Work carried out for Dr O.Castagna, doctor-researcher on the theme of pulmonary oedema during immersion (Resident Operational Underwater Research Team (ERRSO) in Toulon).

The aim of this work was to show the influence of the equipment used by the diver on both the respiratory and circulatory systems. The three comparative states presented correspond to the normal state (at rest), then the control situation, with a diver using "classic" equipment, and finally a diver using a "rebreather", an experimental material.