Lit Matters 1: Safety of procedural sedation in the ED

Emergency department procedural sedation has no single safest agent; adverse events cluster by drug rather than yielding one clear winner. In adult ED PSA, hypoxia is the most frequent complication, and capnography detects more respiratory events than pulse oximetry alone.

Procedural Sedation Safety Signals

• No universal safest agent: RCT-only adult ED data showed no medication dominated overall safety; each sedative carried a distinct complication pattern, so agent choice should match the procedure and patient rather than chase a single 'best' drug.
• Hypoxia as leading event: Hypoxia was the most common adverse event at about 105 per 1000 sedations, while severe events needing immediate intervention remained uncommon across the pooled ED literature.
• Propofol hemodynamic tradeoff: Propofol stood out for hypotension at roughly 55 per 1000 sedations, reinforcing its familiar blood-pressure liability even when its procedural conditions are otherwise attractive.
• Ketamine mixed profile: Ketamine had the lowest hypoxia signal at about 21 per 1000 sedations but a much higher agitation and vomiting burden, a tradeoff worth hearing in the episode.
• Midazolam respiratory concern: Midazolam alone carried the highest hypoxia and apnea estimates, including hypoxia above 200 per 1000 sedations, which supports moving away from benzodiazepine-only sedation when better options are available.
• Capnography reveals more events: Studies using end-tidal CO2 reported more hypoxia and apnea, suggesting capnography finds subclinical respiratory compromise earlier rather than making sedation less safe. We get into that monitoring nuance in the episode.