An oxygen mask provides a method to transfer breathing oxygen gas from a storage tank to the lungs. Oxygen masks may cover the nose and mouth (oral nasal mask) or the entire face (full-face mask). They may be made of plastic, silicone, or rubber.In certain circumstances, oxygen may be delivered via a nasal cannula instead of a mask.
Medical plastic oxygen masks are used primarily by medical care providers for oxygen therapy because they are disposable and so reduce cleaning costs and infection risks. Mask design can determine accuracy of oxygen delivered with many various medical situations requiring treatment with Oxygen. Oxygen is naturally occurring in room air at 21% and higher percentages are often essential in medical treatment.
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