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  • Omega loop gastric bypass

    A “mini gastric bypass” is a surgery where the stomach is reduced, and the digestive tract is diverted. This procedure, also known as the Omega loop gastric bypass or one-anastomosis gastric bypass, is comparable to the standard gastric bypass (see above). The procedure targets a limited food intake and a reduced nutrient absorption.

    During the surgery, the upper part of the stomach is first stapled to make a new small stomach (reduced stomach contents). This new gastric pouch is longer than the standard bypass and has the size of a kiwi.

    The small intestine is not sectioned but connected to the new stomach at 150cm to 200cm from the beginning of the small intestine. This means that no part of the stomach or small intestine is removed. This procedure establishes a bypass of the stomach and duodenum

    This procedure establishes a bypass of the stomach and duodenum so no food can pass anymore.

    Due to the reduced absorption of fats and vitamins, daily intake of vitamins is necessary after this surgery. In addition, it is strongly advised to limit the intake of sugars or the consumption of alcohol after this procedure in order to minimize the appearance of the phenomenon of dumping which can cause unconsciousness, sweating, palpitations and in exceptional cases, diarrhea.



    The results are comparable to those of the gastric bypass. Studies on large series of patients have shown that on average, three quarters of the excess weight are lost a year after the procedure.

    For example, in a patient with an excess weight of 50 kg, this means a weight loss of around 35 kg after 1 year. After 5 years, weight loss would still be 60% of the overweight. Of course, these results also depend on the adherence of the patient to the prescriptions.

    Other beneficial effects

    More than 90% of comorbidities (disorders due to the obesity) disappear or improve as a result of this procedure: high blood pressure, type II diabetes, back pain, sleep apnea, depression and others.

    Comorbidities resolved or improved after mini-gastric bypass.

    Description: GB invloed op co morb

    Advantages of mini gastric bypass :

    • Beneficial effect on diabetes, sleep apnea, blood pressure, etc.
    • The procedure is reversible, and a simple revision is possible.
    • Fast feeling of satiation
    • Decreased feeling of hunger.

    Disadvantages of mini gastric bypass:

    • Vitamin deficiency.
    • Reflux of bile in the stomach or esophagus. A minority must be converted to a standard gastric bypass.
    • Dumping complaints when consuming sugars.