Paramedics bring a 28-year-old construction worker to the emergency department following a 15-foot (4.5-meter) fall from scaffolding. He is conscious but reports intense pain across his entire abdomen. Vital signs reveal a blood pressure of 82/50 mmHg, a heart rate of 128/min, and a respiratory rate of 24/min. Pulse oximetry is 96% on ambient air. Primary evaluation demonstrates an intact airway with bilateral breath sounds present and equal. No obvious sources of external blood loss are identified. Abdominal examination reveals marked distension, diffuse tenderness, and involuntary guarding. The pelvis is mechanically stable to manual compression. A bedside ultrasound examination (FAST) demonstrates a large anechoic collection in Morison's pouch. Which of the following is the most appropriate next step in management?
- AHelical CT scanning of the abdomen and pelvis
- BPeritoneal fluid aspiration and laboratory analysis
- Transfer to the operating room for abdominal explorationCevap
- DRetrograde urethrography followed by pelvic radiography
- ERapid intravenous crystalloid infusion with serial abdominal evaluations