Review Question - QID 219902

A 24-year-old male is using a waterjet cutting tool when he gets distracted, and the waterjet hits his ungloved right hand. He is brought to the ER, where he is diagnosed with a high-pressure injection injury. The patient complains of pain and paresthesias in his hand but is able to weakly flex and extend all of his fingers. Antibiotic and tetanus prophylaxis is administered, and the patient is admitted for observation. Four hours later, he begins complaining of increasingly severe hand pain that is not relieved with increasing doses of pain medication. Which of the following is the next best step?