Acute renal failure is typical in patients with renal cortical necrosis, with associated complications (eg, hyperkalemia, fluid overload). Chronic renal failure, occurring in 30-50% of patients, requires dialysis and transplantation.
The average hospital stay is 1 to 3 nights which varies depending on type of surgery and your overall condition. Duodenal switch surgery: 2 to 3 days; Gastric bypass surgery: 2 to 3 days; Gastric sleeve surgery: 2 to 3 days; Mini gastric bypass: 2 to 3 days; Gastric banding surgery (LAP-BANDÂ®): 1 day or less; Gastric Balloon: Same-day (outpatient)
The risk of complications is lower at centers that do more than 100 weight loss surgeries per year. Deaths in the month following gastric bypass surgery are very rare (about 0.2% to 0.5%, or less than one in 200 people) when the procedure is done by a highly experienced surgeon.