A 56-year-old man undergoes an emergent partial colectomy with primary anastomosis for ischemic colitis. Over the first four days following the procedure, his recovery is unremarkable and he transitions to a clear liquid diet. On the morning of his fifth hospital day, he reports new-onset lower abdominal discomfort, tenesmus, and frequent, small-volume loose stools. His temperature is 38.9°C (102°F), blood pressure is 128/82 mmHg, heart rate is 108/min, and respiratory rate is 16/min. Physical examination demonstrates a clean, well-approximated midline surgical incision without fluctuance, drainage, or erythema. There is localized tenderness in the suprapubic region. Digital rectal examination reveals a boggy, highly tender fullness anteriorly. Laboratory studies show a leukocyte count of 18,500/mm³. Which of the following is the most appropriate next step in the management of this patient?
- Contrast-enhanced cross-sectional imaging of the abdomen and pelvisCevap
- BBedside opening of the surgical incision and wound exploration
- CEmpiric escalation of broad-spectrum antimicrobial therapy
- DUrgent return to the operating room for exploratory laparotomy
- ECollection of stool specimens for bacterial culture and toxin assay