CEN — Emergency Nursing
CEN Trauma Emergencies Review
Trauma resuscitation is a choreography the CEN tests through prioritization: a systematic primary survey that finds and fixes life threats in order, decisive hemorrhage control, and recognition of the injuries that kill quickly (tension pneumothorax, massive hemorrhage, increased ICP). The exam rewards nurses who can run the algorithm under pressure and resist being distracted by dramatic but non-lethal injuries.
This guide reviews the trauma primary survey, hemorrhage and shock, patterned injuries, and special-population considerations with CEN-style questions and rationales. Educational review only — protocols and interventions follow your department's policies and current guidelines; verify before applying.
The primary survey and hemorrhage control
Primary survey (XABCDE): control massive external hemorrhage first (the X — exsanguination can kill before an airway problem does), then Airway with cervical-spine protection, Breathing (look for the immediately life-threatening chest injuries — tension pneumothorax, open pneumothorax, massive hemothorax, flail chest), Circulation (control bleeding, assess perfusion, establish access, begin resuscitation — balanced blood products for hemorrhagic shock per massive-transfusion protocols rather than crystalloid floods), Disability (neuro status, GCS, pupils, glucose), and Exposure/Environment (undress to find injuries, then prevent hypothermia). Each step fixes its life threat before moving on.
Shock recognition: trauma shock is hemorrhagic until proven otherwise — and compensated shock (tachycardia, narrowed pulse pressure, anxiety, cool skin) precedes hypotension, which is a late, ominous sign, especially in young patients and children who compensate well. The trauma triad of death — hypothermia, acidosis, and coagulopathy — feed each other in a lethal spiral, so keeping the patient warm, restoring perfusion, and using balanced blood products (damage-control resuscitation) are treatments, not comforts. The exam expects you to catch shock early, prioritize hemorrhage control, and prevent the triad.
Patterned injuries and special populations
Chest: tension pneumothorax (decompress clinically, don't wait for imaging), open pneumothorax (occlusive dressing, monitor for tension), massive hemothorax (large-bore chest tube and resuscitation), cardiac tamponade (Beck's triad — pericardiocentesis), and flail chest (support ventilation; the underlying pulmonary contusion is the real threat). Head: prevent secondary injury — oxygenation, blood-pressure support (avoid hypotension), normal ventilation (hyperventilation only for active herniation), and recognize Cushing's triad and herniation; spinal precautions per protocol and recognition of neurogenic shock (hypotension with bradycardia and warm dry skin).
Abdominal/pelvic: suspect internal hemorrhage from mechanism and shock signs even without external bleeding; unstable pelvic fractures can hemorrhage massively (binder per protocol, minimal handling). Special populations change the assessment: pregnant trauma patients need left-lateral tilt/uterine displacement (the best fetal resuscitation is maternal resuscitation), and the fetus is hypoperfused before maternal vitals change; pediatric patients have greater physiologic reserve then sudden decompensation, and weight-based everything; geriatric patients can have serious injury with deceptively normal vitals (medications, blunted responses) and are sensitive to even modest blood loss. The trauma throughline: run the survey in order, treat hemorrhage and the triad aggressively, and let mechanism and special-population physiology raise your suspicion.
Practice questions with answers & rationales
Q1. A trauma patient has an obviously deformed, bleeding femur and snoring respirations. What do you address first?
Answer: Order the survey: control the massive external hemorrhage (direct pressure/tourniquet — the X) and then immediately open the airway (with C-spine protection). Exsanguinating external bleeding can kill faster than the airway problem, but both come before the dramatic fracture itself, which is addressed later. The deformed femur is a distractor; the survey's job is to fix the lethal problems (bleeding, airway) in order first.
Q2. Why is hypotension considered a late sign in a young trauma patient?
Answer: Healthy young patients compensate for blood loss with tachycardia and vasoconstriction, maintaining blood pressure until they've lost a large fraction of their volume — so by the time the pressure falls, they are decompensating with little reserve. The early signs are tachycardia, a narrowing pulse pressure, anxiety/restlessness, and cool skin. Catching compensated shock before the pressure drops is the tested skill; 'normal BP = stable' is the trap.
Q3. What is the trauma triad of death, and why does it change your interventions?
Answer: Hypothermia, acidosis, and coagulopathy — a self-reinforcing spiral: hypothermia and acidosis impair clotting, bleeding worsens acidosis and heat loss, and so on. It reframes basic measures as treatments: aggressively keep the patient warm, restore perfusion to correct acidosis, and use balanced blood products (damage-control resuscitation) rather than crystalloid floods that dilute clotting factors. Preventing and interrupting the triad is central to modern trauma care and a frequent exam theme.
Q4. A patient with a shocky presentation has no external bleeding but a tender, rigid abdomen and an unstable pelvis. Where's the blood and what do you do?
Answer: Internal hemorrhage — the abdomen and pelvis can sequester large volumes. Apply a pelvic binder per protocol and minimize movement (unstable pelvic fractures bleed with manipulation), establish large-bore access, begin balanced blood-product resuscitation per massive-transfusion protocol, keep the patient warm, and expedite definitive control (surgery/IR). Recognizing 'shock without external bleeding' as internal hemorrhage and avoiding excess crystalloid are the tested points.
Q5. Why does a pregnant trauma patient need left-lateral tilt or manual uterine displacement?
Answer: From roughly 20 weeks, a supine gravid uterus compresses the inferior vena cava (and aorta), dropping preload and blood pressure (supine hypotensive syndrome) and degrading resuscitation/CPR effectiveness. Left-lateral tilt or manual left uterine displacement relieves the compression — and because the best fetal resuscitation is maternal resuscitation, this positioning is maintained even during CPR (tilt the board). It's the highest-yield positioning intervention in trauma during pregnancy.
Q6. Which immediately life-threatening chest injuries are sought during the Breathing step of the primary survey?
Answer: Tension pneumothorax, open pneumothorax, massive hemothorax, and flail chest (with its underlying pulmonary contusion) — the chest injuries that kill quickly and need immediate intervention (decompression, occlusive dressing, chest tube/resuscitation, ventilatory support). Identifying these during Breathing — by inspection, auscultation, and palpation — and treating them before moving on is the structured priority the exam tests.
Q7. Why can a geriatric trauma patient with 'normal' vital signs still be seriously injured?
Answer: Older patients have less physiologic reserve and blunted compensatory responses — medications (like beta-blockers) prevent the expected tachycardia, baseline hypertension makes a 'normal' pressure actually low for them, and reduced organ reserve means modest blood loss is poorly tolerated. So normal-appearing vitals can mask significant injury, and a higher index of suspicion, lower transfusion thresholds, and careful monitoring are warranted. Undertriaging the geriatric trauma patient is a documented safety problem.
Common mistakes to avoid
- Treating the dramatic, non-lethal injury (deformed fracture) before the lethal ones (hemorrhage, airway, tension pneumothorax).
- Waiting for hypotension to recognize shock, especially in young patients and children.
- Flooding hemorrhagic shock with crystalloid instead of balanced blood products, and neglecting warming — feeding the trauma triad.
- Missing internal hemorrhage (abdomen, pelvis) because there's no external bleeding.
- Forgetting left-lateral tilt/uterine displacement in the pregnant trauma patient.
- Trusting normal vitals in the geriatric trauma patient whose physiology masks serious injury.