The purpose of using a barrier device during rescue breathing is to

• A. improve ventilation by creating a better seal
• B. protect the rescuer from cold air
• C. prevent transmission of infections
• D. speed up the rescue breathing rate

Answer: (C)

The purpose of using a barrier device during rescue breathing is to prevent transmission of infections. A barrier device, such as a pocket mask or face shield with a one-way valve, creates a barrier between your mouth and the patient’s airway, allowing you to deliver breaths without direct contact. The one-way valve and barrier reduce exposure to saliva, mucus, and other fluids, lowering the risk of spreading germs between the rescuer and the patient. While barrier devices can help you provide ventilation, their primary function is safety and infection control, not improving the seal, accelerating breaths, or altering the air temperature.