A 6-year-old child is brought on board after being involved in a high-speed motor vehicle collision. The child is unresponsive, has a Glasgow Coma Scale (GCS) of 6, and shows signs of increased intracranial pressure (ICP). What is the MOST appropriate initial step?
Secure the airway with rapid sequence induction (RSI) and intubation.
Perform needle decompression of the chest.
Administer hypertonic saline to decrease intracranial pressure.
Administer mannitol to reduce intracranial pressure.