system
Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
A 56-year-old man is brought to the emergency department for the evaluation of a 3-day history of left lower abdominal pain. During this period, the patient has also had a low-grade fever and has not had a bowel movement. He has a history of constipation. He underwent a cholecystectomy at the age of 53 years. He has smoked one pack of cigarettes daily for the last 30 years. His temperature is 38.8°C (101.8°F), pulse is 80/min, respirations are 18/min, and blood pressure is 130/84 mm Hg. Cardiopulmonary examination shows no abnormalities. Abdominal examination shows left lower quadrant tenderness with no guarding or rebound. There is no edema of his lower extremities. CT of the abdomen with contrast shows segmental wall thickening of the descending colon with multiple diverticula, surrounding fat stranding, and a 5.5-cm, low-attenuating pelvic fluid collection. Intravenous fluids and bowel rest are started. Treatment with intravenous morphine, ciprofloxacin, and metronidazole is begun. Which of the following is the most appropriate next step in the management of this patient?
assistant
CT-guided percutaneous abscess drainage