The patient may need to use oxygen therapy for only a few hours, or they may need to use oxygen around the clock. In most systems, oxygen flows through thin tubes that end just inside the nose. For many patients, having a supply at home is necessary. Oxygen supplies come in heavy metal tanks. Small portable tanks can be carried while shopping or eating and may last a few hours.
Pure oxygen is a fire hazard.
It does not burn itself, but it makes any fire burn faster and hotter. Keep flammable items away from the oxygen supply. Examples of such items include alcohol, aerosol sprays, solvents, perfumes, and petroleum products. Keep oxygen away from sources of flames, sparks, or high heat. Examples include cigarettes, other smoking items, radiant heaters, and certain appliances.