Which description correctly defines a Non-rebreather mask in oxygen delivery?

Which description correctly defines a Non-rebreather mask in oxygen delivery?

• A. A facial mask with a reservoir bag attached.
• B. A large facial mask held in place by hand and connected to an Ambu-bag used to manually inflate the patient's lungs
• C. A plastic mask placed over the nose and mouth.
• D. A plastic tube placed into the nostrils.

Answer: (A)

Delivering high-concentration oxygen relies on a face mask that has a reservoir bag attached. This bag fills with oxygen and is available for you to breathe from, while exhaled air exits through one-way valves or side ports so it doesn’t mix back into the bag. That setup lets the patient inhale largely fresh oxygen, achieving a higher FiO2 than a plain mask. The described option matches this because it mentions a facial mask with a reservoir bag attached, which is the defining feature of a non-rebreather mask. Other options point to different devices: a manual bag-valve mask used for assisted ventilation, a simple mask without a reservoir, or a nasal cannula.

Delivering high-concentration oxygen relies on a face mask that has a reservoir bag attached. This bag fills with oxygen and is available for you to breathe from, while exhaled air exits through one-way valves or side ports so it doesn’t mix back into the bag. That setup lets the patient inhale largely fresh oxygen, achieving a higher FiO2 than a plain mask.

The described option matches this because it mentions a facial mask with a reservoir bag attached, which is the defining feature of a non-rebreather mask. Other options point to different devices: a manual bag-valve mask used for assisted ventilation, a simple mask without a reservoir, or a nasal cannula.