Lit Matters 2: Dexmedetomidine versus propofol

Ketamine-based procedural sedation is effective in the ED, but the choice of co-agent changes recovery time and physiologic tradeoffs. In adults undergoing painful procedures, ketofol and ketodex both outperformed ketamine alone, while propofol delivered the fastest return to baseline.

Ketamine Combinations for Procedural Sedation

• Head-to-head trial design: A double-blind randomized ED trial compared ketamine alone with ketofol and ketodex in 135 adults needing procedural sedation, giving the results more bedside credibility than usual PSA anecdote.
• Recovery time advantage: Ketofol produced the shortest recovery, about 8 to 10 minutes faster than ketodex or ketamine alone, which matters when throughput and discharge readiness are part of the sedation plan.
• Induction time tradeoff: Ketodex had a longer induction than ketamine alone, while looking similar to ketofol on time to procedural readiness, a nuance we get into in the episode.
• Rescue dosing burden: Ketamine alone needed more rescue ketamine and more midazolam for recovery agitation, reinforcing that combination regimens were smoother and more effective than monotherapy.
• Respiratory event signal: Ketodex showed a smaller early SpO2 drop, but apnea, laryngospasm, and bag-valve-mask use still appeared in that arm, so no regimen looked complication-proof.
• Hemodynamic profile: Combination sedation blunted ketamine’s usual tachycardic and hypertensive push, while dexmedetomidine carried some transient hypotension that responded to fluids without major downstream instability.