Which describes a desirable feature of a bag-mask device?

• A. It is disposable and inexpensive
• B. It ensures hands-free operation
• C. It filters airborne particles
• D. It provides a higher oxygen percentage than a pocket mask with exhaled air

Answer: (D)

Delivering a higher oxygen concentration during ventilation is a key advantage of bag-valve-mask devices. When connected to an oxygen source and used with a good seal, these devices can deliver much more concentrated oxygen to the patient than a basic pocket mask that relies mostly on ambient air. With proper technique, FiO2 can reach near 100%, which helps improve oxygenation during resuscitation. The other features aren’t inherent strengths of a bag-mask system: some models are not disposable or inexpensive, hands-free operation isn’t typical because a rescuer must maintain the seal and squeeze the bag, and filtering airborne particles isn’t a primary function of the ventilation device.