What are the three stages of anesthesia?

• A. Induction, maintenance, and emergence
• B. Preparation, induction, and awakening
• C. Preoperative, intraoperative, postoperative
• D. Awake, asleep, recover

Answer: (A)

The three stages of anesthesia are induction, maintenance, and emergence. Induction is the transition from wakefulness to anesthesia, typically achieved with intravenous or inhaled agents and often followed by securing the airway. Maintenance keeps the patient in a controlled, adequate depth of anesthesia throughout the surgery, with stable physiology. Emergence is the process of waking the patient as the anesthetic wears off, with return of consciousness and airway reflexes.

Other options describe perioperative periods or states rather than the clinical phases of anesthesia itself, so they don’t align with the standard three-stage framework.