mn is 20-35%, Si is 1-6%, Co is 1-4%, Mo is 1-4%, C is 1-2% and Pd is 1-2% by weight. The invention is a method of production of a permeable, tubular metal alloy stent, which is placed intravenously and ensures continuity of flow inside the vessel at necessary rate by being expended by a certain extent just after the placement, wherein - the production is performed with 3D printer, - a laser source with 200-400 W power is used during production, - powders forming the alloy are laid properly on a tray inside the production pool, - the laser source is located stationary at mid-top point of the tray and in a way that it is distant from the tray at focal length, - mirrors are used for ensuring directing laser beams into desired point, - process steps contain scanning of each layer by directing laser beams by means of mirrors during production and combining them in a manner that desired geometry is achieved mean powder size is 5-20 microns, laser power is 200-400 W, scanning rate is 10 m/s - 20 m/s, diameter of laser beam is between 80 µm - 150 µm and layer height is between 20 µm - 200 µm during the production and argon or nitrogen gas is used as a protective atmosphere during production. L'invention se rapporte à un stent en alliage métallique tubulaire perméable, qui est placé par voie intraveineuse et assure la continuité du flux à l'intérieur du vaisseau à une vitesse nécessaire en étant dilaté selon une certaine mesure juste après le placement. Un alliage Fe-Mn-X-Y est utilisé pour produire des stents biodégradables, où X contient au moins un élément choisi dans le groupe constitué de Si, Co, Mo et Y contient au moins un élément choisi dans le groupe constitué par C et Pd. Dans ledit alliage, Fe est caractérisé en ce qu'il est présent à un taux de 47 à 75 %, Mn à un taux de 20 à 35 %, Si à un taux de 1 à 6 %, Co à un taux de 1 à 4 %, Mo à un taux de 1 à 4 %, C à un taux de 1 à 2 % et Pd à un taux de 1 à 2 % en poids. L'invention concerne un pr