Oxygen therapy includes both normobaric oxygen therapy and hyperbaric oxygen therapy. Atmospheric oxygen therapy: The process of inhaling oxygen at one atmosphere to treat a patient’s disease is called atmospheric oxygen therapy. Hyperbaric oxygen therapy: The process of inhaling 100% oxygen at a pressure higher than one atmosphere to treat a disease is called hyperbaric oxygen therapy. There is an essential difference between hyperbaric oxygen and normobaric oxygen: 1. The partial pressure of oxygen in the blood is much higher than that of normobaric oxygen when inhaling hyperbaric oxygen. Please see the following different oxygen inhalation methods oxygen partial pressure: (1) nasal catheter oxygen, nasal plugs oxygen, ordinary single tube mask oxygen (these three are our common daily oxygen inhalation methods): oxygen partial pressure is 220-300 mmHg, (2) atmospheric pressure closed mask oxygen (this is our department’s atmospheric pressure oxygen inhalation method): oxygen partial pressure is 760 mmHg. (3) hyperbaric oxygen: at present, our department applies two hyperbaric oxygen therapy Atmospheric pressure inhalation of pure oxygen, oxygen partial pressure: 1520 mmHg. Hyperbaric oxygen therapy oxygen partial pressure is 7 times higher than normal oxygen therapy under atmospheric pressure! 2, oxygen absorption under hyperbaric oxygen, oxygen partial pressure is very high, can produce strong enough penetration, reserve, dissolution, antibacterial effect, and the regulation of the whole body systems. 3.For some special diseases, such as gas embolism, gas gangrene, decompression sickness, carbon monoxide poisoning, etc., the therapeutic effect of hyperbaric oxygen is impossible to be achieved by normobaric oxygen therapy and drug treatment. Therefore, it is not possible to achieve the therapeutic effect of hyperbaric oxygen therapy with normobaric oxygen therapy.