Weight loss surgeries:

Gastric banding is an adjustable band  
inserted with  a small incision and
wrapped  around the top of the
stomach, giving the patient the illusion
of fullness with small meals;

Gastric bypass surgery known as
Roux-en-Y the stomach is closed off
near the top, creating a small pouch, it
is done laparoscopically;

Both Johnson & Johnson and Allergan
Inc make bands for weight-loss surgery.