text: A<unk> , (POC) also called a<unk>  concentrator is a<unk>  device used to provide oxygen therapy to a patient at substantially higher concentrations than the levels of ambient air. It is very similar to a home oxygen concentrator, but it smaller in size and more mobile. The<unk>  makes it easy for patients to travel freely; they are small enough to fit in a car and most of the major concentrators are now FAA-approved.
option_0: Portable oxygen concentrator
option_1: Oxygen concentrator
option_2: Medical ventilator
option_3: Artificial respiration
option_4: Asthma spacer
option_5: Intrapulmonary percussive ventilator
option_6: Oxygen therapy
option_7: Machine perfusion