A 46-year-old man is brought from a house fire with burns to his face and upper chest. He is awake, has soot around his mouth and is coughing; initially his voice was normal, but over the last 20 minutes it has become husky and he now has noisy inspiration. His oxygen saturation is 98% while receiving oxygen through a non-rebreather mask. Which one of the following should be undertaken first?
Keep going — a set of ten like this one, one at a time.
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