Browse categories and answer follow-up questions to refine your symptom profile.
Immediate priorities
Initial stabilization
Hazard control and decontamination
Fresh air relocation
Scene safety and carbon monoxide source control
Airway and breathing
High flow oxygen 100% via nonrebreather
If airway compromise, intubation with FiO2 1.0
Circulation
Cardiac monitor and defibrillator readiness
IV access and isotonic crystalloid for hypotension
Neurologic status
GCS trend
If seizure, benzodiazepine first line
Antidotes and special therapies
Hyperbaric oxygen eligibility screen early
If smoke inhalation, cyanide toxicity consideration
Consult and escalation triggers
Poison control and local toxicology
Hyperbaric center early contact if criteria met
ICU activation for coma, shock, refractory hypoxemia, malignant dysrhythmia
Key clinical decision points
High risk features
Altered mental status or syncope
Seizure
Chest pain or ECG ischemia
Hypotension or dysrhythmia
Severe metabolic acidosis
Pregnancy
Exposure pattern clues
Multiple patients from same environment
Symptoms improving away from source
Winter heating device or indoor combustion exposure
Pitfalls
Pulse oximetry may be normal despite poisoning
Carboxyhemoglobin level does not reliably predict severity
Delay in sampling lowers carboxyhemoglobin after oxygen administration
SymptomDx is an educational tool for medical professionals. It does not replace clinical judgment. Verify all clinical data and drug dosages with authoritative sources.