To prevent gastric inflation during rescue breathing, it is important to:

Delivering each breath over a duration of 1 second is essential because it allows time for the air to properly enter the lungs without causing excessive pressure. When breaths are given too quickly or forcefully, it can lead to air entering the stomach instead of the lungs, a condition known as gastric inflation. This complication can hinder effective ventilation and increase the risk of regurgitation, which can further complicate the rescue efforts.

In contrast, methods such as forcefully blowing air into the lungs increase the likelihood of gastric inflation, as they can introduce air faster than the body can accommodate. Waiting for the chest to rise before giving another breath helps ensure that the first breath was effective, but it does not address the prevention of inflation directly. Giving rapid breaths may seem like a way to provide more oxygen but can contribute significantly to the risk of air entering the stomach if not done with the appropriate timing. Thus, the most effective approach to preventing gastric inflation is to deliver each breath over a controlled duration of 1 second.