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?
Perform a complete bronchoscopy
Prepare for early intubation
Administer corticosteroids
Administer heated humidified oxygen