North Carolina EMT State Practice Exam

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What flow rates can a Venturi mask deliver?

  1. 15, 20, 25, 30 percent

  2. 24, 28, 35, 40 percent

  3. 30, 40, 50, 60 percent

  4. 50, 60, 70, 80 percent

The correct answer is: 24, 28, 35, 40 percent

The Venturi mask is specifically designed to deliver precise concentrations of oxygen to patients who require respiratory support. It achieves this through the Venturi effect, which allows the mixing of ambient air with inspired oxygen, providing a consistent oxygen concentration with specific flow rates. Typically, the flow rates that a Venturi mask can deliver range from approximately 24% to 40% oxygen concentration. This accuracy in oxygen delivery is crucial for managing patients with various respiratory conditions, such as chronic obstructive pulmonary disease (COPD), where controlling the oxygen supply is essential to avoid complications. In this case, the choice providing flow rates of 24, 28, 35, and 40 percent corresponds with the established specifications for Venturi masks, underscoring their role in delivering controlled oxygen therapy effectively.

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