A gas exchange unit for the processing of blood including red blood cells and plasma, the gas exchange unit being characterized by: a fluid impervious enclosure having a front face with an inlet port for the entry of the blood, and a rear face with an outlet port for the outlet of the blood, the fluid-impermeable enclosure having an interior and an exterior； and a bundle of nanotubes (2) running between the front face and the back face, each of the nanotubes (2) having a front end and a rear end, with a void (5) in the beam extending from the inlet port on the front face to the outlet port on the back face, the vacuum (5) configured to form a flow channel that is large enough to allow red blood cells to flow from the inlet port to the exit port, where the nanotubes (2) in the bundle are spaced close enough to retain red blood cells within the flow channel, yet far enough apart to allow plasma to flow through the spaces between the adjacent nanotubes (2) in the bundle, in which the nanotubes (2) are arranged with respect to the front face and the back face to allow O2 molecules to diffuse into the nanotubes (2) from outside the box and to allow molecule s of CO2 diffuse out of the nanotubes (2) to the outside of the enclosure, and in which the nanotubes (2) in the beam have defects in their walls that allow O2 molecules and CO2 molecules to diffuse through them, and the defects are present in a sufficient number and the total area, so that the gas exchange unit can effectively deliver O2 to the blood and remove CO2 from the blood.Una unidad de intercambio de gas para el procesamiento de sangre que incluye los glóbulos rojos y el plasma, caracterizándose la unidad de intercambio de gas por: un recinto impermeable a los fluidos que tiene una cara delantera con un puerto de entrada para la entrada de la sangre, y una cara trasera con un puerto de salida para la salida de la sangre, el recinto impermeable a los fluidos que tiene un interior y un exterior； y un haz de nan
