Answer :
Final answer:
An infant rescue breath is considered effective when the chest rises visibly, indicating that the lungs are being properly inflated with air. This increases the chance of survival, especially after submersion in water.
Explanation:
The rescuer knows the rescue breath for an infant victim is effective when the chest rises visibly. This is a sign that air is entering the lungs, rather than the stomach, which is crucial for efficient breathing and oxygenation. When providing rescue breaths, a visible rise in the infant's chest indicates that the breaths are inflating the lungs as intended. The chest rise is a more reliable indicator compared to the other options like the stomach visibly rising, complete compression of the child ventilation bag, or hearing an air leak around the mask, which are not as directly related to successful respiration. In providing immediate care, especially in cases where infants have been underwater, timely and effective rescue breathing can be crucial for survival.
