Observation; pharynx and larynx to esophagus
The pharynx and larynx are observed from endoscope insertion.
If the vomiting reflex is strong, observe it when withdrawing the scope and capture four locations where lesions occur with high frequency.
When the endoscope is inserted into the esophagus and advanced to the vicinity of 30cm of incisors, vomiting reflex often stops.
After that, remove the scope to the mouth side and observe from the upper esophagus.
In the esophagus, observation via scope rotation is important to reduce blind spot.