When performing CPR, which of the following is critical to check first?

When performing CPR, the first critical step is to check the airway. The airway must be clear to ensure that air can flow in and out of the lungs. If the airway is obstructed, even if a person has a pulse or is breathing, they could be at risk of asphyxiation or further complications.

Checking the airway also sets the stage for further assessment and interventions. If the airway is blocked, no effective rescue breaths can be given, and the chances of survival without immediate correction are significantly reduced. Thus, ensuring that the airway is clear is vital before moving on to assess breathing, pulse, or consciousness. This sequential approach is emphasized in CPR protocols to maximize the chances of a successful resuscitation.