What Is the Difference Between Nasal Cannula and Face Mask

A nasal cannula consists of a flexible tube that is placed under the nose. The tube includes two prongs that go inside the nostrils. A face mask covers the nose and mouth. Both methods of delivery attach to oxygen sources, which come in a variety of sizes.

Is an oxygen mask better than a cannula?

Apart from the physical differences of each device, the primary difference is that face masks allow higher concentrations and rates of flow of oxygen. A simple face mask can deliver oxygen concentrations from 40 to 60% at flow rates between 10 to 12LPM.

What percentage of oxygen is delivered by a simple face mask?

Simple masks deliver oxygen concentrations of between 40% and 60%. Flow rates for simple masks should not be below 5 L/min as the patient could easily breathe in air that has not been flushed from the mask.