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An illustration of one of the techniques by which HFOT can be administered, showing a nasal cannula device, which consists of an air–oxygen blender, allowing for FiO2 ranging from 0.21 to 1.0 and a flowmeter that generates up to 60 L/min flow. The gas is then humidified and heated in the active humidifier and heater and is delivered via the heated breathing circuit to the patient (i.e., through a soft wide-bore nasal cannula).
