Final answer:
A first aider should stop performing CPR when another trained person takes over, EMS personnel arrive and take over, or it is unsafe or the first aider is too exhausted to continue.
Step-by-step explanation:
The question at hand is asking about the specific scenarios in which a first aider should stop performing CPR (cardiopulmonary resuscitation). The correct answer is: 4) All of the above. This means that a first aider can cease CPR when:
- Another trained person takes over.
- EMS (Emergency Medical Services) personnel arrive and take over.
- The situation becomes unsafe or the first aider is too exhausted to continue.
It is crucial that first aiders are trained to properly perform CPR, as incorrect technique can cause serious harm to the patient. Additionally, CPR should be performed until either the patient recovers, help arrives, or it is no longer safe or feasible to continue.