Superior Esophagic Sphincter. Observed through trans-fistula-gastrostomy retrograde endoscopy. The endoscope was advanced to overcome the sphincter observing the nasopharynx then passing by the...
The video clip displays a complete retroflexed maneuver from the cardias to the upper esophagic sphincter, the video clip also shows a big hiatal hernia with reflux esophagitis. An endoscopist must...
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