What is hypebaric oxygen therapy?
In hyperbaric oxygen therapy, a person is placed in an hyperbarci oxygen chamber, where the air pressure is raised significantly higher than that of regular environment. As a result, many times more oxygen reach the tissues of the body.
Why is the pressure important? Think about making a lemonade for a moment. If you just blow into the water, the bubbles won't stay there. A higher pressure is needed to dissolve the gas in the liquid. In making the lemonade, pressure is used to dissolve carbon dioxide in the liquid and have a tasty drink as a result. The same happens in the hyperbaric oxygen chamber - under pressure, the oxygen in the air dissolves in body fluids and reaches every cell in many times larger quantities than usual.

In a normal state, oxygen is carried throughout the body by red blood cells, which are usually at least 96% or more saturated with oxygen. Thus, by administering oxygen, we can increase oxygenation by only a few percentage points. However, under pressure, oxygen dissolves in all body fluids, including blood plasma, which does not normally carry oxygen. The amount of oxygen in the body increases significantly, and the pressure pushes it deeper into the tissues.
Oxygen is the most important nutrient for the functioning of every cell. It revitalizes all cells, whether in the body or the brain, and makes them work effectively again.
If there are damaged areas in the body, then the fine capillary network on the micro level, which carries oxygen and nutrients to the problem areas, has been destroyed in those places. The result is a poorer ability to heal. Repeated successive sessions of hyperbaric oxygen therapy, which push oxygen deep into the damaged tissues, grow back the fine capillary network and restore the normal oxygen supply.
For example, in the case of brain problems, often the nerve cells are not completely dead, but are in a non-functioning and dormant state. Oxygen helps to restart cell work, and the renewed capillary network makes these parts of the brain work consistently again with a good supply of nutrients.