Review Question - QID 219187

A 14-year-old male presents to the emergency department via ambulance. The EMTs report that he was thrown from the back of an all-terrain vehicle and has been complaining of profound right hip pain. It is currently 10:25 PM; the EMTs report that the accident happened at approximately 6:30 PM, but due to the injury location in the desert, the transfer was delayed. There are no open wounds, and the patient's right lower extremity is shortened and externally rotated. Radiographs are obtained, and a select image is available for review in Figure A. Which of the following factors is most important in minimizing the patient's chances of developing femoral head avascular necrosis?