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Related Experiment Video

Updated: Jun 12, 2026

One-anastomosis Gastric Bypass (OAGB) in Rats

One-anastomosis Gastric Bypass (OAGB) in Rats

Published on: November 10, 2018

Intrathoracic Pouch Migration after Gastric Bypass: A Systematic Review.

Mohammad Kermansaravi¹, Ali Esparham², Maurizio De Luca³

¹Department of Surgery, Minimally Invasive Surgery Research Center, Division of Minimally Invasive and Bariatric Surgery, Hazrat-e Rasool Hospital, Iran University of Medical Sciences, Tehran, Iran. mkermansaravi@yahoo.com.

Obesity Surgery

|June 10, 2026

Summary

Intrathoracic pouch migration (ITM) after gastric bypass is a growing concern, often causing GERD. Selective repair strategies, like hiatoplasty with ligamentum teres augmentation, reduce recurrence compared to simple hiatal repair.

Keywords:

Hiatal hernia One anastomosis gastric bypass Pouch migration Roux-en-Y gastric bypass

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Last Updated: Jun 12, 2026

One-anastomosis Gastric Bypass (OAGB) in Rats

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Area of Science:

Bariatric Surgery
Gastrointestinal Surgery
Surgical Complications

Background:

Intrathoracic pouch migration (ITM) is an emerging complication following Roux-en-Y gastric bypass (RYGB) and one-anastomosis gastric bypass (OAGB).
ITM is frequently linked to hiatal hernias and presents with gastroesophageal reflux disease (GERD), dysphagia, and other functional symptoms.

Conclusions:

ITM is an increasingly recognized complication of RYGB and OAGB, strongly associated with GERD and functional symptoms.
Current evidence is limited and observational; routine hiatal hernia repair is not recommended.
Selective, anatomy-driven repair strategies, specifically hiatoplasty with ligamentum teres augmentation for revisional cases, appear most effective in reducing ITM recurrence.