Table 3.

Summary of Bariatric surgery procedures in management of obesity:

Bariatric surgery	Mechanism	Weight loss	Side effects
Roux-en-Y Gastric Bypass (RYGB)	A gastric pouch and a bypass that diverts food from the body of the stomach, duodenum, and proximal jejunum	12% -45% of total body weight (TBW) loss at 6 months-3 years	Malabsorption, herniation, stricture of anastomosis, fistula
Sleeve Gastrectomy	Stomach is resected longitudinally creating a tubular stomach.	49% of excess body weight at 5 years	Accelerating gastric emptying
Gastric banding	A band placed at the proximal portion of the stomach and connected to a subcutaneous balloon	16% TBW at 3 years	Gastric pouch enlargement, GERD and erosion
Intermittent vagal blockade	Early satiety stimulation by vagal blockade	24% of excess body weight at 1 year	Heartburn and abdominal pain
Biliopancreatic diversion with duodenal switch	Gastrectomy and an anastomosis between proximal duodenum and a portion of bypassed intestine	15%, 18% and 18% of excess body weight at 2, 5 and 10 years	High incidence of short- and long-term complications with high degree of malabsorption