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)
Patients of gastric bypass can expect to lose about 60-75% of their excess body weight total (over a period of time). According to the University of Michigan, the average weight loss for gastric bypass surgery patients is 5-15 pounds per week for the first 2 to 3 months tapering off to 1-2 pounds a week after the first six months.