Oxygen Concentrator Definition: An oxygen concentrator is a medical device used to deliver oxygen to people with breathing-related disorders. People with lower-than-normal oxygen levels in their blood often need an oxygen concentrator to replace oxygen.

　　Typically, you cannot buy an oxygen concentrator over the counter. A doctor must prescribe it after completing a comprehensive medical evaluation. Doctors also often show patients how to use these concentrators effectively on the go and at home.

　　Oxygen concentrators filter the surrounding air, compress it to the desired density, and deliver purified medical-grade oxygen to the patient in a pulsed dose delivery system or continuous flow system.

　　Oxygen Concentrator It is also equipped with special filters and sieve beds that help to remove nitrogen from the air to ensure the delivery of fully purified oxygen to the patient. The devices also come with an electronic user interface so you can adjust levels of oxygen concentration and delivery settings. You then inhale oxygen through a nasal cannula or special mask.

　　You typically measure the output of an oxygen concentrator in LPM (liters per minute). Your doctor will determine the level of oxygen you need, which may vary during rest, sleep, and exercise.