A 16-year-old adolescent boy with a history of cystic fibrosis complicated by severe bronchiectasis is brought to the emergency department after coughing up copious amounts of bright red blood at home. In the triage room, he expectorates approximately 250 mL of blood into an emesis basin over 15 minutes. He appears pale, anxious, and is in moderate respiratory distress. Vital signs are temperature 37.1°C (98.8°F), heart rate 138/min, blood pressure 92/58 mmHg, respiratory rate 30/min, and oxygen saturation 86% on room air. Lung auscultation reveals coarse crackles and gurgling sounds predominantly over the right hemithorax, with relatively clear breath sounds on the left. Arrange the following acute management steps in the most appropriate sequential order.
- 1Place the patient in the right lateral decubitus position
- 2Secure the airway via endotracheal intubation with a large-bore tube
- 3Perform bronchoscopy to localize bleeding and clear airway clots
- 4Perform selective bronchial artery embolization