A 60-year-old man is hit by a pickup truck and brought to the emergency department with a blood pressure of 70/0 mm Hg. Peritoneal lavage showed no blood in the abdomen. The blood pressure is elevated to 85 systolic following the administration of 2 L of Ringer's lactate. An x-ray showed a pelvic fracture. What is the next step in management?
Exploratory laparotomy with packing of the pelvis CT scan of the pelvis External fixation of the pelvis Open reduction and internal fixation (ORIF) of the pelvis