A 28-year-old woman is brought to the emergency department 45 minutes after being found with a ligature (dupatta) tightly wound around her neck by her husband during a domestic dispute. She is conscious, alert, and breathing spontaneously with stridor. Examination shows bilateral neck swelling, subcutaneous emphysema, and a palpable crepitus over the larynx. Neck veins are engorged. What is the most appropriate next step in management?