Oxygen therapy means using an oxygen tank or a machine to breathe in air that contains more oxygen than normal.
Oxygen therapy increases the amount of oxygen in the lungs and the bloodstream. A person with a health problem such as chronic obstructive pulmonary disease (COPD) may need oxygen therapy if there is an indication that the cells of the body are not getting enough oxygen.
Oxygen therapy may be given by different methods, including a:
WebMD Medical Reference from Healthwise