Venturi Mask

The venturi mask, also known as an air-entrainment mask (and sometimes by the brand name Ventimask®), 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. This is because venturi masks are able to provide total inspiratory flow at a specified F_iO₂ to patients therapy. The kits usually include multiple jets in order to set the desired F_iO₂ which are usually color coded. The color of the device reflects the delivered oxygen concentration, for example: blue = 24%; yellow = 28%; white = 31%; green = 35%; pink = 40%; orange = 50%. The color however varies with different brands and the user must check the instructions to determine the correct color for the desired F_iO₂. (In the UK, the colours and respective delivery concentrations are; Blue 24%, White 28%, Yellow 35%, Red 40%, Green 60%).

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.