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Baros Surgery

Procedure Overview

  • Procedure Type: Restrictive + Malabsorptive
  • Surgery Duration: 1–2 Hours
  • Recovery Time: 2–3 Weeks
  • Approach: Laparoscopic
One Anastomosis Gastric Bypass

Maximum Weight Loss, Reversible Procedure

One Anastomosis Gastric Bypass creates a long, narrow stomach pouch and connects it directly to the small intestine, bypassing 180–250 cm of bowel. This dual mechanism of restriction and malabsorption delivers among the highest weight loss outcomes of any bariatric procedure — 80–90% excess weight loss.

A key advantage of OAGB is its reversibility. Unlike VSG, which permanently removes stomach tissue, OAGB can be reversed or revised if needed. It also involves a single surgical connection (anastomosis), making it technically simpler and quicker than RYGB with fewer potential complications and side effects.

At Baros Apollo, OAGB is recommended for patients with higher BMI who need aggressive weight loss along with resolution of metabolic conditions like diabetes, hypertension, high cholesterol, and obstructive sleep apnea. Long-term nutritional monitoring and supplementation are essential following this procedure.

01. Who It's For

OAGB is ideal for patients with morbid obesity who require a high-impact, reversible surgical option and are committed to lifelong follow-up and nutritional supplementation.

  • BMI greater than 37.5 or above 32.5 with co-morbidities
  • Patients with morbid obesity and metabolic complications
  • Volume eaters seeking maximum weight loss results
  • Patients who prefer a reversible bariatric option

02. How It Works

OAGB uses a simplified single-connection technique that combines the best of restrictive and malabsorptive approaches for powerful and sustained results.

Narrow Pouch Creation

A long, narrow gastric pouch is formed, substantially restricting food capacity.

Bowel Bypass

180–250 cm of small intestine is bypassed, reducing calorie and nutrient absorption.

Single Anastomosis

Only one surgical connection is made, reducing operative time and complication risk.

Reversible Design

The procedure can be reversed or revised if clinically needed in the future.

03. Expected Outcomes

OAGB delivers the highest excess weight loss percentages among standard bariatric procedures. Patients at Baros Apollo typically achieve:

  • 80–90% excess weight loss within the first year
  • Significant improvement in diabetes and blood pressure
  • Resolution of cholesterol issues and sleep apnea
  • Fewer side effects compared to traditional RYGB

India’s leading bariatric & metabolic surgery centre at Apollo Hospitals, Chennai. Expert surgical care, proven outcomes, and lifelong support

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