Headache in a Closed Garage - Emergency Medicine clinical simulation case. A 34-year-old male brought from a closed residential garage where he had been...
Age: 34 • Gender: Male • Setting: Emergency Triage
Clinical Presentation & History
A 34-year-old male brought from a closed residential garage where he had been troubleshooting a gasoline generator for approximately two hours. He is confused, complains of a pounding frontal headache, and reports nausea and one episode of vomiting. Pulse oximetry on the monitor reads 99% on room air, but the team notes he appears markedly cherry-red and is intermittently drowsy.
Acute Resuscitation Milestones & Priorities
Clinical phases and key interventions encountered in this emergency module:
Scene Recognition & Exposure Decontamination
Tissue Hypoxia & Cardiac Stress
Refractory Confusion & Seizure Threshold
Definitive Disposition & Public Health
High-Yield Clinical Pearls
Standard pulse oximetry cannot distinguish oxyhemoglobin from carboxyhemoglobin because both absorb strongly at 660 nm; co-oximetry (4-wavelength) is required to detect CO.
ACEP hyperbaric oxygen indications: COHb > 25% (> 15% in pregnancy), loss of consciousness, neurologic deficits, seizure, GCS < 9, cardiovascular instability, age > 55 with coronary disease.
Fetal hemoglobin binds CO with even greater affinity than adult hemoglobin and fetal CO half-life is prolonged; pregnancy with even modest COHb is a relative HBO indication.
Generator exhaust in enclosed spaces is the most common cause of non-fire-related CO poisoning in the United States; public health reporting and prevention education are essential.
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.