Management of Acute Severe Ulcerative Colitis

Initial Assessment and Treatment

The American Gastroenterological Association recommends immediate initiation of intravenous corticosteroids (hydrocortisone 100 mg four times daily OR methylprednisolone 40-60 mg daily) along with aggressive supportive care for hemodynamically stable patients presenting with acute severe ulcerative colitis, without waiting for stool culture results or other screening tests 1, 2
Disease severity can be classified using Truelove and Witts' criteria, which defines severe disease as bloody stool frequency ≥6/day plus at least one of: tachycardia >90/min, temperature >37.8°C, hemoglobin <10 g/dL, or ESR >30 mm/h (CRP >30 mg/L can substitute) 1
Baseline laboratory tests, including complete blood count, CRP, albumin, urea, electrolytes, and liver function tests, should be obtained 2

Unprepared flexible sigmoidoscopy with biopsies should be performed to confirm diagnosis, assess severity, and exclude cytomegalovirus infection 1, 2
Stool cultures and testing for Clostridium difficile toxin should be obtained, as it is more prevalent in severe UC and associated with increased morbidity and mortality 2

Intravenous corticosteroids should be started immediately, with a treatment duration limited to 7-10 days maximum, as extending beyond this carries no additional benefit 1, 2
The overall response rate to IV corticosteroids is 67%, with 33% requiring colectomy 1, 2
Essential supportive care includes administering adequate volume of intravenous fluids with electrolyte replacement, including potassium supplementation of at least 60 mmol/day to prevent hypokalemia and toxic dilatation 3, 2
Subcutaneous low-molecular-weight heparin should be initiated for thromboprophylaxis immediately, as rectal bleeding is not a contraindication 3, 2

Emergency surgical exploration is mandatory in scenarios such as hemodynamically unstable patients, colonic perforation with generalized peritonitis, toxic megacolon complicated by perforation, massive bleeding, clinical deterioration, or signs of shock 4, 5, 2
Subtotal colectomy with ileostomy is the surgical treatment of choice for acute severe ulcerative colitis patients presenting with massive colorectal hemorrhage or non-responders to medical treatment 4, 5, 6

Delaying corticosteroid treatment while waiting for stool microbiology results should be avoided 2
Delaying surgery in critically ill patients with toxic megacolon increases the risk of perforation with high mortality 4, 7, 1
Extending IV corticosteroids beyond 7-10 days without escalating to rescue therapy or surgery should be avoided 1