Management of Diverticulitis

Initial Management

For patients with uncomplicated diverticulitis, outpatient management with supportive care (bowel rest and hydration) without routine antibiotics is recommended as the initial approach, according to the American College of Physicians 1, 2, 3
Outpatient treatment is recommended for clinically stable, afebrile patients with uncomplicated diverticulitis, with a low failure rate of only 4.3% and significant cost savings, as suggested by the American College of Physicians 2, 3, 5

Diverticulitis should be classified as uncomplicated (localized inflammation) or complicated (inflammation with abscess, phlegmon, fistula, obstruction, bleeding, or perforation) to guide appropriate management, as recommended by the American College of Physicians 3

Antibiotics should be used selectively rather than routinely in uncomplicated diverticulitis, according to the American College of Physicians and the American Gastroenterological Association 1, 3, 7

Initial trial of non-operative treatment with antibiotics alone is recommended for small abscesses (<4-5 cm), with a pooled failure rate of 20% and mortality rate of 0.6%, as suggested by the World Journal of Emergency Surgery 8
Percutaneous drainage combined with antibiotic treatment is recommended for large abscesses (≥4-5 cm), according to the World Journal of Emergency Surgery and the American College of Surgeons 8, 6

Colonoscopy is recommended 4-6 weeks after resolution of symptoms for patients with complicated diverticulitis or who have not had a high-quality colonoscopy in the past year, as suggested by the American Gastroenterological Association 7

A fiber-rich diet or fiber supplementation is recommended for patients with a history of diverticulitis, according to the American Gastroenterological Association 7
Regular physical activity should be encouraged, and non-aspirin NSAIDs should be avoided when possible, as recommended by the American Gastroenterological Association 7

Overuse of antibiotics in uncomplicated diverticulitis can contribute to antibiotic resistance without providing significant clinical benefit, as warned by the American College of Physicians 1, 3
Failure to recognize predictors of progression to complicated disease, such as symptoms lasting >5 days, vomiting, systemic comorbidity, high CRP levels, and certain CT findings, can lead to delayed recognition of treatment failure, according to the American College of Physicians 1, 2