Oxygen masks serve as a medium to transfer stored oxygen gas to the lungs of a patient. Oxygen masks are of two types – oral nasal mask which only covers the nose and mouth and the full face mask which covers the entire face. The use of oxygen masks is indicated for patients with chronic obstructive pulmonary disorders like emphysema and chronic bronchitis. Oxygen masks are usually made of materials like plastic, silicone and rubber. Plastic oxygen masks are usually disposable and hence reduce the costs of disinfection and contamination associated risks. Silicone and rubber masks are heavier than plastic masks and provide a good seal for long term use. A simple oxygen mask consists of a head strap, a body shell or dome, exhalation and inhalation ports. The oxygen mask is attached by a tube to the oxygen source like an oxygen cylinder. Oxygen occurs naturally in the room at 21% but additional oxygen might be required for a medical treatment.
Styles of Oxygen Masks
There are various styles of medical oxygen masks. Some of them are:
1. Simple Facemask
It is the most common style of oxygen mask but the oxygen concentration delivered might be diluted
2. Venturi Mask
Venturi masks use a mechanical vent which increases the rate of flow of oxygen
3. Non-Rebreather mask
This type of oxygen mask allows 60%-90% of the oxygen to be delivered
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