Gastric Bypass

A gastric bypass is a type of weight loss surgery that alters the digestive system to help individuals lose weight. It involves creating a small pouch at the top of the stomach, which is then connected directly to the small intestine, bypassing a large portion of the stomach and the first part of the small intestine. This reduces the amount of food the stomach can hold and limits calorie and nutrient absorption, leading to weight loss.

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Who is gastric bypass recommended for?

BMI 35–40

with hypertension, sleep apnoea, or type 2 diabetes

GORD/GERD patients

often accompanying obesity

Significant weight loss

65–70% of excess body weight in 6–12 months

Note: Gastric bypass is actually recommended for patients with reflux, since it often improves or resolves GORD/GERD symptoms.

What does sleeve gastrectomy involve?

Stomach divided into two sections; a small pouch (~100 ml) is created
Pouch connected directly to the small intestine, bypassing the duodenum and part of the jejunum
Prevents large meals, reduces digestion and absorption time
Requires vitamins & minerals (B12, iron, calcium) to avoid deficiencies

2–3 hours

Operation time

Up to 5 days

Hospital stay

~65–70%

Excess-weight loss in 6–12 months

How to prepare for the procedure?

Complete blood count, blood group and Rh factor
Biochemical tests: sodium, potassium, glucose
ECG – heart function assessment
Gastroscopy – stomach lining check
Additional tests depending on medical history

What are the possible complications following the procedure?

Although gastric bypass is highly effective and widely performed, some complications may occur:

Gastric bleeding or leakage at the stomach–intestine connection
Nutrient deficiencies – vitamin B12, iron, calcium
Anaemia due to iron deficiency
Ulceration at the connection site
Bowel obstruction or twisting of intestines

Regular follow-up and adherence to supplements and dietary guidance minimise risks.

Your journey step by step

Consultation

eligibility assessment and planning

Pre-operative test

bloods, ECG, gastroscopy.

Surgery

gastric bypass (2–3 hours)

Hospital stay

recovery, mobilisation, and diet start (up to 3 days).

Follow-up care

staged diet over 4–6 weeks, with long-term specialist support.

Follow-up care

staged diet over 4–6 weeks, with long-term specialist support.

Benefits of gastric bypass

Gastric bypass offers several important advantages for patients:

65–70% excess body-weight loss within 6–12 months
Metabolic improvement – often remission of type 2 diabetes
Reduced reflux – significant relief or resolution of GORD/GERD
Effective intake control – limits absorption of carbs, fats, sugars
Improved quality of life with comprehensive support

What does post-operative care and recovery involve?

Recovery is structured to protect the new stomach pouch and bypass. Early mobilisation is encouraged to reduce risks. Patients follow a staged diet (starting with liquids) and must take prescribed supplements (B12, iron, calcium). Regular follow-ups are essential to monitor healing and nutrition.

Standard hospital stay: up to 5 days.

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Disclaimer
*The Pax Medicus website provides information for guidance only and does not constitute medical advice, diagnosis, or treatment. Pax Medicus does not provide healthcare services and is not a substitute for consultation with a qualified medical professional. Always seek advice from your physician regarding any medical condition. Prices shown are indicative only and subject to confirmation by the healthcare provider. This is the official website of Pax Medicus; we do not operate through agents or third-party sites.

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