Ketamine vs Etomidate for Induction in Status Epilepticus

Rationale for Ketamine as Preferred Agent

Ketamine is the preferred induction agent for intubation in status epilepticus, while etomidate should be avoided due to lack of anticonvulsant properties and concerns about adrenal suppression in critically ill patients 1
Ketamine maintains hemodynamic stability through sympathomimetic properties, which is critical in critically ill seizure patients who may be hemodynamically compromised 2, 1

Pediatric critical care guidelines explicitly recommend against etomidate use in critically ill children, particularly those with septic shock, due to adrenal suppression even after a single dose 3
The American College of Critical Care Medicine states that even one dose of etomidate for intubation is independently associated with increased mortality in children and adults with septic shock, possibly secondary to inhibition of adrenal corticosteroid biosynthesis 3
While adult RSI guidelines suggest no mortality difference between etomidate and other induction agents in general critically ill populations, these studies did not specifically examine status epilepticus patients who may have additional metabolic stress 4

The American College of Critical Care Medicine recommends using ketamine with atropine premedication for sedation and intubation in pediatric septic shock, explicitly avoiding etomidate 3
Ketamine maintains cardiovascular stability through intact adrenal axis function and reduces systemic inflammatory responses, making it superior in critically ill patients 3

Administer ketamine 1-2 mg/kg IV as the induction agent, followed immediately by a neuromuscular blocking agent (succinylcholine 1-1.5 mg/kg or rocuronium 1.0-1.2 mg/kg) 2, 1
Consider using the lower end of the ketamine dose range (1 mg/kg) in patients with cardiovascular compromise to minimize hemodynamic effects while maintaining adequate sedation 1
Atropine premedication (0.01-0.02 mg/kg) may be considered to prevent increased salivation, particularly in pediatric patients 3

Never administer the neuromuscular blocking agent before the sedative-hypnotic (ketamine), as this causes awareness during paralysis, which occurs in approximately 2.6% of emergency department intubations 2
Do not use etomidate in pediatric status epilepticus patients or those with suspected sepsis/septic shock due to adrenal suppression concerns 3
Have vasopressors immediately available, though ketamine's sympathomimetic properties typically maintain hemodynamic stability better than other induction agents 2, 1