Final answer:
In the case of a choking child becoming unresponsive, immediate emergency help should be called, and CPR should commence. Look to remove the visible object between chest compressions and administer rescue breaths. For drownings, always attempt resuscitation immediately.
Step-by-step explanation:
When a child who is choking becomes unresponsive, the appropriate management is to call for emergency medical help immediately and begin CPR (cardiopulmonary resuscitation). Ensure the child is laid flat on their back, begin chest compressions, and look for the obstructing object in between compressions. If you see the object, try to remove it without pushing it further down the airway. Do not perform blind finger sweeps. After every 30 compressions, if the child is not breathing, give two rescue breaths. Continue the cycle of chest compressions and rescue breaths until emergency services arrive or until the child begins to breathe again.
In cases where there's a drowning, the muscular spasm that seals the airway might give the impression of a sealed airway due to choking. If a child is rescued in such a state, it is essential to start CPR immediately, as there could be a chance of recovery even after extended periods of time underwater, especially in cold water.