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ASGE DDW Videos from Around the World | 2026
U2-POEM- A NOVEL UNDERWATER UNIDIRECTIONAL MYOTOMY ...
U2-POEM- A NOVEL UNDERWATER UNIDIRECTIONAL MYOTOMY TECHNIQUE
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Video Transcription
Video Summary
This case series describes <strong>u-square POEM</strong>, a novel underwater, unidirectional myotomy technique for esophageal motility disorders. In four patients, the procedure was performed entirely under saline, eliminating gas insufflation and the submucosal tunneling step. The team found that <strong>Endocut-U</strong> was a practical cutting mode, and a <strong>long ESD knife with a T-shaped tip and strong water jet</strong> worked well underwater. No adverse events occurred, and all patients went home the same day with marked symptom improvement. The technique may reduce gas-related complications and shorten procedure time.
Asset Subtitle
Endoscopy in Action
Submitted by Mouen Khashab
Keywords
u-square POEM
underwater myotomy
esophageal motility disorders
Endocut-U
ESD knife water jet
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