Management of Suspected Bowel Perforation

Immediate Management

The American College of Surgeons recommends immediate NPO status and gastric decompression for suspected bowel perforation, regardless of whether definitive perforation or pseudoperitoneum is identified, to reduce the risk of further peritoneal contamination and optimize surgical outcomes 1, 2
Aggressive intravenous fluid resuscitation should be initiated immediately, along with broad-spectrum antibiotics covering gram-negative, gram-positive, and anaerobic organisms, and correction of electrolyte imbalances during resuscitation 1, 2, 6
A nasogastric tube should be placed for gastric decompression to minimize insufflation and prevent further spillage through any perforation site 1

The World Journal of Emergency Surgery recommends obtaining an urgent CT scan with IV contrast immediately to detect small amounts of free air and identify the perforation site, as it is more sensitive than plain radiographs 8, 1, 2
Plain radiographs have a positive predictive value of 92% for perforation but can miss early or small perforations 8
Consider repeat CT scan at 12-48 hours if initial imaging is equivocal, as sensitivity for bowel perforation increases from 30% to 82% on follow-up imaging 7

Conservative management may be considered only when the patient is hemodynamically stable, has localized peritoneal signs, no contrast extravasation on water-soluble contrast study, no diffuse peritonitis or frank peritoneal signs, minimal peritoneal contamination on imaging, and is immunocompetent, and less than 70 years old 4, 1, 2, 6
The World Journal of Emergency Surgery recommends surgical management for patients with hemodynamic instability, diffuse peritonitis, significant pneumoperitoneum, extraluminal contrast extravasation, immunocompromised status, multiple perforations, or severe peritoneal contamination 3, 5, 1, 2

Every hour of surgical delay increases mortality by 2.4% compared to the previous hour over the first 24 hours after admission, and surgery should be performed as early as possible, ideally within 24 hours 5, 1
Delayed surgical intervention beyond 24 hours increases complication rates and hospital length of stay 7, 2

Elderly patients (> 70 years) are less likely to respond to conservative management and experience higher mortality if non-operative management fails, and require surgical management 4, 5
Immunocompromised patients and transplant recipients require surgical management regardless of perforation size 1, 2