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Zorluk: ZorGastroenterology and Hepatology

During morning rounds, the medical team evaluates a 42-year-old female patient admitted overnight for obstipation and diffuse abdominal discomfort. Her past medical history is significant for Crohn's disease, for which she underwent an ileocecal resection five years ago. Initial emergency department radiographs revealed multiple dilated loops of small bowel with air-fluid levels and a paucity of colonic gas. She was made strictly nothing-by-mouth, and a nasogastric tube was placed for decompression.

Upon bedside reassessment, the patient appears toxic and reports that her abdominal pain has sharply increased, transitioning from intermittent cramping to a severe, continuous ache.

Current vital signs are:
Temperature: 38.9∘C38.9^\circ\text{C} (102.0∘F102.0^\circ\text{F})
Heart rate: 122/min122/\text{min}
Blood pressure: 96/58 mm Hg96/58\text{ mm Hg}
Respiratory rate: 24/min24/\text{min}

Physical examination reveals a rigid abdomen with involuntary guarding and diffuse rebound tenderness. Bowel sounds are absent.

Laboratory analysis shows:
Leukocyte count: 18,500/mm318,500/\text{mm}^3
Serum lactate: 4.2 mmol/L4.2\text{ mmol/L}
Serum bicarbonate: 15 mEq/L15\text{ mEq/L}

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

  1. Immediate exploratory laparotomyCevap
  2. B
    Continued nasogastric decompression and clinical reassessment in 12 hours
  3. C
    Intravenous ciprofloxacin and metronidazole with continued observation
  4. D
    Intravenous methylprednisolone for an acute inflammatory flare
  5. E
    Computed tomography of the abdomen and pelvis with oral contrast

Cevap

The most appropriate next step is immediate exploratory laparotomy due to signs of a strangulated small bowel obstruction.
The correct answer is immediate exploratory laparotomy. This patient initially presented with an uncomplicated small bowel obstruction (SBO), likely secondary to adhesions from her prior abdominal surgery. However, her clinical status has rapidly deteriorated. The transition from intermittent, crampy pain to severe, continuous pain, combined with fever, tachycardia, hypotension, a rigid abdomen, severe leukocytosis, and lactic acidosis, strongly indicates progression to a strangulated small bowel obstruction (bowel ischemia). Strangulation is a surgical emergency requiring immediate exploratory laparotomy to resect the necrotic bowel and restore continuity. Any delay significantly increases the risk of perforation, overwhelming sepsis, and death.

Adım Adım Çözüm

1
Evaluate the patient's initial presentation and history.
The patient presented with clinical and radiographic evidence of a small bowel obstruction (SBO), likely due to adhesions from her prior ileocecal resection.
Prior abdominal surgeries create adhesions, which are the most common cause of mechanical SBO. Initial uncomplicated SBO is managed conservatively.
2
Analyze the acute changes in symptoms, vital signs, and physical examination.
The pain changed from crampy to severe and continuous. She developed fever, tachycardia, hypotension, and a rigid abdomen with rebound tenderness.
These findings represent a transition from an uncomplicated obstruction to overt peritonitis and systemic toxicity.
3
Interpret the laboratory findings.
Significant leukocytosis (18,500/mm318,500/\text{mm}^3) and an elevated serum lactate (4.2 mmol/L4.2\text{ mmol/L}) with anion gap metabolic acidosis are present.
Lactic acidosis and severe leukocytosis in the setting of an SBO are highly specific for bowel ischemia and necrosis (strangulation).
4
Determine the definitive next best step in management.
Immediate surgical intervention is required.
Strangulated bowel is a surgical emergency. Delaying surgical exploration for further imaging or continued conservative observation significantly increases mortality.

Anahtar Kavram

While uncomplicated small bowel obstructions can be managed conservatively with nasogastric decompression and bowel rest, the development of continuous abdominal pain, fever, hemodynamic instability, peritonitis, leukocytosis, or lactic acidosis indicates a strangulated obstruction requiring emergent exploratory laparotomy.
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Gastroenterology and Hepatology

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