ERcast: Clinical Perspectives Podcast Preview
The summary below is from an episode of ERcast: Clinical Perspectives
Procedural sedation in the emergency department is safest when it starts with patient selection, monitoring, and choosing the right drug for the procedure. Waveform end-tidal CO2 is a key early warning tool, and many common sedatives provide no analgesia at all.
Procedural Sedation Core Principles
- Early sedation commitment: Procedural sedation often improves workflow and patient experience when painful reductions or repairs are recognized early, rather than after a prolonged, traumatic attempt without adequate control.
- Waveform capnography priority: Waveform end-tidal CO2 is the most important monitoring adjunct because it detects hypoventilation before pulse oximetry lags, a distinction worth hearing in the episode.
- Essential team setup: Safe sedation starts with continuous SpO2, ECG, frequent blood pressure checks, IV access, oxygen, suction-ready airway equipment, and enough staff to separate airway watch from the procedure.
- Analgesia versus anxiolysis: Propofol, midazolam, and etomidate do not treat pain, so matching the agent to the procedure matters as much as achieving sedation depth.
- ASA risk boundary: ASA class 3 or higher should trigger caution because comorbidity increases sedation risk and may push the case toward anesthesia support or a more controlled setting.
Medication Selection and Practical Decisions
- Ketamine sweet spot: Ketamine is a strong choice for short painful procedures because it provides both dissociation and analgesia while generally preserving airway reflexes and hemodynamics.
- Propofol reduction use: Propofol is useful when deeper sedation and muscle relaxation help a reduction succeed, but hypotension and respiratory depression remain its headline liabilities.
- Etomidate limitation: Etomidate is fast on and fast off, but fasciculations and muscle tightening make it a weaker fit for many orthopedic reductions.
- NPO timing reality: Recent oral intake is a consideration, but aspiration risk correlates poorly with strict NPO times in many emergency scenarios. We get into the real-world tradeoffs in the chapter.
- Solo sedation pragmatism: Solo procedural sedation may still be reasonable in rural or understaffed settings if nursing and respiratory support are strong and vigilance is uncompromising.
- Alternatives before sedation: Regional anesthesia and non-opioid analgesia should be considered before sedation when they can control procedural pain with less physiologic risk.
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References:
- Kern J, Guinn A, Mehta P. Procedural sedation and analgesia in the emergency department. Emerg Med Pract. 2022;24(6):1-24. PMID: 35616493
- Chawla N, Boateng A, Deshpande R. Procedural sedation in the ICU and emergency department. Curr Opin Anaesthesiol. 2017;30(4):507-512. PMID: 28562388
- Falk J, Zed PJ. Etomidate for procedural sedation in the emergency department. Ann Pharmacother. 2004;38(7-8):1272-1277. PMID: 15173551
Faculty
- Andy Little, DO
Dr. Andy Little is an emergency medicine physician and educator. He earned his medical degree from the Ohio University Heritage College of Osteopathic Medicine and completed his emergency medicine residency at OhioHealth Doctors Hospital Emergency Medicine Residency, where he served as Chief Resident. He has received multiple national awards, including recognition from the American Osteopathic Association, American College of Osteopathic Emergency Physicians, and Emergency Medicine Residents' Association.
- Steven Haywood, MD
