Gastric Bypass
Gastric Bypass
Gastric Bypass

Gastric Bypass

Nikan Hospital

Nikan specialty and subspecialty hospital, constructed in 2010, is located in an area which is about 35000 square meters in the northeast of Tehran, Iran. This 102-bed hospital was opened in 2011 and has sixteen floors. All the members, including well-known knowledgeable professors, experts, and committed staff have gathered together to provide patients with services in a hospital which benefits from the most advanced science and medical standard devices. It includes many sections such as ICU-CCU's special department, maternity wards, and modern operating rooms. It’s important to note that in 2014, Nikan got the first place in Accreditation and Patient safety. Moreover, this center is known as the first Iranian private hospital to get the Green Award international certification in Berlin.


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Open 24 Hours
Private Nursing
Wheelchair Accessibility

How this Procedure is Done

What is Gastric Bypass?

Gastric bypass is a kind of weight loss surgery. During this operation, your specialist makes changes to your stomach and small intestine to modify the way they absorb and digest food. In addition, the surgeon will re-route or bypass part of your digestive system so you won’t absorb as much food. Gastric bypass will help you lose weight by limiting the amount of food that your stomach holds and the amount of calories and nutrients your body absorbs. It also changes your gut hormones, which help you feel full for a longer period of time because of appetite suppression.



Who Can Benefit from Gastric Bypass?

Gastric bypass and other types of weight-loss surgeries can be effective solutions for you if your body mass index (BMI) is 40 or higher (extreme obesity). However, if your BMI is 35 to 39.9 (obesity) and you struggle with serious weight-related health issues such as type 2 diabetes or high blood pressure, you can still think of this operation as an option since it can help you get rid of all these problems as well. 

On the other hand, gastric bypass isn't recommended at all to individuals who are extremely overweight. They need to consult with an experienced specialist to ask for a satisfactory solution to tackle their problems. They also need to make permanent changes in their lifestyle, monitor their nutrition, and ask a knowledgeable doctor to evaluate their medical conditions.



Gastric bypass typically takes a few hours. The details of your operation highly depend on your individual situation and your doctor's viewpoint. While some surgeries are performed with traditional open incisions in your abdomen, most of them involve inserting instruments through multiple small incisions in the abdomen.

After making the incisions with the open or laparoscopic technique, the surgeon cuts across the top of your stomach, sealing it off from the rest of your stomach. The resulting pouch is about the size of a walnut and can hold only about an ounce of food. Next, the specialist cuts the small intestine and sews part of it directly onto the pouch. The procedure is done by connecting the top portion of the divided small intestine to the small intestine further down. Because of these procedures, food will have to go into the small pouch of stomach and then directly into the small intestine sewn to it. The stomach acids and digestive enzymes from the bypassed stomach and first portion of small intestine will finally mix with the food.

This operation works through several mechanisms. First, the new stomach pouch is considerably smaller and digests less food. There is also a segment of small intestine that normally absorbs calories as well as nutrients. It will make less absorption of calories and nutrients more probable. The last point to indicate is that the rerouting of the food stream changes the gut hormones that promote satiety, suppress appetite, and reverse one of the major mechanisms by which obesity causes type 2 diabetes.



You will usually have to stay in hospital for one to four days after the operation. On the same day, you will be asked to walk a little. You won’t be able to eat for the first one to three days. Then, drinking liquids and eating soft foods will be permitted. Meanwhile, you can take pills to relieve pain if prescribed by your surgeon. When you can easily move around without a lot of pain, you will be able to go home. It’s better to ask someone to take care of you since you should rest for a while. At first, you may have some limitation on what you can eat and drink. Your doctor will recommend taking nutritional supplements, vitamin, and mineral supplements after surgery such as a multivitamin with iron, calcium, and vitamin B-12. Most patients are able to go back to work in one or two weeks. For the first month, you will only be able to eat small amounts of soft food and liquids. Gradually, you can add solid foods back into your diet. During this period, you will feel full very quickly after eating about two tablespoons of food. In the first several months, you should have medical checkups frequently to evaluate your overall situation. 

You don’t need to worry if your skin becomes dry or your mood changes. These are totally natural since your body reacts to the rapid weight loss in the first three to six months after the surgery. You can avoid such complications with proper care.


The Results

Within the first two years, you can expect to lose one-half to two-thirds of your extra bodyweight depending on your type of operation and changes in your lifestyle. Nevertheless, weight loss will decrease as time passes. By having a well-balanced diet and exercising on a regular basis, you will lose more weight. Fortunately, gastric bypass can provide long-term weight loss, enhances your ability to do routine daily activities, resolves all obesity-related problems, and finally improves your quality of life.


Generally yes. You need to talk to your doctor in advance about all the surgeries you have had. In this case, the best option will be determined to help you obtain our favorable results.

Yes. But you need to consult with your cardiologist to make sure you are making a right decision. In general, bariatric surgery can improve most problems related to heart disease like high blood pressure, heart enlargement, etc.

Most women become much more fertile after the operation. It’s important to note that controlling pills are not very reliable during the time your weight is changing. For this reason, you are recommended to adopt other techniques if you want to avoid pregnancy. Most specialists believe that it’s better to wait 12-18 months after surgery before getting pregnant. The good news is that after the operation, there is much less risk of dealing with problems caused because of pregnancy and childbirth. Furthermore, kids born after the surgery are less at risk of being affected by obesity later. The reason is the activation of certain genes during fetal growth.

Yes. Some hair loss is usual between three and six months following operation. Nonetheless, this is almost always temporary and can be controlled by using vitamins and minerals prescribed by your specialist.

Yes. Most surgeons talk to their patients about a special diet they should have for about 2 or 3 weeks before the operation. The reasons are shrinking the liver and reducing fat in the abdomen.
Six to eighteen months after the surgery, most patients get some form of appetite back. However, they cannot eat whatever and whenever they want. Eating healthy nutritious foods is important for achieving the desired results. Moreover, they don’t need to do strenuous activities; exercising on a regular basis can help them maintain a stable weight and enjoy the results for a longer period of time.

As you lose weight, you may be permitted to stop some medications you take for high blood pressure, heart disease, etc. Undoubtedly, you should talk to your doctor about all these issues beforehand.

You should eat at least 600 per day even if you have no appetite in the early days. This number may seem terribly low to you now, but you will get used to it after a while.

This surgery can easily change your food capacity only if you stick to the new habits recommended by your surgeon. This surgery alone does not fix your problems. You must live a healthy lifestyle, have a well-balanced diet, and exercise regularly to maintain your health for a long time.

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