Duodenal Switch

To find out more about this procedure follow the links below to our partner Phoenix Health

The duodenal switch (DS) is a procedure to induce weight loss in patients which involves bypassing most of the small intestine. It is performed in combination with a sleeve gastrectomy.

A duodenal switch causes significant malabsorption of fat as well as, to a lesser degree, carbohydrate. As such, a patient’s ability to absorb fat-soluble vitamins (A,D, E and K) is also affected and therefore they will need to take high dose supplements for life, such as vitamins A and D, mineral/multivitamins and calcium.


The operation is only used with extreme caution and should only be performed in designated centres of expertise. We have a large amount of experience with the procedure but it still only makes up 2% of our caseload.

Such an extensive intestinal bypass can bring the potential of protein energy malnutrition. The duodenal switch does allow for some protein absorption (unlike some older procedures), but a strict high protein (>100g/day) diet will be mandatory in order to avoid a deficiency. There will also be regular post-operative follow ups and blood tests which patients must commit to.

The duodenal switch has the best weight regain statistics of all the bariatric operations, as well as the best results for the heaviest (BMI >60) patients, the highest excess weight loss (approx. 90%) and the highest rate of diabetes resolution (>90%). However, the success comes at a price and the operation should only be performed on highly motivated patients who will commit to the extensive, on-going follow-ups.

  • Arranging your Treatment

    Before going ahead with this treatment, you will need to have an initial consultation with a specialist Consultant to go through your medical history and diagnosis. At this appointment, your consultant will confirm the exact treatment you require.
    If you would like to have an initial consultation, you can call us and we can help you find the consultant best for you.

    Alternatively, if you have already been diagnosed as needing a particular operation or treatment, our Reservations team can give you a guide price for this to be carried out at KIMS Hospital and book an appointment for you to meet a consultant.
    Call our Reservations team on +44 (0) 1622 237 727 or email reservations@kims.org.uk.

  • Paying for your Treatment

    You can be treated at KIMS by using your private medical insurance or by paying for yourself.

    If you have private medical insurance, Iyou will need to contact your insurer to ensure you are covered for the initial consultation prior to making an appointment and obtain an authorisation number. The insurance company will then need to be advised if you require further treatment. The insurance company usually settles bills on your behalf.

    If you are paying for your own treatment, you will need to pay for an initial consultation.This will be confirmed at the time of booking but is typically £150-£250. You will also need to pay for any associated diagnostic tests your consultant recommends (for example x-rays and blood tests).

    Following this consultation, if you don’t need any further treatment or if you decide paying for yourself isn’t the right option, there is no commitment to proceed further.

    If you require the operation or procedure to be carried out, you will receive a quote for your treatment. In most case this will be the fixed price package quoted on this website. If this quote is different for any reason, we will provide an explanation. This quote is also subject to pre-assessment checks prior to your admission to hospital.

    Payment is required 7 days prior to admission.

Our Consultants

  • Professor David Kerrigan

    • Band on Bypass
    • Duodenal Switch
    • Gastric Band
    • Gastric Bypass
    • Gastric Sleeve