Transverse views of the lower anterior neck. The aim is to visualise the trachea and oesophagus, so that during tracheal intubation, inadvertent oesophageal intubation may be identified and immediately corrected.
A 28 year old with reduced GCS after several seizures requires intubation. Their neck extension seems limited and you wonder whether this may be a difficult intubation. You decide to monitor it with ultrasound.