What Is Gastric Bypass?

Gastric bypass, also known as Roux-en-Y gastric bypass (RYGB), is a surgical weight loss procedure that has both restrictive and malabsorptive components. It is one of the most commonly performed bariatric surgeries.

During gastric bypass surgery, various steps are followed to reduce the size of the stomach and make changes to the digestive system. Here’s a general description of these steps:

Stomach Partitioning: Before the surgery begins, the stomach is divided to create a smaller upper stomach (pouch) and a larger lower stomach (remnant). The upper stomach is reduced in size to make you feel fuller faster when eating.

Jejunum Routing: The upper stomach is connected to the beginning of the small intestine. This allows a portion of the food to bypass the smaller stomach and skip a part of the digestion process.

Jejunum Re-routing: The small intestine is connected to a portion that is separated from the remaining stomach. This prevents food from passing through a portion of the intestines and reaching further parts, thereby reducing the amount of food absorbed.

This procedure promotes weight loss through two mechanisms. Firstly, stomach partitioning and reduction contribute to weight loss by limiting the amount of food intake. Secondly, the re-routing of the small intestine and partial malabsorption prevent the body from fully digesting nutrients, resulting in the intake of fewer calories.

Although gastric bypass surgery is an effective option for combating obesity, it is a significant surgical procedure and carries certain risks and potential complications. Therefore, it is important to undergo a detailed evaluation with a healthcare professional before the surgery and have a thorough discussion about the benefits, risks, and expected outcomes of the procedure.

Gastric Bypass women

What Is The Complications in Gastric Bypass?

Gastric bypass surgery, also known as Roux-en-Y gastric bypass, is a type of bariatric surgery that involves creating a small stomach pouch and rerouting a portion of the small intestine. While gastric bypass surgery is generally considered safe and effective, there are potential complications that can occur. These may include:

Leakage: The most significant concern following gastric bypass surgery is the risk of leakage at the connection sites or staple lines. This can result in infection, abscess formation, or other complications. Surgeons take precautions to minimize the risk of leaks, such as reinforcing the connections and using surgical sealants.

Strictures: Narrowing or strictures can develop at the connection between the stomach pouch and the small intestine. This can cause difficulties in swallowing or the passage of food and may require endoscopic dilation or surgical intervention to address.


Dumping Syndrome: Dumping syndrome can occur after gastric bypass surgery, especially when high-sugar or high-fat foods are consumed. It involves rapid movement of undigested food from the stomach pouch to the small intestine, causing symptoms such as nausea, vomiting, diarrhea, dizziness, and sweating.

Nutritional Deficiencies: Gastric bypass surgery alters the normal digestion and absorption of nutrients, which can lead to deficiencies in vitamins (such as B12, D, and folate), minerals (such as iron and calcium), and protein. Lifelong supplementation and regular monitoring of nutritional levels are necessary to prevent deficiencies.

Gallstones: Rapid weight loss after gastric bypass surgery increases the risk of developing gallstones. The gallbladder may not empty properly due to changes in bile flow, leading to the formation of gallstones. In some cases, the gallbladder may need to be removed during or after the surgery.

Ulcers: Ulcers can develop in the stomach or at the connection between the stomach pouch and the small intestine. These ulcers may cause pain, bleeding, or perforation, and may require medical or surgical intervention.

Blood Clots: Bariatric surgery increases the risk of blood clots forming in the legs (deep vein thrombosis) or traveling to the lungs (pulmonary embolism). Precautions such as early mobilization, compression stockings, and blood-thinning medications are used to reduce this risk.

It’s important to note that these complications are possible but do not occur in every individual. The risk of complications can vary depending on factors such as the individual’s overall health, adherence to post-operative guidelines, and the surgeon’s experience and skill. Prior to undergoing gastric bypass surgery, thorough discussions with the healthcare team, including the surgeon and bariatric specialists, can help address concerns, outline potential risks, and provide guidance for a safe and successful surgical experience.

Apera Health Group

Apera Health Group is a renowned health tourism organization that specializes in bariatric surgery and has received accreditation from prominent healthcare institutions worldwide. With an impressive record of 50,000 satisfied patients, Apera Health Group operates numerous healthcare centers in Turkey and Europe.

