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Portable oxygen concentrator
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<p>A portable oxygen concentrator (POC) is a device used to provide <a href="/facts/Oxygen_therapy/38BdReab">oxygen therapy</a> to people that require greater oxygen concentrations than the levels of ambient air. It is similar to a home <a href="/facts/Oxygen_concentrator/E3VF7Uwc">oxygen concentrator</a> (OC), but is smaller in size and more mobile. They are small enough to carry and many are now <a href="/facts/Federal_Aviation_Administration/PYsXt3YT">FAA</a>-approved for use on airplanes. </p>