Oxygen therapy is a method of therapeutic use of air enriched with activated oxygen molecules in a special apparatus. The procedure has a local specific effect on the respiratory system itself, reduces the manifestations of hypoxia, and indirectly affects all organs and systems of the body, reducing the manifestations of oxygen starvation. This procedure has proven itself positively in the treatment complexes of diseases of the cardiovascular system, diseases of the upper respiratory tract (laryngitis, tracheitis, bronchitis), as well as in rehabilitation regimens after pneumonia and severe infections.