Prof. Mehmet Tahir ORUÇ, M.D.

  • Obesity and Metabolic Surgery • Cancer Surgery

Prof. Mehmet Tahir ORUÇ, M.D.

Obesity and Metabolic Surgery / Antalya

Prof. Mehmet Tahir ORUÇ, M.D.

Phone: +90 555 192 07 32


Prof. Mehmet Tahir ORUÇ, M.D.

He graduated from Ankara University Medical School, from 1983 to 1989 and became “Medical Doctor” in 1989.

He became a General Surgery Specialist after general surgery specialty training at Ankara Numune Training and Research Hospital in between 1990-1994. After residency, he worked as fellow dealing with surgical oncology at Ankara Oncology Training and Research Hospital for 3 years. He was awarded the title “Associate Professor and Deputy Chief of Clinic” in 2005, “Chief of General Surgery” in 2009 and “Professor of General Surgery” at School of Medicine, Istinye University, in 2019. He was the Chief of General Surgery at Antalya Training and Research Hospital from 2012 to 2019. Prof. Mehmet Tahir Oruç, is still working at Antalya Medical Park Hospital and deals with Obesity-Metabolic Surgery, Cancer Surgery, Advanced Laparoscopic Surgery (Laparoscopic Obesity and Metabolic Surgery, Reflux Surgery, Colon, Rectum Surgery etc.) and General Surgery. As obesity and metabolic surgery procedures, he successfully performs numerous sleeve gastrectomy surgeries, metabolic surgeries (minigastric bypass, transit bipartition, Roux-n-N-Y Gastric Bypass) and revision surgeries. Also, he carries out all surgeries and reconstructions regarding breast cancer, and surgeries regarding gastrointestinal cancers, like stomach, colon-rectum cancers, pancreas cancers, with great experience and success. Prof. Mehmet Tahir Oruç, M.D. worked as fellow at the Department of Hepatobiliary and Liver Surgery, Presbyterian University Hospital and University of Pittsburgh, the U.S.A., for 6 months in 2002. He received training on Gastric Band Application in Morbid Obesity in Austria in 2005. He had training on Laparoscopic Lower Gastrointestinal Surgery (closed colon and rectum surgeries) at Cushieri Skill Center, which is a globally known reputable Center, in Dundee/Scotland in 2010. He received Robotic Surgery Training at Acıbadem University in 2015. Moreover, he made presentations in many international scientific meetings. Prof. Mehmet Tahir Oruç, M.D. also made contributions to Medical Literature many times; he has approximately 290 papers published in local and international meetings.

He was participant, lecturer and moderator in various local and international scientific meetings and courses. His scientific studies were cited more than 500 times in various local and international journals and boks and they were referred. Prof. Oruç is still working at Antalya Medical Park Hospital.


What is Obesity? Unhealthy fat deposition in the body refers to obesity and people having an excess amount of body fat are called as obese. To evaluate obesity, a special formula, namely body mass index (BMI), is applied which combines a person’s weight with their height. How body mass index is calculated? Body weight (kg) / Height (in meter) * Height (in meter) For instance; a person who weighs 135 kilograms and is 1.80 metres tall has a BMI equal to 135 / 1.80*1.80 = 135/3.24= 41.66.

Why Obesity or Being Overweight Occurs? Eating too much food and high-calorie foods rich in fat cause obesity. Life style: Sedentary lifestyle and physical inactivity trigger obesity. Why is Surgery Required For Obesity ? As obesity progresses, it triggers many diseases. In most of patients with obesity, hypertension, type 2 diabetes, high blood lipids, short-lasting pause of breathe in sleep (sleep apnea), joint injury and depression are observed. Obesity plays a major role in increasing the risk of cardiovascular diseases, colon, uterine and breast cancers. The most important factor is surgery to achieve permanent weight loss, eliminate the risks caused by obesity and manage obesity-related diseases. What Kind of a Hospital Should be Preferred for Surgery? Obesity is a disease that affect all organs and systems. A hospital that performs obesity treatment should have physicians of all medical departments and operating rooms and intensive care units that enable any and all interventions along with advanced technical equipment. For obesity surgery, detailed preoperative preparations are necessary and perfect organization is required during surgery period. It is necesseary to carry out treatment together with a team from all relevant branches consisting of surgeon, internist, endocrinologist, psychiatrist, dietitian, obesity nurse and obesity assistant. The team should be accessible round the clock via single phone line. What are preoperative preparations?

