# Mini Gastric Bypass

> Citation bundle for Mini Gastric Bypass on The Treatment Registry.
> URL: https://thetreatmentregistry.com/procedures/mini-gastric-bypass
> Bundle URL: https://thetreatmentregistry.com/api/citations/procedures/mini-gastric-bypass

- Category: weight-loss

## Description

Gastric bypass surgery refers to a technique in which the stomach is divided into a small upper pouch and a much larger lower "remnant" pouch, where the small intestine is rearranged to connect to both. Surgeons have developed several different ways to reconnect the intestine, thus leading to several different gastric bypass procedures (GBP).

## Overview

Gastric bypass surgery refers to a technique in which the stomach is divided into a small upper pouch and a much larger lower "remnant" pouch, where the small intestine is rearranged to connect to both. Surgeons have developed several different ways to reconnect the intestine, thus leading to several different gastric bypass procedures (GBP). Any GBP leads to a marked reduction in the functional volume of the stomach, accompanied by an altered physiological and physical response to food.

*Reference text adapted from Wikipedia under CC BY-SA 4.0. Verify with a qualified clinician before treatment.*

## Peer-reviewed outcome rates

- **Mortality rate:** 0.72% (range 0.53–0.90%) — from 2 cited sources

## Alternative treatments

- **Roux-en-Y gastric bypass** — Classical two-anastomosis bypass; better-studied long-term outcomes.
- **Gastric sleeve** — Simpler restrictive-only procedure; comparable initial weight loss.

## Sources

- [One Anastomosis (Mini) Gastric Bypass Is Now an Established Bariatric Procedure: a Systematic Review of 12,807 Patients.](https://doi.org/10.1007/s11695-018-3382-x) — Obesity surgery (accessed 2026-07-13)
- [[Evidence of the Mini-/One-anastomosis-gastric-Bypass for being a standard procedure in obesity and metabolic surgery].](https://doi.org/10.1007/s00104-018-0663-9) — Der Chirurg; Zeitschrift fur alle Gebiete der operativen Medizen (accessed 2026-07-13)
- [ASMBS — Clinical Practice Guidelines for Metabolic and Bariatric Surgery](https://asmbs.org/resources/clinical-practice-guidelines) — American Society for Metabolic and Bariatric Surgery (accessed 2026-06-29)