Operation procedure and follow-up
BLOOD
All surgical procedures are performed by experienced bariatric surgeons. First, a gastric pouch of 25 cc is created. A 50-cm biliopancreatic limb is measured and the gastrojejunostomy is created using an endostapler and a continuous, absorbable suture. A side-to-side jejunojejunostomy is created using an endostapler and a continuous, absorbable suture, with an alimentary limb of 150 cm.Afterwards, a transsection between both anastomoses of the jejunum is performed.If the surgery is uncomplicated, patients are discharged from the hospital after one or two nights. Patients attend the outpatient clinic frequently during the first 5 years after surgery. During these visits, patients are assessed by the various members of the multidisciplinary bariatric team, e.g., surgeons, medical doctors, nurses, dieticians, and psychologists. Also, all patients are referred to the “movement program” unless physical activity is already well integrated in their pre-operative life. This program is a 10-week course of supervised physical training twice a week. Referrals are equal for both study groups. Blood samples are analyzed at multiple time points to screen for deficiencies or other abnormalities.Study assessments take place during regular follow-up at the outpatient clinic. No additional visits are required.