Review Question - QID 108817

A 14-year-old boy presents to the emergency department with hand pain after falling from his skateboard 1 day ago. He reports that he lost his balance while attempting a new trick and fell on his outstretched hands. He has been icing his hand and taking several tablets of ibuprofen every few hours, but the pain and swelling have not improved. The patient reports that he has not been able to use his hand to take notes in school. His past medical history is significant for infectious mononucleosis last year and type 1 diabetes mellitus for which he has an insulin pump. His temperature is 98.6°F (37°C), blood pressure is 114/72 mmHg, pulse is 82/min, and respirations are 12/min. On physical exam, there is mild swelling over the dorsal aspect of the hand and wrist. He has tenderness in the region between the extensor pollicus longus and the extensor pollicus brevis of the right hand. Which of the following is the most appropriate next step in management?