What could indicate that the airway might be blocked during CPR?

The indication that the airway might be blocked during CPR is reflected in the scenario where the person might be choking. When someone is choking, this typically implies that an object or food is obstructing the airway, which can lead to respiratory distress or failure. In a situation involving CPR, recognizing that the person might be choking suggests that any attempt to give breaths would be ineffective if the airway is not clear, thus emphasizing the importance of first addressing the obstruction before continuing with CPR efforts.

The other scenarios, such as the chest rising with breaths, responding to verbal commands, or having a steady pulse, all indicate that the airway may be intact and functioning. When the chest rises properly, it suggests that air is entering the lungs effectively. If the person can respond to verbal commands, their airway is likely clear. A steady pulse indicates blood circulation and, by extension, usually implies that the body's airway is open enough to support breathing, making it less likely that a blockage exists in such cases.