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Difficulty: HardTrauma and Burns

A 56-year-old man is brought to the emergency department after a high-speed motor vehicle collision. He was the restrained driver in a head-on impact with a concrete pillar. His airway is secure, and breath sounds are equal bilaterally. Vital signs show a heart rate of 118/min and a blood pressure of 165/92 mmHg. He is alert but complains of severe interscapular back pain. Secondary survey reveals a seatbelt sign across the chest. A portable anteroposterior chest radiograph obtained in the trauma bay demonstrates a widened mediastinum and loss of the aortic knob contour. The patient remains hemodynamically stable. Arrange the following diagnostic and therapeutic steps in the most appropriate chronological sequence for the optimal management of this patient.

  1. 1Initiate intravenous administration of a titratable beta-blocker (e.g., esmolol)
  2. 2Perform multidetector computed tomography angiography (CTA) of the chest
  3. 3Proceed with thoracic endovascular aortic repair (TEVAR)
  4. 4Obtain follow-up surveillance imaging at 1 to 12 months

Answer

The correct sequence prioritizes immediate prevention of catastrophic rupture: 1) Initiate intravenous beta-blockade, 2) Perform CTA of the chest, 3) Proceed with TEVAR, and 4) Obtain follow-up surveillance imaging.
In cases of suspected blunt thoracic aortic injury (BTAI) in a hemodynamically stable patient, the immediate priority is to prevent complete aortic rupture. This is achieved through anti-impulse therapy (intravenous beta-blockers) to reduce the heart rate and blood pressure, thereby decreasing the shearing forces on the injured aorta. Only after the hemodynamics are strictly controlled should the patient be moved for definitive diagnostic imaging via CTA. Once the anatomy of the injury is defined, definitive treatment with thoracic endovascular aortic repair (TEVAR) is performed, which necessitates subsequent long-term surveillance imaging.

Step-by-Step Solution

1
Recognize signs of blunt thoracic aortic injury (BTAI).
The mechanism of injury, severe interscapular pain, and widened mediastinum raise high suspicion for a contained aortic rupture.
Identifying a potential life-threatening aortic injury dictates the immediate prioritization of preventing a free rupture.
2
Initiate anti-impulse therapy before transferring the patient.
Esmolol is administered to lower the heart rate to less than 100/min and systolic blood pressure to less than 100 mmHg.
Reducing left ventricular dP/dt minimizes shear stress on the injured aortic wall, preventing catastrophic free rupture during evaluation.
3
Obtain definitive imaging.
A CTA of the chest is performed.
CTA accurately characterizes the injury (e.g., intimal tear, pseudoaneurysm) and provides the precise anatomical measurements required for endograft sizing.
4
Perform definitive repair.
The patient undergoes Thoracic Endovascular Aortic Repair (TEVAR).
Endovascular repair is the modern standard of care for BTAI, followed by necessary long-term surveillance.

Key Concept

Management algorithm for Blunt Thoracic Aortic Injury (BTAI)
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Topics

Trauma and Burns

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