What are the common complications of bowel obstruction that I should be aware of in my practice?

Common complications of bowel obstruction to be aware of in clinical practice include:

• Bowel ischemia and necrosis: Prolonged obstruction can compromise blood flow, leading to ischemia, necrosis, and potential perforation, which significantly increase morbidity and mortality risks NICE CKS.
• Perforation and peritonitis: Obstruction may cause bowel wall perforation, resulting in generalized peritonitis, sepsis, and the need for urgent surgical intervention NICE CKS,NICE NG147.
• Sepsis and systemic infection: Secondary to perforation or bacterial translocation, sepsis is a serious complication requiring prompt recognition and management NICE CKS,NICE NG147.
• Abscess formation: Localized intra-abdominal abscesses can develop, especially in complicated diverticulitis or post-obstructive inflammation, sometimes necessitating drainage or surgery NICE NG147.
• Stricture and fistula formation: Chronic obstruction, particularly in inflammatory bowel diseases like Crohn’s, can lead to strictures and fistulae, complicating management NICE CKS.
• Postoperative complications: After surgical treatment of obstruction, complications such as wound infection, small bowel obstruction, and anastomotic leakage may occur NICE CKS.
• Malnutrition and electrolyte imbalances: Obstruction often leads to vomiting and poor intake, causing dehydration, electrolyte disturbances, and nutritional deficiencies that require correction NICE CKSCosta et al. 2016.
• Recurrence of obstruction: Particularly in malignant or inflammatory causes, there is a risk of recurrent obstruction necessitating ongoing management NICE NG151Zanatto et al. 2022.

Awareness of these complications supports timely diagnosis, appropriate referral, and management decisions in general practice, including urgent hospital admission when signs of systemic infection, perforation, or ischemia are present NICE CKS,NICE NG147Costa et al. 2016.