The venturi mask, also known as an air-entrainment mask, is a medical device to deliver a known oxygen concentration to patients on controlled oxygen therapy. Venturi masks are considered high-flow oxygen therapy devices, similar as non-rebreather mask. This is because venturi masks are able to provide total inspiratory flow at a specified FiO2 to patients therapy. In order to set the desired FiO2, the kits usually include multiple jets/dilutors, which are usually color-coded. Another type of venturi mask has 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. As a contrast, standard oxygen mask isn’t able to deliver O2 gas at a certen and accurate concentration.