A 32-year-old man is brought to the trauma bay after a high-speed motor vehicle collision. During the primary survey, you identify severe facial trauma with airway compromise. Which feature best distinguishes a PRIMARY survey finding from a SECONDARY survey finding in this patient?

## Primary vs. Secondary Survey: Key Distinction **Key Point:** The PRIMARY survey focuses on life-threatening conditions that must be identified and managed within the first 60–90 seconds. The SECONDARY survey is a detailed, systematic head-to-toe examination performed after the patient is stabilized. ### Primary Survey (ABCDE) | Component | Focus | Timing | |-----------|-------|--------| | **A** — Airway | Patency, breathing effort, stridor | Immediate (<60 sec) | | **B** — Breathing | Chest rise, breath sounds, SpO₂ | Immediate (<60 sec) | | **C** — Circulation | Pulse, BP, perfusion, bleeding control | Immediate (<60 sec) | | **D** — Disability | GCS, pupil reactivity, gross motor | Immediate (<60 sec) | | **E** — Exposure | Undress, prevent hypothermia | Immediate (<60 sec) | ### Secondary Survey (Head-to-Toe) Performed AFTER primary survey is complete and patient is stabilized: - Detailed neurological exam (cranial nerves, motor/sensory) - Palpation of facial bones, teeth occlusion - Imaging (CT, X-rays) - Wound exploration and characterization **High-Yield:** In facial trauma, the PRIMARY survey asks: "Is the airway patent? Can the patient breathe?" The SECONDARY survey asks: "Are there fractures? Is there nerve injury?" **Clinical Pearl:** Immediate assessment of airway patency and breathing effort (option B) is a PRIMARY survey action — it must be done in the first minute. All other options (detailed neuro exam, palpation of facial bones, imaging) are SECONDARY survey components performed after stabilization. **Mnemonic:** **ABCDE** = **A**irway, **B**reathing, **C**irculation, **D**isability, **E**xposure — these are PRIMARY. Everything else is SECONDARY.