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Updated: Mar 28, 2026

A Protocol for Roux-en-Y Gastric Bypass in Rats using Linear Staplers
Published on: August 21, 2021
Lower Esophageal Magnetic Sphincter Augmentation for Persistent Reflux After Roux-en-Y Gastric Bypass
Juan A Muñoz-Largacha1, Donald T Hess2, Virginia R Litle3
1Department of Surgery, Division of Thoracic Surgery, Boston University School of Medicine, 72 East Concord St., Boston, MA, 02118, USA. jamunoz@bu.edu.
Abstract:
Laparoscopic Roux-en-Y gastric bypass (LRYGB) is a good option for the treatment of gastroesophageal reflux disease (GERD) in the obese population. However, some patients have significant reflux despite this procedure, and their treatment might be challenging. Laparoscopic lower esophageal magnetic sphincter augmentation (MSA) has been introduced into clinical practice with encouraging results. Currently, MSA is only approved for patients with hiatal hernias that are less than 3 cm and without history of antireflux procedures. We present two cases of MSA for the treatment of persistent GERD after LRYGB. Since this is an off-label use of this procedure, both patients underwent extensive evaluation before proceeding with surgery. Excellent results were obtained with a significant improvement in symptoms as well as their GERD Health-Related Quality of Life scores.
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