EPISODE 5: "Swiss Cheese, ED Never Events & The Duty of Candour"

EPISODE 5: Swiss Cheese, ED Never Events & The Duty of Candour

Subtitle: Active vs. Latent Failures, the 6 Classic Resus Bay Never Events, Regulation 20, and the Dirty Dozen

Episode Overview

Patient safety and clinical governance form a massive pillar of both the MRCEM written SBA paper and the OSCE. In Episode 5, we dissect James Reason’s Swiss Cheese Model, walk through the 6 classic Emergency Medicine "Never Events" and the exact physical forcing functions that prevent them, break down the legal vs. ethical Duty of Candour, and show you how to spot the 12 human error precursors ("The Dirty Dozen") before they cause a catastrophe on your night shift.

High-Yield Clinical & Exam Takeaways

• Reason’s Swiss Cheese Model: Distinguishing Active Failures at the "sharp end" (frontline slips, lapses, mistakes) from Latent Conditions at the "blunt end" (look-alike drug packaging, rota fatigue, equipment flaws)—and why blaming the frontline clinician leaves the holes lined up for the next victim.
• The 6 Classic Emergency Medicine Never Events & Their Barriers:

1. Misplaced NG/OG Tube: Check aspirate $\text{pH} \le 5.5$ first; if no aspirate, obtain a Chest X-Ray verifying the 4-Point Criteria (bisects carina, crosses diaphragm in midline, tip below left hemidiaphragm, documented before use). Never use the "Whoosh Test" or flush an unconfirmed tube!
2. Wrong-Route Medication: Use non-Luer ENFit (purple enteral) and NRFit (yellow neuraxial) syringes.
3. Midazolam Sedation Overdose: Ban high-strength ($5\text{ mg/mL}$) midazolam vials from general ED areas; stock only $1\text{ mg/mL}$ with Flumazenil.
4. Medical Air Connected Instead of Oxygen: Remove or cap all wall Medical Air flowmeters in the ED.
5. Retained Central Line Guidewire: Mandatory two-person verbal guidewire count ("Wire out & intact") + physical tray count.
6. Wrong-Site Nerve Block / Chest Drain: Mandatory "Stop Before You Block" two-person pause confirming site mark, side, and imaging.

• Statutory Duty of Candour (Regulation 20): Triggered by Moderate Harm, Severe Harm, Prolonged Psychological Harm ($\ge 28\text{ days}$), or Death. Requires an immediate face-to-face explanation, a sincere apology ("I am deeply sorry" is NOT a legal admission of liability!), a formal written follow-up letter, and sharing the full RCA report.
• Dupont’s "Dirty Dozen" & The "HALT" Check: Recognizing fatigue ($17–24\text{ hours}$ awake $= 0.05%–0.10%$ BAC), distraction, normalized deviance, and pausing when Hungry, Angry, Late, or Tired.

Clinical Vignettes Covered

• Concentrated KCl vs. Saline Flush in Resus: Tracing a fatal arrest medication swap through three slices of Swiss Cheese.
• Stroke Patient with a Dry NG Tube Aspirate: Navigating the exact NPSA/RCEM algorithm without committing a Never Event.
• Tenfold IV Morphine Wrist-Band Mix-Up: Executing a distinction-level Duty of Candour apology to an angry relative in the OSCE.

The 3:00 AM Resus Bay Bottom Line: Never flush an unconfirmed NG tube, never use a Luer syringe for oral liquid meds, always pause to "Stop Before You Block," and when an error harms a patient, walk into the room with your senior nurse, tell the truth, and say "I am deeply sorry."