Non-Rebreather Oxygen Mask

The non-rebreather mask covers both the nose and mouth of the patient and attaches with the use of an elastic cord around the patient's head. The NRB has a 1 liter attached reservoir bag that connects to an external oxygen tank. Before an NRB is placed on the patient, the reservoir bag is inflated to greater than two-thirds full of oxygen, at a rate of 15 liters per minute (lpm). Approximately one-third of the air from the reservoir is depleted as the patient inhales, and it is then replaced by the flow from the O2 supply. Exhaled air is directed through a one-way valve in the mask, which prevents the inhalation of room air and the re-inhalation of exhaled air. The valve, along with a sufficient seal around the patient's nose and mouth, allows for the administration of high concentrations of oxygen, approximately 60% - 80% O2.

Type: First Aid

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