Oxygen concentrator are less portable than the others options. An oxygen concentrator is a device that takes oxygen from the room, concentrates it for therapeutic use, and removes other naturally occurring gases. The benefits of concentrators are that they are less expensive and don’t require filling like tanks.Portable versions are available. However, most models are too large to be truly portable.Oxygen is distributed from the tank through a tube. It enters the lungs nasal tubes, a face mask, or a tube inserted directly into the person’s wind pipe..

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