a) VBG produces less weight loss when compared to RYGB
b) Jejuno-ileal by-pass not done nowadays.
c) Dumping is due to non- compliance of dietary advice
d) LAGB requires once a 4-6wk follow up
Calorie restriction is responsible for long term weight loss and its beneficial effects such as control of diabetes, dyslipidemia, hypertension and other metabolic abnormalities.
Restrictive procedures are LSG and LAGB which decrease the appetite and induce early satiety.
The RYGB (ROUX en Y gastric bypass ) is a malabsorptive procedure with long term sustained weight loss.
Mechanism of weight loss after bariatric surgery
Ghrelin is orexigenic gut hormone, which increases appetite. After food intake ghrelin levels fall and appetite decreases.
After restrictive surgery such as LYGB and LSG, ghrelin levels fall and appetite decreases.
Vertical Banded Gastroplasty (VBG) This procedure has been abandoned in favor of other operations because of poor long-term weight loss, a high rate of late stenosis of the gastric outlet, and a tendency for patients to adopt a highcalorie liquid diet, thereby leading to regain of weight. Choice a is correct