Laparoscopic One Anastomosis Gastric Bypass (OAGB)

Also known as mini-gastric bypass or single anastomosis gastric bypass. Combines restriction and malabsorption with one connection for effective weight loss and metabolic improvement.

Single anastomosisFaster than Roux-en-YStrong weight lossMetabolic benefits

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Laparoscopic One Anastomosis Gastric Bypass (OAGB) at Metabariatrics Mumbai

Benefits

Why choose Laparoscopic One Anastomosis Gastric Bypass (OAGB)

Why patients and doctors choose this approach for weight loss and metabolic health.

Simpler technique

One connection (anastomosis) between stomach pouch and intestine; often shorter operating time.

Effective weight loss

Comparable to Roux-en-Y in many studies with strong metabolic improvement.

Larger pouch than RYGB

Pouch size closer to sleeve; some find eating patterns more manageable.

Diabetes improvement

Frequently leads to significant improvement or remission of type 2 diabetes.

Benefits of Laparoscopic One Anastomosis Gastric Bypass (OAGB) in Mumbai

The Process

From consultation to recovery

What to expect at each stage of your journey.

Consultation

Assessment of BMI, comorbidities and goals; discussion of OAGB vs other procedures.

Pre-operative preparation

Routine tests and any pre-op diet or medical optimisation.

Surgery

Creation of a tubular gastric pouch and a single loop connection to the small intestine.

Follow-up

Phased diet, vitamins (especially fat-soluble and B12) and regular check-ups.

Eligibility

Who is a good candidate?

This procedure may be right for you if the following apply.

BMI ≥ 35 with or without weight-related conditions
Suitable when Roux-en-Y is not preferred or when single-anastomosis approach is indicated
Aware of possible bile reflux; evaluation for GERD and Barrett’s as needed

About

About this procedure

One Anastomosis Gastric Bypass (OAGB), also known as mini-gastric bypass or single anastomosis gastric bypass, is a type of weight-loss surgery that combines restrictive and malabsorptive elements. It differs from conventional Roux-en-Y gastric bypass by having a larger gastric pouch (about 200 ml), similar in concept to the sleeve, and a single loop connection between the small intestine (jejunum) and the pouch. It is more malabsorptive than restrictive and can deliver strong weight loss and type 2 diabetes improvement.

OAGB is performed laparoscopically (and in some centres robotically). It is important to be under the care of a bariatric team experienced in this procedure and in managing possible bile reflux. Long-term vitamin and mineral supplementation and follow-up are required, as with other bypass procedures. At Metabariatrics we offer OAGB as part of our full range of bariatric and metabolic surgery options in Mumbai and Navi Mumbai.

Recovery

Recovery after OAGB / mini gastric bypass

1Hospital stay usually 1–2 days.

2Light activities often resumed within 1–2 weeks.

3Liquid then soft diet; gradual transition to solids.

4Lifelong multivitamin and monitoring of vitamins and minerals.

Recovery after Laparoscopic One Anastomosis Gastric Bypass (OAGB) at Metabariatrics Mumbai

Take the First Step

Discuss your options with Dr. Sharad Sharma

Book a consultation to find out if this procedure is right for you. Available in Mumbai and Navi Mumbai.

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Frequently asked questions

Find answers to common questions about this procedure.

OAGB may be suitable for patients with a high BMI (typically over 35) and weight-related health issues. It can be an option for those who have not responded well to diet and exercise or who prefer a single-anastomosis bypass. Evaluation for reflux and Barrett's is important.

OAGB offers significant weight loss and improvement in type 2 diabetes with one connection (anastomosis), often meaning shorter operating time and a technically simpler procedure than Roux-en-Y. The larger pouch can make eating patterns more manageable for some patients.

As with any surgery, OAGB carries risks like infection, bleeding, and nutritional deficiencies. Bile reflux and heartburn are possible; your surgeon will discuss monitoring and management.

You will follow a phased diet for healing and adaptation. Lifelong multivitamins and monitoring of vitamins (especially fat-soluble and B12) are required. Regular follow-up with your bariatric team is essential.

OAGB has one connection between the stomach pouch and small intestine and a larger pouch; Roux-en-Y has two connections and a smaller pouch. Both can achieve strong weight loss and metabolic improvement. Your surgeon will recommend based on your anatomy and goals.

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