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Difficulty: MediumSurgical and Procedural Interventions

An 8181-year-old male is evaluated in the acute care ward after being transferred from an assisted living facility. Over the past 4848 hours, he has experienced progressive abdominal swelling, recurrent bilious emesis, and an absolute inability to pass stool or flatus. His medical history is notable for an open appendectomy performed three decades ago. On evaluation, he appears lethargic and is in significant distress. Temperature is 38.9∘C38.9^\circ\text{C} (102.0∘F102.0^\circ\text{F}), pulse is 128/min128/\text{min}, respirations are 26/min26/\text{min}, and blood pressure is 86/50 mm Hg86/50\text{ mm Hg}. Physical examination reveals a tympanitic and markedly distended abdomen with absent bowel sounds. Palpation elicits diffuse rigidity, involuntary guarding, and severe rebound tenderness across all four quadrants. Laboratory studies demonstrate a leukocyte count of 22,000/mm322,000/\text{mm}^3 with 18%18\% bands, and a serum lactate level of 6.1 mmol/L6.1\text{ mmol/L}. Intravenous crystalloid fluid resuscitation and broad-spectrum antibiotics are actively being infused. Which of the following interventions represent the most appropriate next steps in this patient's procedural and surgical management? (Select all that apply)

  1. Insertion of a double-lumen nasogastric tubeAnswer
  2. Prompt transfer to the operating room for exploratory laparotomyAnswer
  3. C
    Intravenous administration of metoclopramide
  4. D
    Computed tomography of the abdomen and pelvis with oral contrast
  5. E
    Magnetic resonance enterography

Answer

The correct interventions are the insertion of a double-lumen nasogastric tube and prompt transfer to the operating room for exploratory laparotomy.
The patient's clinical presentation of hemodynamic instability, diffuse abdominal rigidity, rebound tenderness, severe lactic acidosis, and leukocytosis is highly indicative of a strangulated small bowel obstruction with ischemic necrosis or perforation. In this acute surgical emergency, definitive management requires immediate gastrointestinal decompression with a nasogastric tube to prevent aspiration, running concurrently with urgent exploratory laparotomy to resect necrotic bowel and achieve definitive source control.

Step-by-Step Solution

1
Analyze the clinical presentation and vital signs.
The patient has a mechanical small bowel obstruction (distension, bilious emesis, prior abdominal surgery) complicated by bowel strangulation and peritonitis (fever, hypotension, rigid abdomen, elevated lactate).
Establishing the severity of the obstruction determines the urgency and type of necessary interventions.
2
Determine the necessary immediate non-operative procedural interventions.
Nasogastric tube decompression is mandatory.
Decompression evacuates pooled gastric and enteric contents, significantly lowering the risk of aspiration during the imminent induction of general anesthesia.
3
Determine the definitive surgical management.
Exploratory laparotomy must be performed immediately.
The presence of hemodynamic instability combined with peritonitis indicates intra-abdominal catastrophe (e.g., ischemic or perforated bowel), mandating immediate surgical exploration for source control rather than further diagnostic delay.

Key Concept

Immediate procedural decompression and surgical exploration in strangulated small bowel obstruction
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Topics

Surgical and Procedural Interventions

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