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?

Question

Accepted Answer

A. Etomidate. ## 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).

Answer

B. Propofol

Answer

C. Midazolam

Answer

D. Thiopental

Explanation

Drug of Choice for RSI in Trauma with Shock

Why Etomidate?

Comparison of Induction Agents in Trauma

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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