Review Question - QID 109585

A 9-year-old boy is brought to the emergency department by his mother. The boy fell off his skateboard and has complained of right arm pain since the incident. The boy has a past medical history of celiac disease. His current medications include a multivitamin, vitamin D, and nutritional shakes. Radiography performed in the emergency department reveals the finding in Figure A. The patient's arm is treated, placed in a cast, and he is discharged home. The patient returns to the emergency department the next day complaining of pain in his right arm. The patient's cast is removed. His right arm is tender to palpation, and severe pain is elicited when his fingers and wrist are moved. There is a decrease in sensation over his hand. The patient's arm and forearm are firm and his brachial and radial pulse are palpable. His measured compartment pressure is 24 mmHg (normal < 30 mmHg) in his right arm. Which of the following is the most appropriate management of this patient's presentation?