<unk> s are considered high-flow oxygen therapy devices. This is because<unk> s are able to provide total inspiratory flow at a specified FiO2 to patients therapy. The kits usually include multiple jets, which are usually color-coded, in order to set the desired FiO2. Other brands of masks have a rotating attachment that controls the air entrainment window, affecting the concentration of oxygen. This system is often used with air-entrainment nebulizers to provide humidification and oxygen therapy. The mechanism of action is usually incorrectly quoted as depending on the<unk>  effect. Despite there being no evidence for this, many textbooks and journal articles cite this as the mechanism. However, a fixed performance oxygen delivery system, despite often being called a<unk>  works on the principle of jet mixing.
Venturi mask
Gas mask
N95 respirator
Oxygen mask
Pocket mask
Nasal cannula
Oxygen tent
Elastomeric respirator