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Gastric Bypass Roux-en-Y

What Is a Gastric Bypass Roux-en-Y?

A Gastric bypass Roux-en-Y is a type of weight-loss surgery that creates a new connection between a part of your stomach and part of the small intestine called the Roux limb, forming a “Y” shape. This way, the food you take will pass only through this new bypass.

At King’s we offer the Gastric Bypass procedure as part of our Weight Loss & Bariatric Programme.  An optional 6 month support package post surgery can be availed, to ensure you have the best opportunity to reach your weight loss goals.

Why Is the Surgery Done?

Gastric bypass surgery is usually done to treat morbid obesity by restricting the amount of fat and calories absorbed from your diet. Typically, the procedure is applied in order to reduce the risk of potentially life-threatening weight-related health problems.

Who Is the Surgery Recommended?

Gastric bypass surgery is mostly recommended if you suffer from morbid obesity. Your doctor might decide if the procedure is beneficial for you or not. The following conditions are required to qualify for the procedure:

  • BMI 40 or higher.
  • Obesity-associated serious health problems.
  • No history of gastrointestinal diseases.
  • Commit to healthy lifestyle changes.

Benefits and Potential Results

The gastric bypass procedure can be a very effective long-term way to lose weight, depending on how much you change your lifestyle habits. Losing  approximately 60% of your excess weight within two years can be possible.

Additionally, it may also improve some health conditions related to being overweight, including:

  • Diabetes
  • Hypertension
  • Hyperlipidemia
  • Heart diseases
  • Sleep apnea
  • Osteoarticular diseases
  • Infertility


Although we use the lasted minimally invasive surgery techniques, a gastric bypass involves major surgery, and as with any major surgery there are some possible risks.

Some of the risks associated with the surgical procedure itself include:

  • Bleeding.
  • Blood clots.
  • Breathing problems.
  • Gastrointestinal leaks

Long term post-surgery complications may include:

  • Malnutrition
  • Dumping syndrome, which includes diarrhea, nausea or vomiting
  • Gallstones
  • Bowel obstruction

Your Doctor will clearly explain any risks, and the post-surgery procedures to ensure the possibilities of complications are reduced.

Before Surgery

In order to be selected as a valid candidate for the procedure, your doctor might require some lab tests. Also, you need to inform them about your regular medication (blood-thinning, hypertension or diabetes medication) since there will be some restrictions on which you can take, as well as what you can eat and drink before the procedure.


During Surgery

Gastric bypass is now performed as a minimally-invasive procedure done by a Bariatric doctor through a laparoscopic technique. The procedure involves the following steps:

  • After making several small incisions in your stomach the surgeon will insert the laparoscopic instruments and cut across the top of your stomach and make a small pouch.
  • Part of your small intestine is cut and sewed directly into the stomach pouch.
  • Food now will pass directly to your small intestine, avoiding the absorption of fat and carbohydrates.

During the procedure, you will be sleeping under general anesthesia and monitored closely for any complication. The whole procedure will take a few hours.

After Surgery

Immediately after the procedure, you won’t be allowed to eat or drink for about 8 hours. After that, your diet will be gradually changing over liquid to solid and the amount of food will be changing as well. Since gastric bypass is major surgery, you may be at the hospital at least 3-5 days.  Also, your doctor will recommend you take vitamin and mineral supplements after your surgery because of the malabsorption system created.