Examkin

Soru

Zorluk: ZorGastrointestinal and Abdominal Surgery

A 67-year-old woman is evaluated by the rapid response team on the medical-surgical floor due to sudden clinical deterioration. She was admitted 24 hours ago for a partial small bowel obstruction secondary to severe adhesive disease from a prior open colectomy. Initial conservative management included intravenous fluid resuscitation and nasogastric tube decompression, which yielded 800 mL of bilious output. Over the last hour, she developed severe, unrelenting, constant lower abdominal pain, which is a significant change from her previous intermittent, cramping pain. Her vital signs are temperature 38.6°C (101.5°F), blood pressure 92/58 mm Hg, pulse 122/min, and respirations 24/min. Physical examination now reveals a distended, exquisitely tender abdomen with marked rigidity and rebound tenderness in the lower quadrants. Laboratory studies demonstrate a leukocyte count of 18,400/mm³ with 12% bands, and a serum lactate of 4.1 mmol/L. Which of the following is the most appropriate next step in the management of this patient?

  1. Immediate exploratory laparotomyCevap
  2. B
    Computed tomography of the abdomen and pelvis with intravenous contrast
  3. C
    Administration of a water-soluble oral contrast agent and serial abdominal radiographs
  4. D
    Initiation of broad-spectrum intravenous antibiotics and continued observation
  5. E
    Endoscopic decompression of the gastrointestinal tract

Cevap

Immediate exploratory laparotomy
The correct response is immediate exploratory laparotomy. This patient initially presented with a partial small bowel obstruction and was appropriately triaged to a conservative management pathway. However, her clinical picture has abruptly deteriorated. The transition of her pain from colicky/cramping to severe and constant, combined with the development of systemic inflammatory response (fever, tachycardia, leukocytosis with a left shift), hemodynamic instability (hypotension), metabolic derangement (lactic acidosis), and peritonitis (rigidity, rebound tenderness) are classic signs of a strangulated small bowel obstruction. Strangulation occurs when the blood supply to the obstructed bowel segment is compromised, leading to ischemia, necrosis, and eventual perforation. Once clinical signs of strangulation or peritonitis are present, conservative management must be immediately abandoned. Urgent surgical exploration is required to resect any necrotic bowel and restore gastrointestinal continuity.

Adım Adım Çözüm

1
Identify the initial presentation and management plan.
The patient initially presented with an uncomplicated adhesive small bowel obstruction and was appropriately managed with conservative measures (bowel rest, nasogastric tube, intravenous fluids).
Establishing the baseline helps accurately interpret the significance of the subsequent clinical changes.
2
Analyze the change in the patient's clinical status.
The patient developed a transition from crampy to severe, constant pain, accompanied by fever, hypotension, tachycardia, rigid abdomen (peritonitis), leukocytosis with bandemia, and lactic acidosis.
These findings represent the 'hard signs' of bowel strangulation and ischemia, differentiating it from a simple mechanical obstruction.
3
Determine the definitive management protocol based on the clinical shift.
The presence of peritonitis and hemodynamic instability in the setting of a small bowel obstruction mandates abandoning conservative therapy in favor of immediate surgical exploration.
Strangulated bowel rapidly progresses to necrosis, perforation, and overwhelming sepsis; time-consuming diagnostic imaging or continued medical management increases mortality.

Anahtar Kavram

Patients with a small bowel obstruction who develop signs of strangulation or ischemia (e.g., constant severe pain, peritonitis, fever, tachycardia, hemodynamic instability, metabolic acidosis) require immediate exploratory laparotomy rather than continued conservative management or further diagnostic imaging.
Bu soruyu puanla

Konular

Gastrointestinal and Abdominal Surgery

Bu konudan daha fazla soru