Accompanied by her daughter, a 61-year-old female is evaluated in the surgical assessment unit due to three days of worsening left lower abdominal pain, chills, and anorexia. Her past medical history is notable for hypertension and hyperlipidemia. Vital signs show a temperature of 38.8°C (101.8°F), heart rate of 102/min, blood pressure of 128/78 mm Hg, and respiratory rate of 16/min. Physical examination reveals focal tenderness and voluntary guarding in the left lower quadrant, but no generalized rigidity or diffuse rebound tenderness. Laboratory studies demonstrate a leukocyte count of 16,500/mm³ with a left shift. A contrast-enhanced computed tomography scan of the abdomen and pelvis reveals severe sigmoid diverticulitis accompanied by a 6.5-centimeter unilocular fluid collection adjacent to the inflamed bowel segment. Based on current surgical guidelines, arrange the following steps in the most appropriate sequential order for the comprehensive management of this patient.
- 1Initiate bowel rest, intravenous fluid hydration, and empiric broad-spectrum antimicrobial therapy.
- 2Consult interventional radiology for image-guided percutaneous drainage of the fluid collection.
- 3Observe for clinical improvement, monitor drain output, and remove the catheter once drainage is minimal.
- 4Schedule an interval elective sigmoid resection with primary anastomosis.