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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.
Face masks that are designed to provide general anaesthesia inhalation gas to operative patients are called anaesthesia masks.[1] These masks are made of materials (anti static rubber or silicon) that are resistant to creating a spark or static electric discharge. The masks often use a Y fitting upon the mask and a double breathing hose system. One hose supplies breathing gas and oxygen from an anaesthesia machine, the other hose brings the exhaled gas back to the anaesthesia machine. These masks can be fitted with an exhalation valve and inhalation breathing bag to provide high oxygen inhalation levels for 100% oxygen breathing for carbon monoxide poisoning victims. They are fitted with 4 point head straps to provide a tight seal against the face.
