To blunt the SNS response to laryngoscopy when using etomidate, which may be required?

To blunt the SNS response to laryngoscopy when using etomidate, which may be required?

• A. Lidocaine
• B. Opioid or esmolol
• C. Vasopressor
• D. Fentanyl only

Answer: (B)

Blunting the sympathetic response to laryngoscopy focuses on preventing the catecholamine surge that raises heart rate and blood pressure during airway stimulation. Etomidate is cardiovascularly stable, but the laryngoscopy itself can still trigger significant sympathetic output. To minimize this effect, you can give an opioid or a short‑acting beta-blocker. Opioids provide analgesia and dampen the reflex sympathetic activation, reducing tachycardia and hypertension. Esmolol, a very short-acting beta-1 blocker, directly limits heart rate and blood pressure during intubation with rapid offset, which is useful when precise control is needed. While lidocaine may help with airway reflexes to some extent, its hemodynamic protective effect is less consistent. A vasopressor would counteract the goal of blunting the SNS response, and saying “fentanyl only” is too narrow because beta-blockade can be an equally effective alternative.

Blunting the sympathetic response to laryngoscopy focuses on preventing the catecholamine surge that raises heart rate and blood pressure during airway stimulation. Etomidate is cardiovascularly stable, but the laryngoscopy itself can still trigger significant sympathetic output. To minimize this effect, you can give an opioid or a short‑acting beta-blocker.

Opioids provide analgesia and dampen the reflex sympathetic activation, reducing tachycardia and hypertension. Esmolol, a very short-acting beta-1 blocker, directly limits heart rate and blood pressure during intubation with rapid offset, which is useful when precise control is needed. While lidocaine may help with airway reflexes to some extent, its hemodynamic protective effect is less consistent. A vasopressor would counteract the goal of blunting the SNS response, and saying “fentanyl only” is too narrow because beta-blockade can be an equally effective alternative.