Paramedics bring a 72-year-old woman to the emergency department after the staff at her as… — USMLE Step 3

Paramedics bring a 72-year-old woman to the emergency department after the staff at her assisted living facility noted non-bloody, bilious emesis and progressive lethargy since yesterday morning. She has a medical history significant for vascular dementia, coronary artery disease, and an open cholecystectomy a decade ago. Currently, her temperature is $38.3^\circ\text{C}$ ( $101.0^\circ\text{F}$ ), blood pressure is $88/54 \text{ mm Hg}$ , pulse is $118/\text{min}$ , and respiratory rate is $22/\text{min}$ . On physical examination, the abdomen is asymmetric, visibly distended, and exquisitely tender with rebound and rigidity in the right lower quadrant. Further inspection reveals a $4 \text{ cm}$ , tense, erythematous mass palpable just inferior to the right inguinal ligament. Initial laboratory studies show a leukocyte count of $18,500/\text{mm}^3$ and a serum lactate of $4.2 \text{ mmol/L}$ . Intravenous fluids and broad-spectrum antibiotics are immediately initiated. Which of the following is the most appropriate next step in the management of this patient?

A
Computed tomography of the abdomen and pelvis with intravenous contrast
B
Bedside manual reduction of the groin mass
Emergent surgical explorationAnswer
D
Placement of a nasogastric tube and serial abdominal examinations
E
Admission to the medical intensive care unit for non-operative management

Answer

Emergent surgical exploration

The correct answer is emergent surgical exploration. This patient's presentation is highly consistent with a strangulated femoral hernia, indicated by a tender, erythematous groin mass located below the inguinal ligament. Furthermore, the patient is manifesting signs of severe sepsis (hypotension, tachycardia, fever, lactic acidosis) and peritonitis (rebound, rigidity). In the setting of a strangulated hernia with dead or dying bowel, immediate operative exploration is the standard of care to relieve the obstruction, resect necrotic tissue, and prevent death.

Step-by-Step Solution

Identify the clinical presentation and physical exam findings.

The patient presents with bilious emesis, shock, peritonitis, lactic acidosis, and an erythematous mass located inferior to the inguinal ligament.

These findings are classic for a strangulated femoral hernia complicated by ischemic bowel and sepsis.

Determine the necessity and timing of intervention.

The presence of hard signs of bowel strangulation (erythema over the hernia sac, peritonitis, elevated lactate, hemodynamic instability) mandates immediate operative intervention.

Strangulated hernias involve compromised blood supply to the herniated bowel. Any delay increases the risk of frank perforation and mortality.

Evaluate the distractors against the need for immediate surgery.

Diagnostic imaging, manual reduction, or isolated medical observation are ruled out.

Imaging delays care, manual reduction of dead bowel is contraindicated, and medical management without source control is universally fatal in this context.

Key Concept

Surgical and Procedural Interventions for Strangulated Hernias

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