Monitored Care That Slipped - Anesthesiology clinical simulation case. You are the attending anesthesiologist providing monitored anesthesia care in an...
Age: 45 • Setting: Outpatient Consultation
Clinical Presentation & History
You are the attending anesthesiologist providing monitored anesthesia care in an ambulatory dermatology suite. Margaret, a 62-year-old retired librarian, is undergoing wide local excision of a 1.4 cm basal cell carcinoma on her nasal bridge. She received midazolam 2 mg IV and fentanyl 50 mcg IV in divided doses over 15 minutes for sedation and analgesia. Her sedation level was initially at a Modified Observer's Assessment of Alertness/Sedation (MOAA/S) score of 4, responsive to verbal prompts. Suddenly, after a bolus of 25 mcg fentanyl for the second injection of local anesthetic by the surgeon, the circulating nurse alerts you. You approach the head of the bed.
Differential Diagnoses to Consider
Primary differential diagnoses evaluated in this clinical scenario:
Iatrogenic Over-Sedation with Transition from MAC to General Anesthesia and Partial Upper Airway Obstruction
Anaphylactic Reaction to Midazolam with Bronchospasm
Acute Cerebrovascular Accident during sedation
Local Anesthetic Systemic Toxicity (LAST) from infiltrated lidocaine
High-Yield Clinical Pearls
Maintain a systematic approach from history taking to definitive intervention.
Diagnostic stewardship minimizes patient harm and diagnostic delay.
Diagnostic Pitfalls & Cognitive Error Warnings
Key reasoning traps and premature closure risks associated with this presentation:
Premature closure without complete investigation carries high diagnostic error risk.
Test Your Clinical Reasoning in Real Time
Step into the active clinician role for this case. Order diagnostic tests, analyze live laboratory panels, and navigate branching clinical decisions with real-time feedback.