Background: The aim of this study is to assess feasibility, relief of complications and mid- and long-term weight loss results following the conversion of open vertical banded gastroplasty (VBG) to Roux-en-Y gastric bypass (RYGB).
Materials And Methods: Retrospective analysis of patients undergoing conversion of open VBG to RYGB (open and laparoscopic) between 1 April 2000 and 1 January 2015 was performed. (Post)operative complications were listed. Weight loss was assessed using excess weight (EW), percentage excess weight loss (%EWL) and body mass index (BMI) at 1-year intervals after surgery. Ideal weight was determined by recalculating individual lengths to a BMI of 25 kg/m(2). Application of polynomial regression models was used to quantify weight loss over time.
Results: Ninety patients were identified in the database. Mean time between bariatric interventions was 9.6 years. Reasons for conversion were insufficient weight loss (82.2%) and outlet obstruction (17.8%). Early complications were encountered in eight patients of which three were reoperated. Patients who underwent conversion for inadequate weight loss after VBG were retrospectively analyzed regarding weight loss: 78.0% EWL after 1 year, 71.4% after 2 years, 62.1% after 3 years, 64.1% after 4 years, 70.2% after 5 years, and 68.9% after 6 years. Outlet obstruction was relieved in 94%. Patient satisfaction was assessed by telephone: 86.4% would repeat the conversion.
Conclusions: Conversion of open VBG to RYGB is feasible and safe and can be performed with an acceptable complication rate. It gives excellent weight loss results and relief of outlet obstruction.
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