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Roux-en-Y Gastric Bypass — risks and complications
6 documented risks. Severity reflects clinical significance, not probability.
Anastomotic leak at gastrojejunostomy
severe2.00% (1.00–4.00%)Prevention: Reinforced anastomosis; intra-operative leak test; experienced surgeon.
Sources: ifso-bariatric-standards
Internal hernia (lifetime)
severe3.00% (1.00–5.00%)Prevention: Closure of mesenteric defects intra-operatively.
Sources: ifso-bariatric-standards
Marginal ulcer
moderate5.00% (2.00–10.00%)Prevention: PPI prophylaxis post-operatively; smoking cessation; NSAID avoidance.
Sources: ifso-bariatric-standards
Anastomotic stricture
moderate5.00%Prevention: Careful anastomotic technique.
Sources: ifso-bariatric-standards
Vitamin / mineral deficiency
moderate40.00% (20.00–60.00%)Prevention: Lifelong supplementation; annual surveillance bloods.
Sources: ifso-bariatric-standards
DVT/PE
severe0.50%Prevention: Mechanical and pharmacological prophylaxis; early mobilisation.
Sources: nice-ng89-venous-thromboembolism