In what situation is performing CPR on a child most crucial?

Performing CPR on a child is most crucial when the child is unresponsive and not breathing. In this scenario, the child's heart may have stopped or their breathing has ceased, which means they are experiencing a life-threatening emergency. An unresponsive child requires immediate intervention to restore breathing and circulation, which is the primary goal of CPR.

In cases where the child is sleeping, conscious and alert, or simply upset and crying, their airway may not be compromised, and they are not in immediate danger. These situations do not require CPR, as the child is either stable or can be calmed down without the need for resuscitation efforts. When a child is unresponsive and not breathing, the rapid initiation of CPR can make a significant difference in their chances of survival and recovery.