Diagnostic Workup and Management of Diverticulitis

Clinical Presentation and Diagnosis

CT findings include diverticula, colonic wall thickening, increased density of pericolic fat, and in complicated cases: abscess, free intraperitoneal fluid, extraluminal gas, or perforation, as reported by the World Journal of Emergency Surgery 1, 2
Point-of-care ultrasound (POCUS) can identify wall thickening, non-compressibility, loss of peristalsis, and complications like abscess or free air in patients unable to undergo CT, according to the World Journal of Emergency Surgery 1

For immunocompetent patients with uncomplicated diverticulitis, observation without antibiotics is the recommended first-line treatment, as suggested by Praxis Medical Insights 3, 2
Antibiotics do not accelerate recovery, prevent complications, or reduce recurrence rates in immunocompetent patients with uncomplicated diverticulitis, as reported by the World Journal of Emergency Surgery 1 and Gastroenterology 4

For abscesses <4 cm, antibiotic therapy alone for 7 days is recommended, while for abscesses ≥4-5 cm, percutaneous drainage combined with antibiotic therapy for 4 days is suggested, according to the World Journal of Emergency Surgery 6 and Praxis Medical Insights 2, 3
Patients with generalized peritonitis require emergent laparotomy with colonic resection, and IV antibiotics such as piperacillin-tazobactam, meropenem, or ceftriaxone plus metronidazole, as recommended by Praxis Medical Insights 5

Outpatient treatment is appropriate for patients with uncomplicated diverticulitis who can tolerate oral intake, have no significant comorbidities or frailty, and have adequate home support, as suggested by Praxis Medical Insights 3
Hospitalization is required for patients with complicated diverticulitis, inability to tolerate oral intake, severe pain or systemic symptoms, significant comorbidities or frailty, or immunocompromised status, according to Praxis Medical Insights 3, 2

A high-quality diet high in fiber from fruits, vegetables, whole grains, legumes, and low in red meat and sweets can help prevent recurrence, as recommended by Praxis Medical Insights 3
Regular physical activity, achieving or maintaining normal body mass index, avoiding smoking, and avoiding regular use of NSAIDs and opioids can also help prevent recurrence, as suggested by Praxis Medical Insights 3 and Gastroenterology 4