A 32-year-old male presents to the emergency department following a motor vehicle collision with severe facial trauma and airway compromise. During the primary survey, the patient is found to be in shock with a systolic blood pressure of 85 mmHg and heart rate of 128/min. After securing the airway with rapid sequence intubation, what is the drug of choice for rapid sequence induction in this trauma patient?

Explanation

## Drug of Choice for RSI in Trauma with Shock **Key Point:** Etomidate is the induction agent of choice in hemodynamically unstable trauma patients because it maintains cardiovascular stability through sympathomimetic effects and preserved airway reflexes. ### Why Etomidate? **High-Yield:** Etomidate preserves: - Systemic vascular resistance (SVR) - Cardiac output (CO) - Airway reflexes - Cerebral perfusion pressure (CPP) These properties make it ideal when the patient is already hypotensive (SBP 85 mmHg) and tachycardic (HR 128/min), indicating compensated shock. ### Comparison of Induction Agents in Trauma | Agent | Cardiovascular Effect | Airway Reflexes | Use in Shock | |-------|----------------------|-----------------|-------------| | **Etomidate** | Maintained | Preserved | **Preferred** | | Propofol | Severe ↓ BP, ↓ SVR | Blunted | Contraindicated | | Thiopental | ↓ BP, ↓ CO | Blunted | Contraindicated | | Midazolam | Variable ↓ BP | Preserved | Slower onset, not ideal | **Clinical Pearl:** In this patient with SBP 85 mmHg, propofol would cause profound hypotension and potential cardiovascular collapse. Thiopental has similar risks. Midazolam has a slower onset and is not suitable for RSI. **Warning:** A common misconception is that propofol is safe in trauma because it is commonly used in ICU sedation — however, in the acute resuscitation phase with active shock, it is contraindicated due to its potent vasodilatory and myocardial depressant effects. **Mnemonic:** **ETOMIDATE = Excellent Trauma Option, Maintains Inotropic Drive And Tone, Excellent** (maintains hemodynamics in shock).