Review Question - QID 210120

A 3-year-old previously healthy male presents to the emergency department with right elbow pain after falling from a swing one hour prior. On physical exam, there is a gross elbow deformity, no skin puckering, moderate swelling, and no evidence of a poke hole. He is able to wiggle all fingers but is crying and not cooperative with sensory exam. His hand is pale and pulses are markedly diminished from the contralateral extremity. What is likely to be his definitive treatment?