Acute mechanical large bowel obstruction should be operated early because of the risk of -: (A) Respiratory embarrassment due to abdominal distension, (B) Electrolyte imbalance from vomiting, (C) Septicaemia from bowel contents, (D) Closed-loop obstruction and caecal perforation
Answer is D. • Virtually all patients with complete acute large bowel obstruction require prompt surgical intervention and should not undergo a trial of non-operative management
• Acute large bowel obstruction in patients with competent ileocecal valve is a true surgical emergency because of high chances of perforation (MC site: Cecum) 
• Once diagnosis has been made, surgical exploration should be undertaken as soon as possible after appropriate resuscitation