Emergency Medicine · ATLS Trauma Protocol
The facts most likely to be tested
The Primary Survey follows the ABCDE mnemonic: Airway with cervical spine protection, Breathing, Circulation, Disability, and Exposure/Environment.
Needle decompression or tube thoracostomy is the immediate intervention for a tension pneumothorax presenting with tracheal deviation, hypotension, and absent breath sounds.
Circulation assessment requires immediate control of external hemorrhage and establishment of two large-bore IV access sites for isotonic crystalloid or blood product resuscitation.
FAST exam (Focused Assessment with Sonography for Trauma) is the diagnostic modality of choice to detect hemoperitoneum or pericardial tamponade in the hemodynamically unstable patient.
Disability is assessed using the Glasgow Coma Scale (GCS) and evaluation of pupillary response to identify potential intracranial injury.
The Secondary Survey is only initiated after the Primary Survey is complete and the patient is hemodynamically stabilized.
Log-rolling the patient during the Secondary Survey is essential to inspect the posterior surfaces and prevent missing occult spinal injuries or lacerations.
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A 24-year-old male is brought to the ED following a high-speed motor vehicle collision. He is tachycardic, hypotensive, and has distended neck veins with absent breath sounds on the right side. His trachea is deviated to the left. He is currently struggling to breathe and appears cyanotic.
What is the most appropriate next step in management?
Immediate needle decompression of the right chest
This patient presents with a classic tension pneumothorax, which is a life-threatening emergency identified during the 'B' (Breathing) phase of the Primary Survey, requiring immediate decompression before further imaging.
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Etiology / Epidemiology
Trauma is the leading cause of death for ages 1-44. ATLS protocol (ABCDE) is the universal standard for systematic evaluation.
Clinical Manifestations
Primary survey identifies life-threats: Beck's triad for tamponade, tension pneumothorax signs, and hemorrhagic shock.
Diagnosis
eFAST exam is the gold standard for rapid bedside detection of free fluid in the abdomen or pericardium.
Treatment
Initiate massive transfusion protocol for unstable patients; avoid aggressive crystalloid resuscitation to prevent coagulopathy.
Prognosis
Survival depends on the 'Golden Hour'; mortality is driven by the 'lethal triad' of acidosis, coagulopathy, and hypothermia.
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Epidemiology & Etiology
Trauma follows a bimodal distribution, with peaks in young adults (blunt/penetrating) and the elderly (falls). The ATLS (Advanced Trauma Life Support) framework is mandatory to prevent missed injuries. Rapid identification of reversible causes is the primary goal of the initial assessment.
Pertinent Anatomy
The airway is the priority, requiring assessment of the cervical spine. The thoracic cavity contains the heart and lungs, where tension pneumothorax can cause rapid obstructive shock. The abdomen is a 'hidden' space capable of holding significant blood volume without external signs.
Pathophysiology
Trauma triggers a systemic inflammatory response and potential hypovolemic shock. The lethal triad—acidosis, coagulopathy, and hypothermia—creates a self-perpetuating cycle of death. Early control of hemorrhage and restoration of perfusion are required to break this cycle.
Clinical Manifestations
Primary survey (ABCDE): Airway with C-spine protection, Breathing (check for tracheal deviation), Circulation (check for pulses/skin color), Disability (GCS), and Exposure. Red flags include hypotension, tachycardia, and altered mental status. Look for Battle sign or raccoon eyes indicating basilar skull fracture.
Diagnosis
The eFAST exam (Extended Focused Assessment with Sonography for Trauma) is the gold standard for detecting hemoperitoneum or pericardial effusion. CT trauma scan (pan-scan) is the definitive imaging for stable patients. Serum lactate > 2.5 mmol/L is a sensitive marker for occult shock.
Treatment
Airway management via rapid sequence intubation if GCS < 8. For circulation, use 1:1:1 blood product ratio (PRBCs:FFP:Platelets). Avoid excessive saline as it worsens acidosis. Use tranexamic acid within 3 hours of injury to reduce mortality.
Prognosis
Outcome is dictated by the Injury Severity Score (ISS). Monitor for compartment syndrome and acute respiratory distress syndrome (ARDS) as delayed complications. Early recognition of multiorgan failure is critical for survival.
Differential Diagnosis
Tension pneumothorax: absent breath sounds and tracheal deviation
Cardiac tamponade: muffled heart sounds and JVD
Hypovolemic shock: tachycardia and narrow pulse pressure
Neurogenic shock: hypotension with bradycardia
Aortic injury: widened mediastinum on CXR