Why should a barrier device be used with rescue breaths?

Using a barrier device with rescue breaths is essential primarily to protect against infectious disease. These devices create a physical barrier between the rescuer and the victim, effectively minimizing the risk of transmitting airborne pathogens or bodily fluids that could lead to the spread of infections. In situations where a rescuer must perform mouth-to-mouth resuscitation, the risk of exposure to diseases such as HIV, hepatitis, or other infections becomes a significant concern.

Barrier devices are designed to be used easily and provide a safe way to deliver necessary breaths without direct contact, thus ensuring the safety of both the rescuer and the victim. The importance of this practice stems from the knowledge that many emergency situations occur in environments where the victim might have communicable diseases, making infection control a priority in first aid scenarios.

While the other options may address various aspects of CPR, such as facilitating air movement or dealing with vomiting, they do not capture the primary function of barrier devices as effectively as the focus on infection prevention does.