Wiktionary
n. therapeutic administration of oxygen.
Wikipedia
Oxygen therapy is the administration of oxygen as a medical intervention, which can be for a variety of purposes in both chronic and acute patient care. Normal air is composed of 20.95% oxygen by volume; it is essential for cell metabolism, and in turn, tissue oxygenation is essential for all normal physiological functions.
High blood and tissue levels of oxygen can be helpful or damaging, depending on circumstances. Oxygen therapy is used when low blood oxygen is present. Oxygen may be administered in various ways from a nasal cannula to hyperbaric oxygen inside a closed chamber.
Usage examples of "oxygen therapy".
Long ago and far away before that damned Eugenics Board ruling, I was planning to have Sheena take hyper-baric oxygen therapy during the pregnancy .
Pressure is regulated and there's automatic oxygen therapy when his system needs a jolt.
We'll continue with hyperbaric oxygen therapy twice a day, and I recommend total parenteral nutrition.