A laparoscopic one anastomosis gastric bypass with wrapping versus nonwrapping fundus of the excluded part of the stomach to treat obese patients (FundoRingOAGB trial): study protocol for a randomized controlled trial

A Randomized Controlled Trial of Acid and Bile Reflux Esophagitis Prevention by Modified Fundoplication of the Excluded Stomach in One-Anastomosis Gastric Bypass: 1-Year Results of the FundoRing Trial

BACKGROUND

The advantages and disadvantages of one-anastomosis gastric bypass (OAGB) with primary modified fundoplication using the excluded stomach ("FundoRing") is unclear. We aimed to assess the impact of this operation in a randomized controlled trial (RCT) and answer the next questions: (1) What the impact of wrapping the fundus of the excluded part of the stomach in OAGB on protection in the experimental group against developing de novo reflux esophagitis? (2) If preoperative RE could be improved in the experimental group? (3) Can preoperative acid reflux as measured by PH impedance, be treated by the addition of the "FundoRing"?

METHODS

The study design was a single-center prospective, interventional, open-label (no masking) RCT (FundoRing Trial) with 1-year follow-up. Endpoints were body mass index (BMI, kg/m2) and acid and bile RE assessed endoscopically by Los Angeles (LA) classification and 24-h pH impedance monitoring. Complications were graded by Clavien-Dindo classification (CDC).

RESULTS

One hundred patients (n = 50 FundoRingOAGB (f-OAGB) vs n = 50 standard OAGB (s-OAGB)) with complete follow-up data were included in the study. During OAGB procedures, patients with hiatal hernia underwent cruroplasty (29/50 f-OAGB; 24/50 s-OAGB). There were no leaks, bleeding, or deaths in either group. At 1 year, BMI in the f-OAGB group was 25.3 ± 2.77 (19-30) vs 26.48 ± 2.8 (21-34) s-OAGB group (p = 0.03). In f-OAGB vs s-OAGB groups, respectively, acid RE was seen in 1 vs 12 patients (p = 0.001) and bile RE in 0 vs 4 patients (p < 0.05).

CONCLUSION

Routine use of a modified fundoplication of the OAGB-excluded stomach to treat patients with obesity decreased acid and prevented bile reflux esophagitis significantly more effectively than standard OAGB at 1 year in a randomized controlled trial.

TRIAL REGISTRATION

ClinicalTrials.gov Identifier: NCT04834635.

One anastomosis gastric bypass with fundoplication of remnant stomach for weight regain prevention: Case report

INTRODUCTION

Weight regain is a serious issue after bariatric surgery. Using banding for one anastomotic gastric bypass prevents weight regain, but carries the risk of band erosion. The combination of bariatric procedures and fundoplication for patients without hiatal hernia probably prevents weight regain. However, no studies are demonstrating this.

PRESENTATION OF CASE

A 38-year-old woman who underwent laparoscopic one anastomosis gastric bypass with fundoplication of remnant stomach maintained a stable body weight after 5 years.

DISCUSSION

Owing to the complications associated with the conventional methods, the combination treatment has several advantages such as prevention leak of suture line in the gastric pouch prevention.

CONCLUSION

The combination treatment could successfully prevent weight regain and thus, will be helpful in the better management of obesity.