Bariatrische chirurgie: hoe, wanneer, wat en bij wie?

• Bariatric surgery is performed in patients with a body mass index (BMI) > 40kg/m², or BMI > 35 kg/m² with obesity-related comorbidities. The Roux-en-Y gastric bypass and sleeve gastrectomy are the most frequently used procedures.
• On average, patients have lost 25-27% of their original weight 10 years after surgery.
• Obesity-related comorbidities improve dramatically in many patients following surgery. The effect is most noticeable in patients with diabetes mellitus type 2 and obstructive sleep apnoea syndrome.
• The prevalence of 30-day complications is < 5%. Mortality is < 0.2% in centres with a lot of experience.
• Commonly occurring long-term complications of bariatric surgery include deficiencies, particularly of iron and vitamin B₁₂, along with gallstone disease and sagging skin.
• Specific complications can arise following Roux-en-Y gastric bypass, such as internal herniation and hypoglycaemia, and these are often not recognised.

Conflict of interest and financial support: ICMJE forms provided by the authors are available online along with the full text of this article.