A 32-year-old male presents to the emergency department 6 hours after a crush injury to the right leg from a fallen beam at a construction site in Delhi. He complains of severe pain in the anterior compartment of the leg that is disproportionate to the clinical findings and is not relieved by analgesics. On examination, pain is elicited on passive dorsiflexion of the foot. Pedal pulses are present bilaterally. What is the most appropriate next step in management?