Total liquid ventilation system and method

A total liquid ventilation system configured to deliver a breathable liquid to the lungs of a mammal, the total liquid ventilation system comprising an inspiratory circuit, an expiratory circuit, and a breathable liquid treatment unit, the breathable liquid treatment unit comprising:

• a gas injection system configured to inject a gas mixture into the breathable liquid, so as to obtain a two-phase mixture;
• a heat exchange system configured to heat and/or cool the two-phase mixture, the heat exchange system comprising:
• a backing device configured to provide mechanical support;
• at least one plate configured to be at a controlled temperature;
• and
• a bag located in between the at least one plate and the backing device, the bag comprising at least two opposite surfaces, a fluid inlet fluidly connected to the expiratory circuit, and a fluid outlet fluidly connected to the inspiratory circuit;
• a pumping system comprising a pump for circulating the two-phase mixture from the fluid inlet to the fluid outlet through a fluid duct;
• and
• the backing device, the at least one plate, and the bag being configured to define the fluid duct extending between the fluid inlet and the fluid outlet of the bag, the fluid duct having a length which is larger than the distance between the fluid inlet and the fluid outlet.