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Zorluk: OrtaInterpreting Imaging Results

A 68-year-old woman is evaluated in the emergency department for severe, diffuse abdominal pain that began suddenly 3 hours ago. She has a history of hypertension, type 2 diabetes mellitus, and paroxysmal atrial fibrillation for which she takes apixaban, though she admits to missing several doses recently. On physical examination, her temperature is 37.8°C (100°F), blood pressure is 110/70 mmHg, pulse is 118/min and irregularly irregular, and respiratory rate is 22/min. The abdomen is soft and non-distended, with mild diffuse tenderness but no rebound, guarding, or rigidity. Bowel sounds are decreased. Laboratory studies show a leukocyte count of 18,000/mm³ and a serum lactate of 5.2 mmol/L. An unenhanced CT scan of the abdomen and pelvis is performed. The radiologist reports focal areas of small bowel wall thickening, mesenteric fat stranding, branching radiolucencies in the liver periphery, and linear gas collections parallel to the small bowel lumen. Based on these imaging findings, which of the following is the most appropriate next step in management?

  1. A
    Broad-spectrum intravenous antibiotics and serial abdominal examinations
  2. B
    CT angiography of the abdomen and pelvis
  3. Emergent exploratory laparotomyCevap
  4. D
    Systemic anticoagulation with intravenous heparin
  5. E
    Colonoscopy

Cevap

Emergent exploratory laparotomy
The correct answer accurately pairs the interpretation of catastrophic CT findings (pneumatosis intestinalis and portal venous gas) with the immediate need for surgical resection. These imaging signs definitively confirm transmural bowel infarction complicating acute mesenteric ischemia. At this stage, emergent exploratory laparotomy is the only appropriate intervention to resect the necrotic tissue and improve survival.

Adım Adım Çözüm

1
Identify the underlying clinical syndrome based on the patient's presentation.
The patient has atrial fibrillation (off anticoagulation), severe abdominal pain out of proportion to a relatively benign physical examination, and elevated lactate, which is highly suspicious for acute mesenteric ischemia.
Recognizing the high pre-test probability of mesenteric ischemia contextualizes the radiologic findings.
2
Interpret the specific radiologic findings provided in the CT report.
Linear gas collections parallel to the bowel lumen represent pneumatosis intestinalis, and branching radiolucencies in the liver periphery represent portal venous gas.
These specific imaging signs indicate that the ischemia has progressed to transmural bowel necrosis (infarction).
3
Determine the most appropriate management step based on the interpreted imaging.
Immediate surgical exploration and resection of the dead bowel via exploratory laparotomy is required.
Once imaging confirms transmural necrosis, further diagnostic imaging or purely medical management will lead to fatal delays.

Anahtar Kavram

Interpreting CT findings of pneumatosis intestinalis and portal venous gas as indicators of transmural bowel necrosis requiring emergent laparotomy.
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Interpreting Imaging Results

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