A medical device (500), comprising: a catheter (300) that includes a first cylindrical element (306) defining a first light, the first cylindrical element having a proximal end and a distal end, the catheter having dimensions for supplying fluid from a source of fluid (314), at the proximal end, through the first light and into the hollow (108) of a hollow metal structure (100), at the distal end, and a second element (304 ) cylindrical that defines a second light that has dimensions that allow the passage of an orientation element (302) or guide wire； and, a hollow metal structure (100) and compressed with a proximal neck (116) and a distal neck (118), fixedly removable to the catheter (300), in which the hollow metal structure, when expanded, adopts a generally rounded shape, it comprises a single lobe, which has a wall (102) with an inner surface (106), which defines a hollow (108) and an outer surface (124), having an opening (112) in the wall that allows the passage of fluid from the first light into the hollow, in which the hollow of the hollow metal structure and the first light of the catheter are fluidly connected, and in which the passage of fluid from the catheter, directly into from the hollow of the hollow metal structure, it produces the expansion of the hollow metal structure, characterized in that the wall (102) comprises a metallic foil.Un dispositivo médico (500), que comprende: un catéter (300) que incluye un primer elemento cilíndrico (306) que define una primera luz, teniendo el primer elemento cilíndrico un extremo proximal y un extremo distal, disponiendo el catéter de unas dimensiones para suministrar fluido desde una fuente de fluido (314), en el extremo proximal, a través de la primera luz y hasta dentro del hueco (108) de una estructura hueca (100) metálica, en el extremo distal, y un segundo elemento (304) cilíndrico que define una segunda luz que dispone de unas dimensiones que permiten el paso de un elemento (302) de orientación o alamb
