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Difficulty: HardTrauma and Burns

A 22-year-old male is evaluated in the surgical intensive care unit for sudden-onset, severe abdominal pain. Three days ago, he was involved in a high-speed motorcycle collision, during which he was thrown forward and struck his upper abdomen against the handlebars. His initial trauma evaluation in the emergency department demonstrated stable hemodynamics, and a computed tomography scan of the abdomen and pelvis showed a non-expanding Grade II splenic laceration without active contrast extravasation. He was admitted for nonoperative management and had been clinically stable until this morning.

Current vital signs include a temperature of 38.6°C (101.5°F), a heart rate of 135/min, a respiratory rate of 24/min, and a blood pressure of 82/48 mm Hg. Physical examination reveals a distended abdomen with diffuse rigidity, involuntary guarding, and severe rebound tenderness in all four quadrants. Bowel sounds are absent. Following the rapid infusion of 2 L of isotonic crystalloid, his blood pressure remains 86/50 mm Hg.

Which of the following is the most appropriate next step in the management of this patient?

  1. Exploratory laparotomyAnswer
  2. B
    Computed tomography of the abdomen and pelvis with intravenous contrast
  3. C
    Catheter angiography with possible splenic artery embolization
  4. D
    Diagnostic peritoneal lavage
  5. E
    Intravenous broad-spectrum antibiotics, nasogastric tube placement, and continued observation

Answer

Exploratory laparotomy
The correct answer is exploratory laparotomy. This patient suffered a direct blow to the abdomen (handlebar injury), which is a classic mechanism for hollow viscus injuries (e.g., bowel contusion, mesenteric tear, pancreatic injury). These injuries can have a delayed presentation; ischemia or slowly progressing necrosis can lead to overt bowel perforation several days after the initial trauma. The patient now presents with hemodynamic shock (blood pressure 82/48 mm Hg that does not normalize with fluids), fever, and frank peritonitis (diffuse rigidity and rebound tenderness). In any trauma patient, the presence of hemodynamic instability combined with peritonitis is an absolute indication for an immediate exploratory laparotomy to achieve source control and repair the injury.

Step-by-Step Solution

1
Assess the patient's hemodynamic status following fluid resuscitation.
The patient's blood pressure is 86/50 mm Hg after 2 L of crystalloid.
Determines that the patient is in persistent shock (hemodynamically unstable).
2
Evaluate the physical examination findings.
The patient has a rigid abdomen, involuntary guarding, and severe rebound tenderness in all four quadrants.
Identifies frank peritonitis, indicating severe intra-abdominal inflammation, likely from a perforated viscus or ischemic bowel.
3
Synthesize the mechanism of injury and timeline.
The direct handlebar blow to the abdomen led to a delayed presentation of fever and peritonitis on hospital day 3.
Blunt abdominal trauma, particularly from a direct blow, can cause mesenteric lacerations or crush injuries to the bowel that slowly necrose and perforate days later.
4
Determine the definitive next step in management.
The patient requires an immediate exploratory laparotomy.
The combination of hemodynamic instability and an acute surgical abdomen (peritonitis) is an absolute indication for emergency laparotomy, bypassing any further diagnostic imaging.

Key Concept

In patients with blunt abdominal trauma, the development of hemodynamic instability and frank peritonitis (e.g., rigid abdomen, rebound tenderness) represents an absolute indication for immediate exploratory laparotomy. Further diagnostic testing (such as CT scans) is contraindicated.
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Topics

Trauma and Burns

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