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Zorluk: ZorGastrointestinal and Abdominal Surgery

A 75-year-old woman with a history of heart failure and atrial fibrillation is brought to the emergency department due to the sudden onset of severe, diffuse abdominal pain. She reports nausea and one episode of non-bloody emesis. Her temperature is 37.8°C (100.0°F), blood pressure is 135/85 mmHg, pulse is 115/min and irregularly irregular, and respiratory rate is 18/min. On physical examination, her abdomen is soft, non-distended, and mildly tender to deep palpation, without rebound tenderness or guarding. Bowel sounds are decreased. Laboratory studies reveal a leukocyte count of 18,000/mm³ and a serum lactate level of 4.5 mmol/L. Arrange the following steps in the most appropriate chronological sequence for the definitive management of this patient.

  1. 1Aggressive intravenous fluid resuscitation and administration of broad-spectrum antibiotics.
  2. 2Computed tomography angiography (CTA) of the abdomen and pelvis.
  3. 3Surgical revascularization via superior mesenteric artery embolectomy.
  4. 4Resection of frankly nonviable bowel segments.
  5. 5Temporary abdominal closure and scheduled second-look laparotomy.

Cevap

The correct chronological sequence is: Aggressive resuscitation, CTA, surgical revascularization, bowel resection, and finally, temporary closure with a planned second-look laparotomy.
The patient's presentation of pain out of proportion to examination findings, elevated lactate, and history of atrial fibrillation is classic for acute mesenteric ischemia. Because she is hemodynamically stable without peritonitis, initial resuscitation is immediately followed by CTA to confirm the diagnosis. Once in the operating room, the surgical principle for mesenteric ischemia is to restore blood flow (embolectomy) before resecting bowel, as ischemic tissue may recover after reperfusion. Finally, because bowel viability can continue to evolve, the abdomen is temporarily closed and a mandatory second-look laparotomy is scheduled for 24-48 hours later.

Adım Adım Çözüm

1
Recognize the clinical presentation of acute mesenteric ischemia (AMI).
Identify pain out of proportion to physical exam and elevated lactate in a patient with atrial fibrillation.
Establishing the suspected diagnosis dictates the immediate need for sequential surgical management.
2
Determine the need for preoperative imaging.
Since the patient lacks peritoneal signs and is hemodynamically stable, CTA is indicated as the next step.
CTA confirms the diagnosis and vascular anatomy; emergent laparotomy without imaging is reserved for patients with frank peritonitis or hemodynamic instability.
3
Sequence the intraoperative steps.
Embolectomy is performed before any bowel resection.
Restoring blood flow first allows borderline ischemic bowel to recover, minimizing the extent of necessary resection and the risk of short bowel syndrome.
4
Determine the postoperative plan.
A temporary closure with a second-look laparotomy is planned.
Bowel viability can evolve over 24-48 hours after ischemic insult and reperfusion, necessitating mandatory re-evaluation.

Anahtar Kavram

In patients with acute mesenteric ischemia, revascularization must precede bowel resection, and a second-look laparotomy is the standard of care.
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Konular

Gastrointestinal and Abdominal Surgery

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