Review Question - QID 218584

A 16-month-old male is being evaluated for leg pain in the emergency department. He is accompanied by his younger brother, his mother and her boyfriend. The patient's family states that 2 hours before presentation, the patient was outside chasing a butterfly when he slipped off a 10-inch high deck. Following his fall, he was inconsolable and unable to bear weight. On examination, the patient is tender to palpation along the entirety of his left lower extremity, and diffuse ecchymosis and swelling are present. His radiographs are available for review in Figures A and B. Which of the following is the next best step in the management of this patient?