A 44 year old construction worker escaped from a burning building following a propane tank explosion and subsequent fire. Rescue workers immediately removed his smoldering shirt. He was placed on oxygen, and transported to the emergency department. On physical exam the patient is tachypneic, oxygen saturation is 92% on a non-rebreather facemask, and he has coarse rales bilaterally. He has blistering burns to the anterior chest, arms, and face. What is the appropriate next step in this patient's management