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Difficulty: MediumPreoperative and Postoperative Care

An on-call physician is asked to assess a 59-year-old female patient on the surgical ward. She is currently on her seventh day of recovery after undergoing an open resection of a perforated appendix. The nursing staff reports that she has developed excruciating, unremitting abdominal pain over the last few hours, accompanied by three episodes of vomiting dark green fluid. She confirms she has not passed gas or had a bowel movement since yesterday morning.

Vital signs show a temperature of 39.1°C (102.4°F), blood pressure of 92/58 mm Hg, heart rate of 128/min, and respiratory rate of 24/min. On physical examination, the patient appears acutely ill and lies completely still in bed. Her abdomen is significantly distended. Palpation elicits diffuse rigidity, involuntary guarding, and severe tenderness with sudden release of pressure. Auscultation reveals a complete absence of bowel sounds. Blood tests reveal a white blood cell count of 21,000/mm³ and an elevated venous lactate concentration. Plain abdominal radiographs display multiple loops of dilated small intestine containing prominent air-fluid levels, alongside an absence of distal colonic gas.

Which of the following are appropriate next steps in managing this patient's current condition? (Select all that apply)

  1. Urgent surgical exploration of the abdomenAnswer
  2. Intravenous administration of broad-spectrum antimicrobial agentsAnswer
  3. C
    Implementation of conservative care with continuous nasogastric suction
  4. D
    Administration of oral osmotic laxatives to promote bowel transit
  5. E
    Collection of stool samples for bacterial toxin assays

Answer

The correct steps are urgent surgical exploration of the abdomen and intravenous administration of broad-spectrum antimicrobial agents.
The correct answers identify the need for emergent surgery and antimicrobial coverage. This patient is presenting with a small bowel obstruction (SBO) that has progressed to strangulation and peritonitis. The classic signs of an uncomplicated SBO include colicky abdominal pain, distension, bilious vomiting, and obstipation. However, the development of continuous (unremitting) pain, fever, tachycardia, hypotension, peritoneal signs (rigidity, involuntary guarding), marked leukocytosis, and lactic acidosis all indicate that the bowel has become ischemic or necrotic. In this scenario, conservative management is no longer an option. The definitive treatment is an immediate exploratory laparotomy to evaluate bowel viability and resect any necrotic segments. Concurrently, because the ischemic bowel wall loses its mucosal integrity, enteric bacteria translocate into the peritoneal cavity and bloodstream. Therefore, initiating broad-spectrum intravenous antibiotics immediately is critical to manage the resulting sepsis.

Step-by-Step Solution

1
Analyze the clinical presentation and vital signs.
The patient has cardinal signs of a small bowel obstruction (SBO) including bilious vomiting, obstipation, and abdominal distension, combined with a high fever (39.1°C) and hemodynamic instability (hypotension, marked tachycardia).
Identifying systemic instability helps differentiate between uncomplicated and complicated surgical emergencies.
2
Evaluate the physical examination and laboratory/imaging findings.
The presence of a rigid abdomen with rebound tenderness indicates peritonitis. Leukocytosis, elevated lactate, and dilated small bowel loops confirm an SBO complicated by bowel ischemia or frank necrosis (strangulation).
Signs of peritonitis and ischemia dictate the urgency of the required intervention.
3
Determine the optimal management strategy for a complicated SBO.
Due to the impending or actual bowel perforation, the patient requires immediate broad-spectrum antibiotics to cover enteric pathogens and emergent exploratory laparotomy to resect the non-viable intestine.
Delaying surgery in the presence of strangulated bowel leads to rapidly progressive sepsis and high mortality.

Key Concept

Patients with a small bowel obstruction who develop signs of strangulation (fever, tachycardia, leukocytosis, metabolic acidosis) or peritonitis (rigidity, rebound tenderness) require immediate administration of broad-spectrum antibiotics and emergent surgical exploration.
Estimated Time:1m 30s
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Topics

Preoperative and Postoperative Care

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