Portable gas exchange device

A portable gas exchange device for gas exchange of at least one gas with a fluid, comprising:

• a housing configured to be transported on a patient's body, the housing enclosing an internal chamber;
• a first gas exchange section for passage of a first fluid, the first fluid being gaseous;
• a second gas exchange section for passage of a second fluid comprising liquid enriched with a first gas, wherein the second fluid has a lower or higher concentration of the first gas than the first fluid;
• a pumping system disposed entirely in the internal chamber of the housing, the pumping system comprising a first gas pump for pumping the gaseous first fluid through the first gas exchange section and a second pump for pumping the second fluid through the second gas exchange section;
• a mixing chamber disposed entirely in the internal chamber of the housing, the mixing chamber having a wall which is permeable at least to the first gas, the first gas exchange section and the second gas exchange section disposed in the mixing chamber and adjoining one another, separated by the wall;
• and
• an active temperature control having at least one temperature sensor arranged in the internal chamber of the housing, at least one ventilating fan, and a governor device, the active temperature control configured to maintain a temperature in the internal chamber of the housing in a range of 34 to 42 degrees Celsius.