U-turn; observation from gastric fundus to gastric body
After observing up to the cardia with a J turn, further rotate the scope and perform a U turn observation throughout the fundus.
Note that during a U turn observation, left and right are reversed compared to a J turn observation, meaning the right side on image is the anterior wall and the left side is the posterior wall.
After U-turn observation of the fundus, while withdrawing the scope, cancel the up angle and rotate left to return to observing the posterior wall while looking down on the fundus greater curvature. Here, maximum air is supplied and folds stretched firmly for the observation of the body upper-mid fundus greater curve. Advance to the body lower part while moving the scope to the anterior-posterior wall in the greater curve center.
Finally, invert to capture the hidden middle body – angle anterior and posterior walls.
This completes endoscopic observation.