An unresponsive 2-year-old male fell eight feet from a slide…

An unresponsive 2-year-old male fell eight feet from a slide at a city park. You observe a hematoma to his occiput. His skin above his axilla is pale and diaphoretic, and pink and dry below. His left forearm is obviously fractured. His vital signs are P 156, R 48, and his capillary refill is less than two seconds. Prior to transport, you should administer oxygen and: