A portable car (40) for containing medical waste, in which the car (40) includes: a mobile base (44)； a frame (50) fixed to the base (44) that is located above the base (44), in which the frame (50) has an outer surface and an opening, the frame (50) is shaped to retain, of removable, a bag (54) so that the bag (54) is kept open inside the opening of the frame； and a bag tensioner (900) mounted on the frame (50), wherein said bag tensioner (900) has at least one member (912) mounted on the frame (50) that is adapted to engage a part of the bag (54) extending over the outer surface of the frame (50) so that at least a part of the bag (54) is placed in tension around a section of the outer surface of the frame (50), in which said portable carriage is characterized in that said bag tensioner (900) also includes: at least one first bolt (910) centrally mounted to a base plate (904) that is adapted to be in rotational contact with the frame (50) in a fixed location, in which a first part of the periphery (51) of the bag (54) must be routed around the at least one first bolt (910)； and wherein the at least one member of the bag tensioner (900) is a bag capture part (912) that is mounted on said base plate (904) and extends outwardly therefrom to rotate around said at least a first bolt (910), and a second part of the periphery (51) of the bag (54) must be placed around the part (912) of capture the bags, in which said part (912) of capture of the bag is located relative to said at least one first bolt (910) so that the movement of the bag capture part (912) with the second part of the periphery (51) of the bag (54) mounted on the It places the first part of the periphery (51) of the bag (54) when it is routed around the at least one first bolt (910) in tension around the at least one first bolt (910) so that the periphery (51) of the bag (54) is tensioned around the frame (50).Un carro (40) portátil para contener residuos médicos, en el que el carro (40) incluye: una base
