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Difficulty: MediumGastrointestinal and Abdominal Surgery

A 65-year-old man is evaluated for severe, worsening abdominal pain and persistent bilious emesis. He is currently on postoperative day 6 following a robotic-assisted prostatectomy for localized prostate cancer. The patient reports passing no flatus or stool for the past 24 hours. His temperature is 38.6°C (101.5°F), pulse is 118/min, and blood pressure is 98/60 mmHg. Physical examination reveals a markedly distended and tympanic abdomen. There is significant periumbilical tenderness with involuntary guarding and rebound tenderness. Bowel sounds are absent. Laboratory studies demonstrate a leukocyte count of 18,500/mm³ and a serum lactate level of 4.1 mmol/L. A portable abdominal radiograph shows multiple dilated loops of small intestine with prominent air-fluid levels and a complete absence of colonic gas. Which of the following is the most appropriate next step in patient management?

  1. Urgent open surgical explorationAnswer
  2. B
    Insertion of a gastric decompression tube and serial clinical evaluations
  3. C
    Cross-sectional abdominal imaging with intravenous contrast
  4. D
    Empiric antimicrobial therapy and pan-culturing
  5. E
    Therapeutic colonoscopy for bowel detorsion

Answer

The most appropriate next step is urgent open surgical exploration.
Urgent open surgical exploration is required because this patient presents with a small bowel obstruction complicated by clear signs of bowel ischemia and peritonitis. The presence of fever, tachycardia, significant leukocytosis, elevated lactate, and involuntary guarding strongly suggests bowel strangulation. In this scenario, conservative management is contraindicated, and any delay in definitive surgical intervention dramatically increases morbidity and mortality.

Step-by-Step Solution

1
Analyze the patient's clinical presentation and radiographic findings.
The patient has absent colonic gas, dilated small bowel loops, obstipation, and bilious emesis.
These findings establish a definitive diagnosis of a complete small bowel obstruction.
2
Evaluate the clinical picture for signs of complications or strangulation.
The patient exhibits fever, tachycardia, involuntary guarding, leukocytosis, and an elevated serum lactate level.
These are hallmark indicators of bowel ischemia and necrosis secondary to a strangulated small bowel obstruction.
3
Determine the appropriate management pathway based on the presence of complications.
Urgent open surgical exploration is indicated.
While uncomplicated obstructions can be managed conservatively, the presence of peritonitis and ischemia requires immediate surgical intervention to resect necrotic bowel and relieve the obstruction.

Key Concept

Management of Complicated Small Bowel Obstruction
Estimated Time:1m 15s
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Topics

Gastrointestinal and Abdominal Surgery

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