MedBugs: SAQ #285

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Case: Nitrous oxide inhalation injury

A 21-year-old man presents one hour after inhaling nitrous oxide directly from a medical-grade canister. He develops throat and chest pain with coughing. Vitals on arrival : GCS 15, Temp 36.7, HR 112, BP 118/75, RR 28, Sats 98% RA

1. Please describe and interpret the relevant image findings. 2 marks

2. With regard to his chest pain, list three possible complications of acute barotrauma. 3 marks

He remains clinically stable during the rest of your shift and is awaiting transfer to ICU for ongoing airway observation.

3. List four changing clinical features that should prompt re-discussion with anaesthetics. 4 marks

4. List three relative contraindications to nitrous oxide use during procedures. 3 marks

5. Give three commonly used slang terms for recreational nitrous oxide in Australia. 3 marks

6. List three complications of chronic nitrous oxide misuse. 3 marks

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