Exploring gastric bypass surgery

Written by: Mr Naim Fakih Gomez
Edited by: Aoife Maguire

Gastric bypass surgery, also known as Roux-en-Y gastric bypass, is a surgical procedure designed to aid in weight loss for individuals struggling with severe obesity. It involves creating a smaller stomach pouch and rerouting the small intestine to limit the amount of food you can eat and the absorption of nutrients.


We speak to leading surgeon Mr Naim Fakih Gomez , who provides us with a clear understanding of gastric bypass surgery, including its benefits, risks, and considerations.



What happens during a gastric bypass?


In gastric bypass surgery, the surgeon creates a small pouch at the top of the stomach, which significantly reduces the amount of food you can consume at one time. This pouch is then connected directly to the middle portion of the small intestine, bypassing the rest of the stomach and the upper portion of the small intestine. By doing so, the body absorbs fewer calories and nutrients from the food you eat.


What are the benefits of a gastric bypass?


Gastric bypass surgery offers several potential benefits for individuals struggling with obesity. Firstly, it can lead to significant and sustained weight loss, which can improve overall health and reduce the risk of obesity-related conditions such as type 2 diabetes, hypertension, and sleep apnoea. Moreover, many patients experience improvements in mobility, energy levels, and quality of life following the procedure.


What risks are linked to the surgery?


While gastric bypass surgery can be highly effective, it is important to understand that it is not without risks. Like any surgical procedure, gastric bypass carries the risk of complications such as infection, blood clots, and leaks from the surgical site. Additionally, some patients may experience nutritional deficiencies due to decreased absorption of vitamins and minerals. It is crucial for patients considering gastric bypass to discuss these risks with their surgeon and carefully weigh the potential benefits against the risks.


Is gastric bypass right for you?


Gastric bypass surgery is not a decision to be taken lightly. It is typically recommended for individuals with a body mass index (BMI) of 40 or higher, or a BMI of 35 or higher with obesity-related health problems. However, each patient's situation is unique, and it is important to consult with a qualified healthcare provider to determine whether gastric bypass is the right option for you. Your surgeon will consider factors such as your overall health, previous weight loss efforts, and personal goals before recommending a course of action.



Gastric bypass surgery can be a life-changing procedure for individuals struggling with severe obesity. By reducing the size of the stomach and altering the digestive process, gastric bypass can help patients achieve significant and sustained weight loss, leading to improvements in overall health and quality of life. However, it is important to carefully consider the potential risks and benefits and consult with a qualified surgeon before undergoing this procedure.





If you are considering gastric bypass and would like to book a consultation with Mr Gomez, do not hesitate to do so by visiting his Top Doctors profile today.

By Mr Naim Fakih Gomez

Mr Naim Fakih Gomez is a respected surgeon based in London at The Chelsea Wing – Adults and Paediatrics at the Chelsea and Westminster Hospital. He specialises in weight loss (Bariatric) and upper gastrointestinal (GI) surgeries, as well as other general surgery conditions such as gallstones and hernias.
With his expertise, he focuses on various aspects of bariatric surgery, including revisional surgery for failed operations, managing complications after bariatric procedures, performing laparoscopic hernia operations, and gallbladder surgery.
His journey in the medical field began at the University of Navarra in Spain, where he pursued his primary degree in medicine and surgery. Following that, he embarked on a rigorous surgical training programme at the renowned "12 de Octubre" University Hospital (Hospital Universitario 12 de octubre) in Madrid.

In 2014 he made his way to London and had the privilege of joining the Imperial College Obesity Centre. During his time there, he underwent an intensive fellowship in bariatric, metabolic, and upper GI surgery. The experience he gained during this fellowship was invaluable, allowing him to refine his techniques and expand his knowledge in the field.

In 2017 he was appointed as a consultant at UCLH (University College London Hospitals), where he performed over 300 bariatric procedures. He built upon his passion for upper GI and bariatric surgery by joining the Upper GI & Bariatric Surgery team at Chelsea & Westminster Hospital in 2020, where he continues to provide comprehensive care to patients, employing the latest surgical techniques and staying updated with advancements in the field.

His commitment to his patients and the field of surgery drives him to continually expand his knowledge and skills. He is dedicated to providing personalised care and ensuring the best possible outcome for each individual that he treats.

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