Situated in the heart of Turkey, Apera Prime Hospital in Istanbul offers a comprehensive range of treatments and services. Apera ensure a seamless experience for Apera patients by providing transfers between the airport, hotel, and hospital using our luxurious VIP fleet. Apera transportation services comply with both local and international regulations, establishing a foundation of trust with Apera patients.


Namık Yılmaz Clinic Antalya

Namık Yılmaz Obesity Surgery is a renowned medical facility located in the beautiful city of Antalya, Turkey. The clinic offers world-class services to patients from all over the globe, boasting a team of experienced doctors who are proficient in foreign languages. Antalya, easily accessible through direct flights from various European and Asian countries, serves as an ideal location for the clinic.

Namık Yılmaz Obesity Surgery ensures a seamless experience for its patients by providing airport transfers, arranging accommodations, and delivering precise and successful treatment. The clinic’s dedicated guides are readily available to assist patients and their families, ensuring a healthy and pleasant journey back home.

Led by the esteemed medical professional, Surgeon Namık Yılmaz, the clinic specializes in Bariatric Surgery and has achieved significant success both in Turkey and Europe. Patients can expect a safe and comfortable treatment under the expert supervision of Surgeon Namık Yılmaz.


Doç Dr. Umut Rıza Gündüz

After completing a challenging educational process at Cerrahpaşa Medical Faculty and starting my General Surgery Assistantship at Okmeydanı Training and Research Hospital in 2005, I became a General Surgery Specialist in 2010. Throughout my assistantship in general surgery, I participated in numerous surgeries and performed a great number of operations. My interest and passion for laparoscopic surgery developed during my assistantship.

During my over 10-year tenure at Antalya Training and Research Hospital, I mainly focused on cancer and obesity surgeries. I aimed to perform more laparoscopic surgeries. Additionally, I received domestic and international training in obesity surgery, robotic surgery, and advanced endoscopic procedures. My fascination with technology increased my enjoyment of robotic surgery, laparoscopic surgery, and advanced endoscopic applications.

My curiosity about medical literature gradually led me from reading scientific articles to the stage of writing them. Together with my colleagues and fellow resident doctors, I have contributed to numerous medical articles. By writing and contributing to medical articles, I successfully passed the first stage of my Associate Professorship application and obtained the title of Associate Professor in November 2017.

As a clinical training instructor, I have performed numerous specialized surgeries and had the opportunity to contribute to the education of my fellow resident doctors. In August 2021, due to personal reasons, I had to leave Antalya Training and Research Hospital where I worked with pleasure. In the same year, I started working at Özel Termessos Hospital. While primarily focusing on obesity and metabolic surgeries, I also continue to perform oncological surgeries. Professionally, it makes me happy to enhance my interest in laparoscopic surgery in the field of obesity and metabolic surgery.

With the support of the management at Özel Termessos Hospital, we have made significant progress in health tourism within a year. I am grateful to the management of Özel Termessos Hospital and all its employees for this. As of September 2022, I was honored with a position on the Board of Directors and became a Manager at Özel Termessos Hospital where I have been working. Although I have moved to my private clinic, I continue to perform my surgeries at Özel Termessos Hospital.


Dr. Feridun Elmas

Dr. Feridun Elmas, born in Konya, is a highly experienced plastic, reconstructive, and aesthetic surgeon. He pursued his education at Istanbul Marmara University Faculty of Medicine after completing his primary education in Konya’s Ereğli district and high school education at Science High School. During his time at university, he had the opportunity to observe neurogenetic laboratory studies at Yale University School of Medicine, renowned as one of the world’s top universities. Dr. Elmas gained valuable experience by performing numerous surgeries while specializing in Plastic, Reconstructive, and Aesthetic Surgery at Ankara Dış Kapı Yıldırım Beyazıt Training and Research Hospital. He actively participated in various congresses, workshops, and conferences, presenting his work and publishing in national and international journals. Following the completion of his residency, Dr. Elmas fulfilled his state service obligation by working in Burdur, where he performed plastic surgery procedures on both domestic and international patients.

Dr. Feridun Elmas is a proud member of esteemed organizations such as ISAPS (The International Society of Plastic Surgery), Turkish Plastic Reconstructive and Aesthetic Surgery Association (TPRECD), and Aesthetic Plastic Surgery Association (EPCD). He currently welcomes patients at his private clinic in Antalya Konyaaltı, where he provides exceptional care and expertise in the field of plastic surgery.


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