What is the typical sequence of events in general anesthesia induction?

• A. Preoxygenation; induction with IV agent (e.g., propofol); analgesia (opioid); neuromuscular blockade; airway management; maintenance with anesthetics.
• B. Induction with IV agent; preoxygenation; analgesia; airway management; neuromuscular blockade; maintenance with anesthetics.
• C. Preoxygenation; analgesia; induction with IV agent; airway management; neuromuscular blockade; maintenance with anesthetics.
• D. Preoxygenation; induction with IV agent (e.g., propofol); analgesia; airway management; neuromuscular blockade; maintenance with anesthetics.

Answer: (A)

The sequence aims to safely transition from awake to surgically anesthetized with controlled oxygenation, unconsciousness, pain control, and a secured airway. Preoxygenation fills the lungs with high-concentration oxygen so the patient has a better reserve during the inevitable brief apnea that occurs when ventilation is interrupted. Then an IV induction agent, like propofol, rapidly makes the patient unconscious. Providing analgesia with an opioid at this stage helps blunt the body’s stress response to subsequent airway manipulation and provides intraoperative pain control. Next, a neuromuscular blocker is given to achieve muscle relaxation, which facilitates smooth airway management and keeps the patient immobile during the procedure. Airway management—usually endotracheal intubation or other airway control—is then performed to secure the airway. Finally, anesthesia is maintained with ongoing anesthetic agents to continue unconsciousness and analgesia for the duration of the surgery.