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Difficulty: MediumPreoperative and Postoperative Care

On postoperative day 8 following an exploratory laparotomy and right salpingo-oophorectomy for a ruptured ectopic pregnancy, a 42-year-old woman requires urgent evaluation for sudden, severe abdominal pain. She had previously been recovering appropriately, with a return of bowel function and tolerance of a soft diet by day 4. However, over the past 12 hours, she has developed colicky pain and recurrent bilious vomiting, and she has not passed flatus or stool. Her temperature is 38.7°C (101.7°F), blood pressure is 100/65 mmHg, pulse is 122/min, and respirations are 22/min. On examination, the patient is in obvious distress. Her abdomen is markedly distended. Palpation elicits diffuse tenderness, involuntary guarding, and severe rebound tenderness. Bowel sounds are absent. Laboratory results indicate a leukocyte count of 16,800/mm³ with 12% bands and a serum lactate level of 3.8 mmol/L. An upright abdominal radiograph demonstrates multiple air-fluid levels within dilated loops of small intestine and a paucity of colonic gas. Which of the following is the most appropriate next step in management?

  1. Urgent exploratory laparotomyAnswer
  2. B
    Placement of a nasogastric tube and serial abdominal examinations
  3. C
    Abdominal computed tomography scan with enteral and intravenous contrast
  4. D
    Intravenous administration of broad-spectrum antibiotics and intensive care admission
  5. E
    Intravenous administration of metoclopramide and early patient mobilization

Answer

Urgent exploratory laparotomy is the appropriate intervention due to signs of strangulation and bowel ischemia.
The correct answer identifies that this patient has a mechanical small bowel obstruction (SBO) complicated by bowel strangulation. Adhesions from her recent laparotomy are the most likely cause of the obstruction. While many cases of postoperative SBO can be managed conservatively with bowel rest and nasogastric tube decompression, the development of fever, significant tachycardia, leukocytosis, elevated serum lactate, and peritoneal signs (guarding, rebound tenderness) are hallmark indicators of bowel ischemia or necrosis. In the presence of these 'red flag' signs, the obstruction is considered a surgical emergency, and urgent exploratory laparotomy is required to relieve the obstruction and resect any non-viable intestine.

Step-by-Step Solution

1
Analyze the patient's clinical and radiographic presentation.
The patient has dilated small bowel loops with air-fluid levels, absent distal gas, colicky pain, and vomiting, confirming a diagnosis of mechanical Small Bowel Obstruction (SBO).
Establishing the primary diagnosis is necessary before risk stratifying the patient's condition.
2
Evaluate for signs of complications, specifically bowel strangulation or ischemia.
The patient exhibits fever, tachycardia, leukocytosis with a left shift, lactic acidosis, guarding, and rebound tenderness.
Differentiating between simple and complicated (strangulated) SBO dictates whether medical or surgical management is indicated.
3
Determine the definitive next step in management based on the presence of peritoneal signs.
The presence of peritonitis and ischemia mandates immediate surgical exploration rather than conservative management or further imaging.
Delaying surgery in a patient with an ischemic or necrotic bowel significantly increases morbidity and mortality.

Key Concept

Patients presenting with a postoperative small bowel obstruction and signs of clinical deterioration, peritonitis, or bowel ischemia (fever, tachycardia, leukocytosis, metabolic acidosis) require immediate surgical exploration.
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Topics

Preoperative and Postoperative Care

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