Venturi Barrels

Each venturi barrel has a different FiO2.

The colours represent different FiO2 values, which are also printed on the barrel along with the required minimum flow rate.

Always double check you are using the correct barrel.

For patients with a respiratory rate of > 30 set the flow rate above the minimum to compensate for the increased inspiratory flow - this does not change the FiO2.

Blue

FiO2 = 24%

Flow rate: 2 - 3L/min

Blue barrel

White

FiO2 = 28%

Flow rate: 4 - 6L/min

White barrel

Yellow

FiO2 = 35%

Flow rate: 8 - 12L/min

Yellow barrel

Red

FiO2 = 40%

Flow rate: 10 - 15L/min

Red barrel

Green

FiO2 = 60%

Flow rate: 12 - 15L/min

Green barrel