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WHAT WE DO

Gastric Bypass

what is a GASTRIC BYPASS?

What is Laparoscopic Roux-en-Y Gastric Bypass?

Gastric bypass

Laparoscopic Roux-en-Y Gastric Bypass (RGB) is the current “gold standard” weight control operation. It is the operation to which all other procedures are compared. The operation is truly a bypass of the stomach. The stomach is bypassed so that food eaten goes into a small gastric pouch (50ml) and then into a loop of small bowel (the jejunum). It is not a pancreaticobiliary bypass or intestinal bypass.

The operation has gained popularity because:

  1. It produces significant and sustainable weight loss in most patients. Median weight loss at 12 months is 60-70% of a patient’s excess weight. Approximately 50% excess weight loss is maintained after 15 years post-operatively.
  2. As a consequence of the weight loss, there is loss (or cure) of obesity-related complications such as diabetes, lipid abnormalities, sleep apnoea, etc. Currently, it is the only operation that has been shown to reduce mortality in the morbidly obese.
  3. The operation can be done at an acceptable mortality (0.5-1.0%) in this high-risk group. Morbidity is low with few post-operative side-effects and few nutritional deficiencies. Quality of life is good with minimal gastrointestinal side-effects. Macronutrient malabsorption does not occur, however, micronutrient malabsorption such as B12, calcium and iron are predictable problems that are easy to treat with supplementation.

HOW DOES THE GASTRIC BYPASS WORK?

Weight is lost by the following 4 mechanisms:

  • Early fullness is induced by the small gastric pouch.
  • Over-eating is prevented by the small pouch. Too much food causes discomfort and regurgitation.
  • Patients become intolerant to sweets as the rapid presence of sugar in the small bowel leads to unpleasant symptoms called “dumping”. Hence, there is a tendency to avoid sweet and fatty foods.
  • Most importantly, the operation results in suppression of appetite. This is thought to occur due to the rapid entry of foods into the small bowel which evokes a hormonal effect that induces satiety. It is thought that a similar hormonal response is responsible for the 75% cure rate of Type II Diabetes following gastric bypass.

WHAT IS LIFE LIKE WITH A GASTRIC BYPASS?

You will be less hungry and also feel satisfied after eating small meals. The amount of food you eat is approximately 25% of your previous diet. When dining out at a restaurant, you can eat an entrée-sized meal and feel satisfied. The key point being that a small meal satisfies you, hence the experience is different from dieting and therefore sustainable in the long-term.

Sweets and fatty foods are poorly tolerated and best avoided. These foods will cause “dumping” due to the rapid presence of high osmolality fluid in the small bowel. Symptoms are nausea, dizziness, palpitations, sweating and abdominal discomfort. To avoid dumping, high sugar and high fat content foods should be avoided, and food should be eaten dry and not mixed with fluids. You will also need to avoid snacking, especially with junk foods, as this will greatly negate the effects of the surgery.

Apart from a commitment to healthy eating, no other foods are specifically banned.

Multivitamins and calcium supplementation must be taken daily by all gastric bypass patients. Vitamin B12 and iron supplements are also recommended. These requirements are life-long and critical to good health.

We provide lifestyle modification programs tailored to you, to support your weightloss and health goals. Book your FREE eligibility assessment call.

Your weight loss journey begins with these 4 easy steps.

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Step 1

Book your FREE eligibility assessment

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Step 2

Pre-treatment Nurse Practitioner and Dietitian Assessment

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Step 3

Sign-up to your Weight Loss Programme

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Step 4

Procedure date / Treatment commencement appointment

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Step 5

Consistent follow-up with Clinicians post treatment as per your chosen Weight Loss Programme

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