Failed intubation drill.
Candidates were called to assist a junior registrar in the reintubation of patient with a head and face injury who was known to be a very difficult intubation even before he developed swelling. He has self-extubated and the registrar can’t intubate and is having problems ventilating.
Disclaimer: the viva stem above may be an original CICM stem, acquired from their publicly available past papers. Or, perhaps it is a slightly altered version of the original CICM stem. Or, it is a completely original viva stem, concocted by the monstrously amoral author of Deranged Physiology for nothing more than his own personal amusement. In either case, because the college do not make the main viva text or marking criteria available, almost everything here has been confabulated. It might sound like a plausible viva and it could be used for the purpose of practice, but all should be aware that it does not represent the "true" canonical CICM viva station.