In what scenario should you deliver a breath to ensure chest rise?

Delivering a breath over 1 second is the appropriate approach in Basic Life Support (BLS) to ensure visible chest rise during rescue breaths. This duration allows for the proper inflation of the lungs without causing excessive pressure or volume, which could potentially lead to complications such as gastric inflation or rupture of the lungs. Achieving visible chest rise is crucial because it indicates that air is effectively entering the lungs, ensuring adequate oxygenation of the patient.

When breaths are given too quickly, such as over a shorter duration than 1 second, the air may not have enough time to fill the lungs adequately. Conversely, taking longer than 1 second could result in delivering too much air and pressure, which might compromise the patient's airway or trigger a gag reflex. Therefore, the 1-second guideline strikes the right balance to promote effective ventilation and chest expansion in emergency situations.