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Difficulty: MediumCardiothoracic and Vascular Surgery

A 27-year-old man is brought to the emergency department by paramedics after sustaining a single stab wound to the left anterior chest during a physical altercation. On arrival, he is restless, diaphoretic, and confused. His temperature is 36.6°C (97.9°F), blood pressure is 64/38 mmHg, pulse is 142/min, and respiratory rate is 28/min. Oxygen saturation is 93% on a non-rebreather mask. Physical examination reveals a 3-cm laceration at the left fourth intercostal space, directly adjacent to the sternal border. His jugular veins are markedly distended. Pulmonary auscultation reveals clear and symmetric breath sounds bilaterally. Cardiac auscultation demonstrates faint and muffled heart sounds. The trachea is midline. A bedside focused assessment with sonography for trauma (FAST) confirms a large anechoic space surrounding the heart with evidence of right ventricular collapse during diastole. Rapid intravenous infusion of 1 liter of warmed crystalloid solution does not improve his blood pressure. Which of the following is the most appropriate next step in the management of this patient?

  1. A
    Computed tomography angiography of the chest
  2. B
    Placement of a left-sided tube thoracostomy and admission to the intensive care unit
  3. Emergent left anterolateral thoracotomyAnswer
  4. D
    Administration of intravenous furosemide
  5. E
    Postponing surgical intervention to locate a surrogate decision-maker

Answer

The correct answer is emergent left anterolateral thoracotomy.
The correct answer is emergent left anterolateral thoracotomy. This patient has sustained penetrating thoracic trauma and is presenting with profound, fluid-refractory obstructive shock. His clinical presentation of hypotension, marked jugular venous distension, and muffled heart sounds constitutes Beck's triad, which is classically associated with cardiac tamponade. The diagnosis is definitively confirmed by the FAST examination demonstrating a large pericardial effusion with right ventricular collapse. In the setting of penetrating chest trauma with severe hemodynamic instability and confirmed tamponade, the most appropriate and life-saving next step is immediate surgical exploration (emergent thoracotomy or median sternotomy) to decompress the pericardium, relieve the obstructive shock, and repair the underlying cardiac injury.

Step-by-Step Solution

1
Analyze the patient's hemodynamic status and physical examination findings.
The patient is in profound shock (blood pressure 64/38 mmHg) and exhibits Beck's triad: hypotension, distended neck veins, and muffled heart sounds.
To identify the primary life-threatening pathophysiology causing the deterioration.
2
Interpret the bedside ultrasound (FAST) results.
The FAST examination confirms a large pericardial effusion with right ventricular diastolic collapse.
To definitively diagnose cardiac tamponade as the specific etiology of the patient's obstructive shock.
3
Determine the appropriate surgical intervention for unstable traumatic cardiac tamponade.
Immediate surgical exploration via thoracotomy or median sternotomy is indicated.
Definitive surgical access is required immediately to relieve the tamponade, evacuate the clot, and repair the underlying penetrating cardiac injury.

Key Concept

Hemodynamically unstable patients with penetrating thoracic trauma and confirmed cardiac tamponade require immediate surgical exploration (emergent thoracotomy or median sternotomy).
Estimated Time:1m 15s
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Topics

Cardiothoracic and Vascular Surgery

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