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“Gastric Bypass VS sleeve Gastrectomy”

The difference between gastric sleeve surgery and gastric bypass:

In order to be able to choose between these two surgeries, it is necessary to know the differences between the two types of slimming surgeries and to be aware of the advantages and disadvantages of each.

As we know, both surgeries are performed laparoscopically

We must first examine the gastric bypass surgery and gastric sleeve surgery

Gastric bypass surgery

During this operation The surgeon changes and shortens the passage of food from the esophagus to the intestine. For this reason, this method is called bypass (shortcut). In fact, the surgeon works to reduce the volume of the stomach and the food eaten enters the intestine without taking up the entire volume of the stomach.

In fact, with the gastric bypass method, a large part of the stomach leaves the digestive tract and food passes through only a small part of the stomach.

This operation is only performed for people who:

  1. People whose body mass index is greater than or equal to 40 (or over 100 pounds overweight).
  2. People who have a body mass index greater than or equal to 35 but have at least two obesity-related diseases. These diabetes can include conditions such as type 2 diabetes, high blood pressure or heart disease.
  3. Those who can not reach a healthy weight with diet and exercise

Gastric sleeve surgery

What is done in the gastric sleeve is that about 80 to 90% of the incised stomach comes out of the body and the stomach becomes a tube. Food also passes through a tubular stomach. As a result, the capacity of the stomach is removed from the sac.

We want to examine gastric bypass and sleeve surgery from different aspects:


The rate of invasion

By comparison (between a sleeve and a bypass), gastric sleeve surgery is less invasive because only part of the stomach is removed and other tissues, such as the intestine, are not involved.


Surgery time

Gastric bypass surgery is a two-step procedure. In this operation, the stomach is divided into two parts, the intestine is cut in the initial part and several new connections are made, which increases the operation time and its complexity.

Gastric sleeve is one step and surgery and anesthesia is less than an hour

Also, the length of hospital stay, rest and recovery at home is shorter in sleeve surgery


Hunger rate

After gastric sleeve surgery, hunger is significantly reduced. because the lower and larger part of the stomach, which is actually the site of the production of hunger hormones (ghrelin), is completely removed. So much so that some patients some patients had to remind themselves to eat something. Weight loss after gastric bypass is done much faster. (Almost all of the patient’s extra weight is reduced in the first year after bypass.) But in gastric sleeve, the patient loses weight less slowly.

We need to know that slow weight loss is beneficial. Because slower weight loss leads to less sagging and cracking of the skin. In fact, the process of losing weight in the patient goes normally.



Gastric sleeve surgery is irreversible because during this operation, a large percentage of the stomach volume is completely removed and removed from the body.

But bypass can be reversed and the stomach and intestines returned to normal.


Food absorption rate

The ability to absorb nutrients remains after sleeve surgery

But in gastric bypass surgery, the loss of part of the small intestine makes it difficult to absorb nutrients, and the patient must take supplements after surgery.



Due to the complexity of the bypass procedure, it will cost more than the cost of gastric sleeve.


In general, gastric sleeve has several advantages over gastric bypass.

Decreased appetite, speed and ease of operation, no cracking or sagging of the skin after surgery, low surgical time, hospitalization, rest and recovery, low invasive surgery, relatively low cost

Disadvantages of this procedure include the fact that fewer studies have been performed on the outcome of gastric sleeve, but gastric bypass surgery has long been recognized as the standard weight loss solution.

However, it should be noted that despite the relatively high risk of bypass compared to gastric sleeve, it causes more weight loss.

Also, in case of gastric reflux in the patient, it is recommended to perform gastric bypass instead of gastric sleeve, because the possibility of gastric reflux after bypass is greatly reduced.

In both surgeries, there is a possibility of bleeding, infection, and blood clots or a leak in the staple line.