Clinically, some patients often ask: instead of hyperbaric oxygen, can I use ordinary oxygen inhalation instead? Therefore, it is necessary to understand the difference between ordinary oxygen inhalation and hyperbaric oxygen. Oxygen is transported in the blood in two forms: chemically combined and physically dissolved, and both ordinary oxygen inhalation and hyperbaric oxygen can saturate chemically combined oxygen. But because the atmospheric pressure is different when absorbing oxygen, the physical dissolved oxygen increases significantly in the case of hyperbaric oxygen, and at the same time, hyperbaric oxygen absorbs 100% pure oxygen, while the concentration of ordinary oxygen can only reach 30-50%, so when absorbing hyperbaric oxygen, the physical dissolved oxygen can increase several times, at this time, the distance of oxygen diffusion in the tissue increases significantly, and the high efficiency relieves hypoxia, and at the same time, hyperbaric oxygen will have other effects on the function of various systems of the body, which is also the This is the physiological basis of hyperbaric oxygen therapy. Therefore, general oxygen inhalation cannot replace hyperbaric oxygen.