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Zorluk: Çok zorGastrointestinal and Abdominal Surgery

A 71-year-old man presents to the emergency department with a 5-day history of progressive abdominal distension, cramping abdominal pain, and obstipation. His past medical history is significant for hypertension and type 2 diabetes mellitus. Vital signs show a blood pressure of 135/85 mm Hg, heart rate of 92/min, respiratory rate of 16/min, and temperature of 37.4°C (99.3°F). Physical examination reveals a markedly distended, tympanitic abdomen. There is diffuse mild tenderness but no guarding, rigidity, or rebound tenderness. Digital rectal examination is empty. Laboratory studies show a blood urea nitrogen of 42 mg/dL and a serum creatinine of 1.8 mg/dL (baseline 0.9 mg/dL). Plain abdominal radiography demonstrates massive dilation of the transverse and descending colon with a sudden cutoff in the sigmoid region, without pneumoperitoneum. Arrange the following interventions in the most appropriate sequential order for the optimal management of this patient, anticipating the most likely underlying etiology.

  1. 1Intravenous crystalloid resuscitation, electrolyte correction, and nasogastric tube decompression
  2. 2Computed tomography (CT) scan of the abdomen and pelvis with intravenous contrast
  3. 3Endoscopic placement of a self-expandable metal stent (SEMS)
  4. 4Medical optimization, nutritional support, and administration of mechanical bowel preparation
  5. 5Elective oncologic segmental resection with primary anastomosis

Cevap

The correct sequence for managing a stable left-sided malignant large bowel obstruction is: initial resuscitation, followed by CT imaging to confirm the diagnosis, endoscopic stenting as a bridge to surgery, medical optimization with bowel preparation, and finally an elective single-stage surgical resection.
The algorithm for a hemodynamically stable patient presenting with a left-sided large bowel obstruction (most commonly due to malignancy) focuses on converting an emergent surgical crisis into an elective procedure. Initial medical resuscitation (fluids, NGT) addresses the acute physiologic derangement. A CT scan is mandatory to confirm the diagnosis and rule out ischemia or perforation. Once an uncomplicated left-sided malignant obstruction is identified, endoscopic placement of a self-expandable metal stent (SEMS) is the preferred 'bridge to surgery.' This relieves the obstruction, allowing the patient to resume enteral intake and undergo proper mechanical bowel preparation. Finally, the patient can undergo a safe, elective, single-stage oncologic resection with a primary anastomosis, avoiding a permanent or temporary stoma.

Adım Adım Çözüm

1
Identify the clinical presentation and initial triage requirements.
The patient has signs of a large bowel obstruction with prerenal AKI, requiring immediate medical stabilization via IV fluids and nasogastric decompression.
Initial resuscitation is universally the first step in surgical emergencies to restore perfusion and correct metabolic derangements.
2
Determine the appropriate diagnostic modality.
CT scan of the abdomen and pelvis with IV contrast is selected.
CT is highly sensitive for locating the transition point, staging the presumed malignancy, and evaluating for complications like ischemia or perforation that would mandate immediate surgery.
3
Select the acute intervention for an uncomplicated left-sided malignant obstruction.
Endoscopic placement of a self-expandable metal stent (SEMS) is chosen.
SEMS safely decompresses the colon in stable patients without peritonitis, avoiding an emergent laparotomy and the creation of a stoma (Hartmann procedure).
4
Prepare the patient for definitive surgical treatment.
Medical optimization and mechanical bowel preparation are performed.
With the obstruction relieved by the stent, the patient can safely undergo standard preoperative preparation, including bowel prep which is strictly contraindicated during an acute obstruction.
5
Choose the definitive surgical management.
Elective oncologic resection with primary anastomosis.
A single-stage procedure can now be performed with lower morbidity because the bowel is decompressed, tissue edema has resolved, and the colon is clean.

Anahtar Kavram

Management of Malignant Large Bowel Obstruction (Bridge to Surgery)
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Konular

Gastrointestinal and Abdominal Surgery

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