In what instance should a lifeguard perform CPR?

Performing CPR is critical in situations where a person is unresponsive and not breathing, as these are key indicators of cardiac arrest or respiratory failure. In such scenarios, immediate action is required to restore blood circulation and oxygenation to vital organs, significantly increasing the chances of survival. CPR involves chest compressions and rescue breaths, which are designed to maintain blood flow to the heart and brain until medical personnel arrive or the individual regains consciousness and normal breathing.

Other scenarios mentioned, such as when a swimmer is sunburned, has a cut, or is hyperventilating, do not warrant CPR. Sunburn does not affect a person’s breathing or responsiveness, cuts require first aid but not CPR, and hyperventilation, while serious, typically involves a different set of management techniques that do not include CPR. Thus, the correct instance for performing CPR specifically focuses on the absence of responsiveness and breathing.