Which mask allows for mixing oxygen with room air to control FiO2?

The mask that allows for mixing oxygen with room air to control the fraction of inspired oxygen (FiO2) is the Venturi mask. This device is designed to deliver a specific concentration of oxygen by utilizing different colored adapters that each correspond to a particular flow rate, thereby allowing for the precise mixing of oxygen and ambient air.

The Venturi mask uses the principle of Bernoulli’s effect; as oxygen flows through the mask, it creates a negative pressure that draws in room air via the side ports. By adjusting the flow rate of the oxygen, healthcare providers can regulate the FiO2 according to the patient's needs, which is particularly beneficial for patients requiring stable oxygenation without the risk of hyperoxia.

For the other options, the simple mask provides a variable amount of oxygen and room air, but it does not offer the same precision in controlling FiO2. The partial rebreathing mask enables some mixing with room air but is primarily designed to deliver higher concentrations of oxygen, not for precise control. The high-flow nasal cannula is capable of delivering high flow rates with a consistent FiO2, but it does so through nasal prongs, and while it provides a high level of comfort, it does not utilize the mixing principle of the