How it works
As the physics Dalton's law, the total pressure exerted by a mixture of gases is equal to the sum of the partial pressure of the individual gases. The air we breathe is a mixture of gases, where 78% is nitrogen and 21% is oxygen (O2). This gas is conveyed to the blood flow by means of a process of diffusion, which depends on the difference of pressures of the gas between the blood capillary and the lung alveolus. The bigger the difference of pressures between both compartments, the greater the diffusion of O2 towards the blood, increasing concentration of O2.
If the atmospheric air pressure is increased to a certain proportion, the O2 pressure will increase accordingly. This is how the oxygen is conveyed to the blood flow attached to the hemoglobin (Hgb) within the red blood cells.
Under normal circumstances and inspiring air at a normal pressure, Hgb carries the 97% of the O2, so, red blood cells’ capacity of attaching to O2 is almost saturated.
When increasing the amount of O2 inspired with a mask, surrounded by a pressurized environment (Hyperbary), the O2 will "travel" diluted in the blood (Henry's law) and in any other body fluids (blood, lymph, joint fluid, cerebrospinal fluid).
This is why Hyperbaric chamber treatments helps and contribute to healing processes and make them more efficient, reducing tissue inflammation, improving the metabolic system, accelerating recovery time from injuries and post-surgery when it is combined with other treatments and preventing other illnesses.