NREMT Paramedic Practice

Which of the following is a feature of a Venturi mask?

1. Delivers 40-70% oxygen concentration

2. Is used exclusively for pediatric patients

3. Provides precise regulation of FiO2

4. Delivers 10-15 L/min flow rate

The correct answer is: Provides precise regulation of FiO2

A Venturi mask is designed to provide precise regulation of the fraction of inspired oxygen (FiO2) due to its unique mechanism of operation. It works by utilizing a principle of physics known as the Venturi effect, in which air is mixed with oxygen at a controlled rate. This allows a specific FiO2 to be delivered, which can be adjusted by changing the color-coded adapters that represent different oxygen concentrations. This feature is particularly important for patients with respiratory conditions who require consistent and accurate oxygen levels, making it a preferred choice in clinical settings where controlling the oxygen concentration is critical for patient safety and treatment efficacy. Understanding this function underscores why precise regulation of FiO2 is integral to the use of a Venturi mask in managing patients' respiratory support needs or those with complex oxygen requirements. While the mask can deliver a range of oxygen concentrations and is used in various patient populations, its hallmark feature is the ability to accurately control oxygen delivery, distinguishing it from other oxygen delivery systems.