Final answer:
The reasonable timeframe for considering cessation of resuscitation efforts is approximately 20-30 minutes.
Step-by-step explanation:
The timeframe for considering cessation of resuscitation efforts can vary depending on the specific circumstances. However, it is generally accepted that resuscitation efforts may be discontinued if there is no return of spontaneous circulation after approximately 20-30 minutes of aggressive and appropriate resuscitation measures.
It is important to note that this timeframe may be shortened in certain situations, such as when advanced cardiac life support interventions have been in progress prior to arrival at the hospital, or if there is evidence of irreversible injury or non-survivable condition.
Ultimately, the decision to cease resuscitation efforts is made by medical professionals, taking into account various factors such as the patient's underlying condition, the success of resuscitation efforts, and the overall prognosis.