What action should be taken if a choking infant becomes unresponsive?

When an infant who is choking becomes unresponsive, it is crucial to start CPR immediately. This action is vital because an unresponsive infant cannot breathe or effectively clear the obstruction on their own, which could lead to a lack of oxygen and serious consequences if not addressed promptly.

Performing CPR helps to keep blood circulating and provides oxygen to vital organs. Additionally, while performing CPR on an unresponsive infant, you should also ensure that emergency help is called, as professional medical intervention is necessary for further evaluation and treatment.

The other options involve actions that are not suitable once the infant is unresponsive. For instance, initiating back blows or abdominal thrusts is appropriate for a responsive infant who is choking, but once they lose consciousness, these methods are no longer effective or safe. Waiting for the infant to regain consciousness is dangerous, as it can lead to life-threatening conditions. Therefore, starting CPR and calling for emergency help is the most appropriate and life-saving response in this scenario.