Gastric sleeve

What is a gastric sleeve?

With a gastric sleeve the surgeon removes a large part of your stomach. This he does in the length, so from top to bottom. The stomach is reduced by removing the outer bend of the stomach, leaving a small tubular stomach. Also, called banana-shaped. Approximately 65 to 80% of the stomach is removed.

The entrance and exit of the stomach remain the same. Your digestive tract remains the same. However, your stomach is a lot smaller. The part that is no longer used is removed from the body. Because the stomach has become much smaller, it is no longer possible to eat large quantities. It has also been shown that by removing a large part of the stomach, changes occur in certain hormones. The appetite hormone appears to be less produced, so you will be full faster. That’s why you fall off.

Praktijk Gabriels acts as a mediator. Registration and follow-up appointments are offered in Barendrecht (NL). Our patients are treated under the responsibility of and in a bariatric center in Belgium.

How does a gastric sleeve surgery work?

An infusion is brought into the preparation room of the clinic. The anesthetist can administer medication via this infusion. The operation takes place under complete anesthesia. This means that the whole body is numb, so that you will not notice anything of the procedure.

Once arrived at the operating room, control equipment will be installed, such as a blood pressure monitor and stickers for the heart registration. Also, oxygen is administered through a cap and the anesthetic is administered via an infusion. Only after you are completely asleep, the operation is started.

A total of four cuts are made after the abdomen is inflated with carbon dioxide. The camera shows everything well. Hereafter the surgical instruments are inserted. A stomach is laid in the stomach that the stomach is examined. The stomach is closed with staples. The stomach is removed via one of the left cuts, making this place more painful after the operation.

You will not remember the operation after the operation. You go to sleep and wake up when the gastric sleeve is complete. You will stay overnight in the clinic after the procedure before you can go home.

When am I suitable for a gastric sleeve?

A gastric sleeve is a good alternative to the gastric bypass. The weight loss is comparable. The gastric sleeve can be chosen on the basis of eating behavior or on the patient’s own preference. But it can also be chosen if a gastric bypass is not safe due to, for example, the length of the intestine or previous stomach operations. At Praktijk Gabriels you are eligible for a gastric sleeve from a BMI of 29.


Bariatrics is a collective term for all surgeries for countering excess weight. Think of a gastric balloon, a gastric band, a gastric sleeve and a gastric bypass.

We understand very well that it is a big step to make a first appointment for a bariatric procedure. That is why you can expect us to fully support you in this, if you want to. We advise you to bring your partner or good knowledge to the first consultation.

During the first consultation, we discuss all topics related to the treatments. This is how we approach the conversation about what is most disturbing to your body and what you would like to change about it. The methods and operation techniques will also be discussed and researched which suits you best, what results you can expect, what the possible risks of this surgery are and how the aftercare will look like. You will always receive honest advice and will be informed in a clear way about the treatment and the period that follows.

During the first consultation, the consultant also checks whether you are a suitable candidate for the bariatric procedure of your choice. The surgeon will ask about your health, medical background and any medication. If you use blood-thinning medication, you must stop at least one week before treatment.

After this initial consultation, you can make the right choice. We understand that during the first consultation a lot of information comes to you. Do not hesitate to contact us after this appointment.

What are the advantages and disadvantages of a gastric sleeve?

There are advantages and disadvantages and any risks for every operation. For example, after the operation, you can only use liquid food for the first week. If you tolerate this well you may start eating solid food again. An advantage of the gastric sleeve, compared with the gastric bypass, is that you will not experience any dumping complaints during this procedure.


  • No diet: never eat too much again

  • You are not hungry

  • This surgery has a beneficial effect on diabetes mellitus type 2

  • A gastric bypass is performed via a viewing operation

  • The scars are small, allowing you to recover quickly


  • Vomiting / nausea

  • You must take extra vitamins

  • Seam leakage / peritonitis

  • You may suffer from stomach acid.

What can I expect after a gastric sleeve?

A gastric bypass has a big impact on your life. You have to eat differently and more consciously because your body can process and absorb less food. For example, you have to take extra vitamins every day after the stomach reduction. After the operation, you must eat liquid or ground food for three weeks, so that the stitches in the stomach can heal well.

It is also important that you adjust your lifestyle. Only because of this will you permanently lose weight. Because of this weight loss you have fewer health problems. These can even disappear. Your quality of life will also greatly improve.

After the procedure, you can walk straight away and return home after an average of two days. A day after returning home you will be called by us to make an appointment for the first check. Furthermore, the dietary agreements must be clear, if that is not the case then we will gladly help you further. We are available by phone every day.


Two weeks after the procedure you have a check-up with the bariatric nurse.

After three months, six months, nine months and a year, you have re-checked the bariatric nurse in the practice of Diana Gabriels. It will always be examined which adaptation is needed.

If necessary, extra agreements are made with specific problems. After six months, we advise to prick blood at the GP. This to control the vitamins. This is then repeated at least once a year to check the nutritional and vitamin levels in the blood. If necessary, shortages will be started with additional medication.

From the first year after the operation, an inspection will take place twice a year for five years.

Physical activity

During the first two weeks, you should be more relaxed for a good wound healing. After these two weeks, if the wounds have recovered properly, you can do everything again.

It is then already important to get enough physical activity. This has a positive influence on the end result. By burning more calories, you lose more weight and stimulate the muscles. See which activities suit you and do what you like. Moving together often works motivating.

In any case, ensure that you get physical exercise for at least half an hour every day, such as swimming, walking, jogging and fitness. Even small changes make a lot of difference. Take for example the stairs instead of the elevator and walk (if possible) to appointments and shops. You can also park the car just a little further away.

Sports and exercise will ultimately have to become a logical and permanent part of your new way of life. That is healthier and it helps to keep your new weight stable. You get this better and easier for each other under supervision, by a movement therapist or in a group.

  • Regardless of the treatment (*), it is possible to lose up to 100% of your excess weight after the Band, Sleeve and Bypass, if BMI <40. The target weight is then BMI 23-25. If BMI ≥40 is statistically lost 70% of the excess weight.

    (*) the right treatment for the right person