Final answer:
The chance of survival increases significantly if CPR is started within 3-5 minutes of collapse, and prompt action with proper technique is essential for increasing the probability of recovery following a cardiac arrest or drowning incident.
Step-by-step explanation:
The probability of survival for a person who starts receiving CPR within 3-5 minutes of collapse is significantly higher than if CPR is delayed. It is crucial for brain function, as irreversible damage and death of neurons can occur within minutes of loss of blood flow. The effectiveness of CPR, especially when initiated promptly, is apparent in scenarios involving drowning where a victim's airway may still be sealed due to a muscular spasm of the larynx, affording them a good chance of full recovery if CPR is commenced quickly. Notably, children have been known to survive prolonged periods of submersion in cold water with minimal lasting effects, emphasizing the importance of commencing resuscitation efforts even after an extended period. Proper technique and prompt action are key, as CPR must be performed correctly to be effective and to minimize injury to the patient.
Given these considerations, it is evident that the chance of recovery following sudden cardiac arrest or drowning can be enhanced by immediate and properly administered CPR.