Final answer:
After confirming someone is unresponsive, remove them from any immediate dangers like water, then begin CPR if necessary while ensuring a clear airway. For conscious choking victims, assist with coughing and the Heimlich maneuver. Rapid rescue actions can lead to recovery even in severe cases.
Step-by-step explanation:
When you deduce someone is unresponsive, it's crucial to ensure a clear airway before initiating CPR or further rescue measures. In the case of drowning, you must first remove the person from the water as performing CPR while they're still submerged is ineffective. Once on stable ground, begin CPR immediately, checking for signs of choking and clearing the airway if necessary. If CPR is required, be mindful of creating the necessary gauge pressure when providing breaths, which may involve using tools like a resuscitation balloon.
For a choking victim who is conscious, encourage them to cough, apply back slaps, or perform the Heimlich maneuver to dislodge the obstruction. In the event of a choking infant, carefully administering back slaps while holding the infant in a head-downwards position may help. Always call for emergency services if the situation worsens or if you fail to clear the airway.
Remember that drowning victims who appear calm might indeed be in distress. Recognizing signs of drowning and initiating rapid rescue can still lead to full recovery, even in the event of unconsciousness due to the reflexive laryngeal spasm which might maintain a sealed airway.