A 26-year-old woman was hit by a car and
brought to the trauma bay with a blood pressure of 62/40 mm Hg. On examination, she
was unresponsive, her pupils were equally
round and reactive, her distal pulses were
weak, and her extremities were cold. X-ray of
the chest was taken and was normal. Peritoneal
lavage showed no blood in the abdomen. After
receiving 2 L of lactated Ringer’s solution, her
blood pressure was 71/46 mm Hg. The pelvis
was unstable with compression, and an anteroposterior x-ray of the pelvis confirmed a pelvic
fracture. What is the next best step in management?