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Difficulty: HardSurgical and Procedural Interventions

A 28-year-old man is brought to the emergency department 30 minutes after being involved in a high-speed motor vehicle collision. He was the unrestrained driver of a vehicle that struck a concrete barrier. On arrival, he is confused and diaphoretic. His temperature is 36.5∘C36.5^{\circ}\text{C} (97.7∘F97.7^{\circ}\text{F}), blood pressure is 78/52 mm Hg78/52\text{ mm Hg}, pulse is 135/min135/\text{min}, and respirations are 24/min24/\text{min}. Oxygen saturation is 96% on high-flow oxygen via a non-rebreather mask. The airway is patent. Breath sounds are equal bilaterally. The abdomen is distended and diffusely tender to palpation. The pelvis is stable to anteroposterior and lateral compression. A portable chest radiograph reveals a widened mediastinum with obliteration of the aortic knob but no pneumothorax or hemothorax. A focused assessment with sonography for trauma (FAST) examination demonstrates a large amount of free fluid in the hepatorenal recess (Morison's pouch) and the splenorenal recess. Two large-bore intravenous lines are placed, and balanced blood product transfusion is initiated. Which of the following is the most appropriate next step in the management of this patient?

  1. Immediate exploratory laparotomyAnswer
  2. B
    Computed tomography angiography of the chest
  3. C
    Transesophageal echocardiography
  4. D
    Computed tomography of the abdomen and pelvis
  5. E
    Intravenous administration of esmolol

Answer

The most appropriate next step in management is immediate exploratory laparotomy.
The patient is in class III/IV hypovolemic (hemorrhagic) shock due to blunt abdominal trauma, evidenced by profound hypotension, marked tachycardia, and a positive FAST examination demonstrating massive free fluid. According to Advanced Trauma Life Support (ATLS) algorithms, a hemodynamically unstable patient with a positive FAST requires an immediate exploratory laparotomy to identify and control the source of intra-abdominal hemorrhage. While the widened mediastinum on the portable chest radiograph is highly concerning for a blunt thoracic aortic injury (BTAI), the intra-abdominal bleeding is the most immediate, uncontained cause of his hemodynamic instability. BTAIs in patients who survive transport to the hospital are almost universally contained by the adventitia. Therefore, the acute, uncontained intra-abdominal bleeding must be surgically addressed first, often with a transesophageal echocardiogram (TEE) performed concurrently by anesthesia in the operating room once abdominal hemostasis is underway.

Step-by-Step Solution

1
Evaluate airway, breathing, and circulation (ABCs) in the trauma patient.
The patient has a patent airway and adequate oxygenation, but is in severe hemorrhagic shock (hypotension, tachycardia) with a distended, rigid abdomen.
Initial trauma evaluation always prioritizes the identification of life-threatening compromises in the primary survey.
2
Analyze the competing life-threatening injuries identified on initial adjunct imaging (chest x-ray and FAST).
The widened mediastinum suggests blunt thoracic aortic injury (BTAI), while the positive FAST confirms massive intra-abdominal hemorrhage.
Multiple sources of hemorrhage must be triaged based on immediately impending mortality and whether the bleeding is contained or uncontained.
3
Determine the priority surgical or procedural intervention.
Exploratory laparotomy is indicated immediately over further aortic workup.
Uncontained intra-abdominal hemorrhage causes rapid exsanguination and must be surgically controlled first. Patients surviving BTAI to reach the emergency department typically have a contained rupture, which can be evaluated and addressed after the active abdominal bleeding is stopped.

Key Concept

In a hemodynamically unstable trauma patient with a positive FAST examination and a suspected blunt thoracic aortic injury, immediate exploratory laparotomy for abdominal hemorrhage control takes precedence over further diagnostic workup of the aorta.
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Topics

Surgical and Procedural Interventions

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