Table 7

Complications of bariatric surgery

ComplicationsFrequency, %, and outcomes
Sepsis from anastomotic leak (105)1–2
Hemorrhage (105)1–4
Cardiopulmonary events (105)
Thromboembolic disease (105)0.34
Late complications for AGBSurgical revision required in as many as 20 within 5 years
 Band slippage15
 Leakage2–5
 Erosion1–2
Late complications of bypass procedures
 Anastomotic strictures1–5
 Marginal ulcers1–5
 Bowel obstructions1–2
Micronutrient and macronutrient deficiencies from RYGB 2–3 years after surgery (105)
 Iron deficiency45–52
 Vitamin B12 deficiency8–37
 Calcium deficiency10
 Vitamin D deficiency51
Fat-soluble vitamin deficiencies (A, D, E, K) and protein calorie malnutrition from BPD and DS procedures1–5
  • AGB, adjustable gastric banding; BPD, biliopancreatic diversion; DS, duodenal switch; RYGB, Roux-en-Y gastric bypass.