Which device delivers 6-8 L/min?

• A. Nasal Cannula
• B. Nebulizer
• C. Non-Rebreather Mask
• D. CPAP

Answer: (B)

The key idea is understanding how each device delivers oxygen or medication and the typical flow rates they rely on. A nebulizer uses a driving gas flow to turn liquid medication into an aerosol, and that driving flow is generally in the 6–8 liters per minute range. This flow is what pushes the medication mist into the lungs for absorption.

Nasal cannulas provide low-flow oxygen, usually up to about 6 L/min, and aren’t used to aerosolize medications. Non-rebreather masks are designed to deliver high concentrations of oxygen and require higher flows (often around 10–15 L/min) to keep the reservoir inflated and maintain the FiO2, not to produce aerosols. CPAP delivers continuous positive airway pressure and isn’t defined by a fixed aerosol-driving flow; it relies on pressure support rather than a standard minute-by-minute flow for medication delivery.

So, 6–8 L/min is characteristic of driving a nebulizer, making it the best fit for this question.