Healthy Living (Wellness & Prevention) Data Verified

Bariatric or Weight-Loss Surgery - Introduction, Types, and Complications

Published on Dec 03, 2019   -  7 min read


Bariatric or weight-loss surgeries are minimally invasive techniques that are done to achieve weight loss by reducing the size of your stomach. Read the article to know about the various types of weight-loss surgeries, its advantages and risks.

Bariatric or Weight-Loss Surgery - Introduction, Types, and Complications


Bariatric surgery are procedures done to reduce food intake in obese individuals, in order for them to lose weight. Body mass index (BMI) is used to determine if a person is obese or not. If a person’s BMI is over 30, he or she is classed as obese.

The common types of bariatric surgery are

The most commonly used procedure amongst these is the gastric bypass. Here, the digestive system past the stomach is re-routed to suppress hunger and make the individual feel full. During the gastric band procedure, an inflatable band is placed around the upper portion of the stomach, which makes the stomach smaller. So people after getting this done feel full after eating less food. In sleeve gastrectomy, 80 % of the stomach is removed. This limits the food a person can eat at a time.

The recovery time varies depending on the patients, but it usually takes months to resume normal daily activities after the surgery. Most patients have to follow a liquid diet, after which they introduce solid food gradually. This surgery not only helps a person lose weight but also lowers the risk of heart problems, diabetes, stroke, etc., associated with obesity.

How Does Bariatric Surgery Help in Weight Loss?

Bariatric surgery helps in weight loss in the following two ways:

What Are the Common Types of Bariatric Surgery Performed?

The common types of bariatric or weight loss surgery performed are:


It is otherwise called gastric bypass, and it is the most common type of surgery done to achieve weight loss.


Here, a small stomach pouch of around 30 ml is created by separating the top portion of the stomach from the rest, and the upper portion of the small intestine is also divided. After dividing the stomach and small intestine, the small stomach pouch is connected to the lower divided end of the small intestine. In the end, the top portion of the small intestine is connected further down to the lower end of the small intestine, which allows the stomach acids and digestive enzymes to mix with the passing food.

The small stomach pouch that is created holds less food, and as a part of the small intestine is bypassed, fewer nutrients and calories get absorbed by the body. The surgery also changes the hormones in the gut, which promotes satiety, suppresses hunger, and reduces the risk of type 2 diabetes.

Roux-En-Y Gastric Bypass

img-source :




It is otherwise called laparoscopic sleeve gastrectomy. In this procedure, around 80

% of the stomach is removed.


As almost 80 % of the stomach is removed, the remaining portion of the stomach is small, tubular and looks like a banana. It almost works similar to gastric bypass. The new and small stomach holds only very little food, so the patient eats less. Similar to gastric bypass, this also affects the gut hormone, resulting in satiety, blood sugar control, and less hunger.

This procedure also helps type 2 diabetes patients manage blood glucose levels independent of weight loss.

Sleeve Gastrectomy

img-source : mainehealth




This procedure is otherwise called the band. Here, an inflatable band is placed around the upper portion of the stomach, which creates and separates a small portion of the stomach above the band from the rest of the stomach.


The distance between the band and stomach opening can be adjusted, which will determine the size of the stomach pouch. The smaller the distance, the lesser will be the food intake. If the stomach pouch is small, then eating a small amount of food will make the person feel full. This size of the stomach opening can be easily adjusted by injecting sterile saline.

The size of the stomach opening is adjusted slowly over time. In this procedure, normal digestion and absorption is not affected. It does not alter the gut hormones, thus it is not useful in controlling blood sugar levels. It only reduces the amount of food a person can consume at a time.

Adjustable Gastric Band

img-source : flushinghospital




In this procedure, a small tubular stomach pouch is made by cutting of a large portion of the stomach, similar to sleeve gastrectomy. And then a portion of the small intestine is bypassed. This is considered to be the most effective to control blood sugar levels.


After sleeve gastrectomy is done, that is a large portion of the stomach is cut to make the remaining stomach to look like a small tubular structure or a banana, the first part of the small intestine (duodenum) is connected to a segment of the last portion of the small intestine. This is then connected to the outlet of new small tubular stomach. This allows the food that the patient eats to pass through the small stomach and reach directly to the last portion of the small intestine.

The gastric juices and enzymes in the small intestine is also carried to its distal end, where the food is digested and broken down. As the food is not digested until it reaches far down the small intestine, the amount of calories and nutrients absorbed is far less. And as the size of the stomach is small, the patient eats less. As the route of food is altered, it alters the gut hormones resulting in reduced hunger, increases satiety, and blood sugar control.

Duodenal Switch With Biliopancreatic Diversion

img-source : chennaimedtour



What Are the Complications of Bariatric Surgery?

Some of the common complications include:

Always talk to a doctor before deciding on getting any of the above mentioned surgeries. Make sure you are aware of all the risks that are associated with it. For more information, consult a metabolic surgeon online now.


This is a sponsored Ad. icliniq or icliniq doctors do not endorse the content in the Ad.

Last reviewed at:
03 Dec 2019  -  7 min read


7 Days COVID Care


Comprehensive Medical Second Opinion.Submit your Case

Related Questions & Answers

Will Adepix interfere with anesthesia during sleeve bariatric surgery?

Query: Hello doctor, I suppose to get the sleeve bariatric surgery and I was taking Adepix and I stopped it a week ago. My surgeon told me he thinks I have to be off Adepix for three months before surgery. I only took it for three weeks. Is this true? He said it may interfere with anesthesia?  Read Full »

Can liposuction be done for weight loss?

Query: Hi doctor, I am planning to go for liposuction to lose weight. My weight is 78 kg and height is 5'3". Kindly suggest.  Read Full »

Are my reports all right after bariatric surgery?

Query: Hi doctor, I am a 25 year old male. I had gastric sleeve surgery around 1.5 years ago. I have lost around 55 kg till now and now, my weight is 68 kg. I have not followed the dietary recommendations and vitamin and calcium supplements prescribed by the doctor for quite a long time. Now, I am in poor...  Read Full »

Popular Articles Most Popular Articles

Do you have a question on Weight Loss or Bariatric Surgery?

Ask a Doctor Online

* guaranteed answer within 4 hours.

Disclaimer: Alternative medicine is not aimed to replace the services of your treating physician or allopathy medicines. Our site’s information is to those who are willing to take responsibility for their health, being fully aware that the content published herein would not qualify as prescription or specific medical advice. If users use the information and stop prescribed medication without their physician’s consent, they bear full responsibility for their actions and iCliniq bears no responsibility for the same. Information on alternative medicine should not be misinterpreted as a cure for any illness, as our body is complex and everyone reacts differently.

Disclaimer: No content published on this website is intended to be a substitute for professional medical diagnosis, advice or treatment by a trained physician. Seek advice from your physician or other qualified healthcare providers with questions you may have regarding your symptoms and medical condition for a complete medical diagnosis. Do not delay or disregard seeking professional medical advice because of something you have read on this website.