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Difficulty: MediumCardiothoracic and Vascular Surgery

Following a high-velocity head-on vehicular collision, emergency medical services transport a 41-year-old woman to the local trauma center. She reports intense chest discomfort that radiates toward her scapulae. Initial vital signs indicate a blood pressure of 158/92 mmHg and a heart rate of 108 beats/min. Bedside ultrasound evaluation of the abdomen and pericardium is negative for free fluid. A portable anteroposterior chest radiograph demonstrates an enlarged mediastinal silhouette and indistinctness of the aortic arch contour. Arrange the subsequent clinical management steps in the correct chronological order.

  1. 1Obtain a contrast-enhanced CT scan of the thorax with arterial phase imaging.
  2. 2Initiate intravenous esmolol to achieve strict hemodynamic control.
  3. 3Acquire a formal consultation from the cardiothoracic surgical service.
  4. 4Proceed with definitive thoracic endovascular aortic repair (TEVAR).

Answer

The correct sequence requires first confirming the diagnosis with a thoracic CT scan, followed immediately by medical stabilization utilizing an intravenous beta-blocker, then securing a surgical consultation, and finally executing definitive treatment with TEVAR.
In the context of high-energy deceleration trauma, an enlarged mediastinal silhouette on a plain radiograph raises profound suspicion for a blunt thoracic aortic injury (BTAI). Because this patient exhibits hemodynamic stability and lacks free fluid on the FAST exam, the mandatory initial step is definitive structural imaging via a contrast-enhanced thoracic CT scan. Once the diagnosis of BTAI is established, clinical priority transitions to preventing interval aortic rupture by blunting aortic wall shear stress (anti-impulse therapy). This goal is accomplished initially with a short-acting intravenous beta-blocker (such as esmolol) to drive the heart rate below 100 beats/min and the systolic blood pressure under 100 mmHg. Only after such medical stabilization has been instituted should the cardiothoracic surgery team finalize the operative blueprint, which conventionally culminates in thoracic endovascular aortic repair (TEVAR) for injuries categorized as Grade II through IV.

Step-by-Step Solution

1
Obtain a contrast-enhanced CT scan of the thorax with arterial phase imaging.
Provides definitive anatomical diagnosis of the blunt thoracic aortic injury.
An enlarged mediastinum on a portable supine radiograph carries a high false-positive rate. In a stable patient, definitive imaging must precede the administration of potentially hypotensive medical therapies.
2
Initiate intravenous esmolol to achieve strict hemodynamic control.
Decreases heart rate and systemic blood pressure to desired target parameters.
Anti-impulse therapy lessens the shear stress against the damaged aortic wall, fundamentally reducing the immediate risk of a fatal complete transection while the patient awaits structural repair.
3
Acquire a formal consultation from the cardiothoracic surgical service.
Ensures specialist evaluation of the patient's imaging and clinical status.
Advanced surgical expertise is necessary to accurately classify the injury grade and meticulously plan the most appropriate anatomical approach for repair.
4
Proceed with definitive thoracic endovascular aortic repair (TEVAR).
Yields structural resolution of the traumatic aortic defect.
TEVAR serves as the contemporary standard of care for most anatomically amenable blunt thoracic aortic injuries, providing lower morbidity rates when compared to an open surgical approach.

Key Concept

The chronological management of a hemodynamically stable patient harboring a suspected blunt thoracic aortic injury mandates definitive imaging confirmation first, subsequent immediate medical anti-impulse therapy to arrest progression, followed by surgical assessment for endovascular repair.
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Topics

Cardiothoracic and Vascular Surgery

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