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Review Question - QID 104585

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QID 104585 (Type "104585" in App Search)
A 76-year-old woman is brought to the emergency department after being found unresponsive in her room at her nursing facility. Past medical history is significant for Alzheimer's disease, hypertension, and diabetes. Surgical history is notable for an open cholecystectomy at age 38 and multiple cesarean sections. On arrival, she is non-responsive but breathing by herself, and her vital signs are T 102.9 F, HR 123 bpm, BP 95/64, RR 26/min, and SaO2 97% on 6L nasal cannula. On physical exam the patient has marked abdominal distension and is tympanic to percussion. Laboratory studies are notable for a lactic acidosis. An upright abdominal radiograph and CT abdomen/pelvis with contrast are shown in Figures A and B respectively. She is started on IV fluids and a nasogastric tube is placed to suction which returns green bilious fluid. Repeat vitals 1 hour later are T 101F, HR 140 bpm, BP 75/44, RR 30/min, and SaO2 is 100% on the ventilator after she is intubated for airway concerns. What is the next best step in management?
  • A
  • B

Therapy with levofloxacin and metronidazole

0%

0/10

Immediate laparotomy and surgical management

60%

6/10

Continue IV fluid hydration, nasogastric suction, NPO

30%

3/10

Pneumatic enema

10%

1/10

Sigmoidoscopy, attempted derotation and rectal tube placement

0%

0/10

  • A
  • B

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This patient with an extensive surgical history presents with a small bowel obstruction and likely small bowel ischemia. After worsening on conservative therapy, immediate surgical management is required, with laparotomy being the approach of choice.

Small bowel obstructions account for around 15% of all surgical admissions in the United States. Adhesive disease, typically secondary to previous surgery, accounts for around 75% of all small bowel obstructions, with malignancy and hernias accounting for another 16% combined. Conservative management with nasogastric suction, IV fluid hydration, and bowel rest is an appropriate first strategy for patients who present without evidence of peritonitis and who are hemodynamically stable. Patients who fail conservative management or who present with more advanced disease require immediate surgical management.

Jackson et al. discuss the diagnosis and management of intestinal obstructions in adults. They conclude that in the hemodynamically stable patient, IV fluid hydration, nasogastric intestinal decompression, and bowel rest is an appropriate first strategy to attempt to resolve the obstruction. However, hemodynamically unstable patients, patients with perforations or ischemic gut, and patients who fail conservative management require surgical intervention.

O'Connor et al. discuss the growing role of laparoscopic surgical approaches for acute small bowel obstruction. They conclude that with the limited literature available, laparoscopic lysis of adhesions is an appropriate approach for the treatment of adhesive small bowel disease. In this study, ~30% of laparoscopic approaches were converted to midline laparotomies. Laparoscopy was associated with reduced morbidity and length of hospital stay. Further studies that randomize patients to open vs. laparoscopic surgical approaches are required to further elucidate the outcomes of these two approaches.

Figure A shows a partially upright abdominal radiograph with dilated loops of small bowel and air fluid levels, consistent with a small bowel obstruction. Figure B shows an axial reconstruction of an abdominal CT scan, showing dilated loops of small bowel. Red arrow is pointing at an air fluid level. Illustration A shows an abdominal radiograph with significantly dilated sigmoid colon, with a characteristic coffee bean sign highly suggestive of sigmoid volvulus and obstruction.

Incorrect Answers
Answer 1: Broad spectrum antibiotics is not an appropriate strategy for management of small bowel obstruction.

Answer 3: Continuing conservative management with IV fluid hydration, NG suction, and NPO is appropriate in hemodynamically stable patients, but this patient presents with worsening shock.

Answer 4: Pneumatic enema is the procedure of choice for patients with intussusception, as it is both diagnostic and therapeutic. It has no role in the management of adhesive small bowel obstructions.

Answer 5: Sigmoidoscopy with attempted derotation is a reasonable approach to patients presenting with sigmoid volvulus. These patients can present similarly to those with a small bowl obstruction; however, this patient's radiograph is suggested of a small bowel source. See Illustration A

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