A 34-year-old male who was trapped in a burning building for several minutes has been brought to the emergency department. Upon arrival, the patient presents with hoarseness, singed nasal hairs, soot around the mouth and nose, and stridor. What is the next most appropriate step in the management of this patient?
Prepare for early intubation
Perform a complete bronchoscopy
Administer heated humidified oxygen
Administer corticosteroids