– It is necessary that the patient has history of non-surgical obesity treatment, resulting in failure.

– It should be verified that weight gain is not caused by a hormonal disease.

– Sufficient information regarding types of obesity surgeries, expected outcomes, side effects and complications should be obtained.

– It is necessary to know that appetite will be smaller, eating will take more time and slow down and feeling of fullness will increase and patients should mentally prepare for this change.

– Patients should quit smoking weeks before the surgery. – Patients should be followed-up by dietitian after surgery is decided.

– Detailed examination and consultations are made before obesity surgery. What is Sleeve Gastrectomy and how it induces weight loss? It is a surgery that is performed by removing a major part of the stomach with laparoscopic method (closed) using thin long surgical tools.

The curved part of the stomach secreting hunger hormone is excised. In postoperative period, hunger hormone falls significantly and appetite decreases. How is Sleeve Gastrectomy Performed? It is performed with laparoscopic (closed) technique under general anesthesia. In the procedure, four to five small incisions, each measuring 1 to 2 cm in length, are made on abdominal wall. Camera and surgical tools are used. How about the postoperative period? Recovery period is quick in postoperative period. Complaints like pain and nausea are mild and they disappear within hours.

Liquid foods are consumed in the first Phase(15 days) after discharge.Mashed soft foods are consumed in the second phase (Day 16-Day 30) What are Risks of the Surgery? Sleeve Gastrectomy poses moderate risk. Undesired, negative outcomes are pretty low. Advanced age, sedentary life and smoking increase general risks. The risks of the surgery are lower than the risks of living with obesity. How about weight loss period? In postoperative period, most of the patients lose weight smoothly. Patients lose about 70% of excessive weight within 1.5 years. Typically, weight is stable after 2 years.

Patients who undergo sleeve gastrectomy feel relieved and become mobilized in early postoperative course. Health problems, secondary to obesity, heal within months. Habit of healthy eating is gained in postoperative period. Feeling of hunger decreases significantly and the duration of eating is reduced. Most of expected outcomes are achieved within 1 year and it is possible to live a comfortable life. WHAT IS METABOLIC SURGERY? The important point of metabolic surgeries is to eliminate a portion of intestines with by-pass. Metabolic surgeries can also be performed for patients with Type 2 diabetes having no severe weight problem. How is metabolic surgery performed? The operation is carried out with laparoscopic method (closed). 5 holes (1 cm) are punched on abdominal region and the small intestine and the stomach are transposed. What is Diabetes? Diabetes is a disease that is caused by insufficient or ineffective insulin production by the pancreas.

Blood glucose levels are regulated by insulin hormone. If insulin hormone is insufficient or ineffective, blood glucose level elevates. What are the types of Diabetes? There are two types of diabetes: type I and type II. Patient’s body does not produce insulin in Type 1 diabetes. In type 2 diabetes, the body can still make insulin, but does not use insulin properly. Who is a candidate for metabolic surgery? It is performed for patients with Type 2 diabetes. The objective of the operation is to enable patient’s body to use insulin sufficiently and effectively. With this operation,

it is considered that healthy function of pancreas is maintained. No intervention is made for pancreas. What are Postoperative Considerations? The first 3-4 weeks after the operation is adaptation period. In this period, the body tries to get used to a new metabolism. Fluctuations occur in blood glucose and blood pressure levels. Patients may feel fatigue and appetite may decrease in this period. Diabetes takes different course from person to person. Does diabetes disappear completely in patients who undergo metabolic surgery? Patients who undergo this operation can recover from type 2 diabetes without taking insulin or oral anti-diabetic agent, and blood glucose is regulated considerably.

Similar to all surgical procedures, the outcome of this surgery varies not depending on physician’s applications, but on patient’s psychological state, believing in recovery, stress, family and social support and professional and social life.


Prof. Dr. M. Tahir ORUÇ meme kanseri, obezite ameliyatı, tüp mide, mide küçültme, şeker ameliyatı, tiroid nodülü, mide by-pass, rektum kanseri, kolon kanseri, reflü, tiroid kanseri, gastrik by-pass konularında Antalya'da genel cerrah olarak çalışmaktadır.

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Tel: 0 555 192 07 32Antalya Medical Park Hastanesi
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