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You are caring for a 4 year old child struck by a car. The child has significant maxillofacial trauma, a large parietal hematoma, and a GCS score of 7. Attempts to intubate with direct and video laryngoscopy have been unsuccessful due to blood obscuring visualization of the airway, and you are only partially able to oxygenate and ventilate the child with bag-mask ventilation, with an O2 sat on 100% FiO2 of 80%.

What is your best next intervention?