Classical Roux en Y Operation (RNY)
Roux en Y (RNY) or gastric bypass is a restrictive procedure
that staples off an approximate ½-1 ounce stomach pouch
at the upper portion of the stomach. A section of small bowel
is then attached to the pouch via a small opening, which is
to simulate the pyloric valve. . Narrowing and or blockages
can take place at this small opening. Ulceration can also happen
at the area where the small bowel and the stomach tissue are
attached. The pyloric valve is bypassed in this procedure.
Because of the small pouch size vomiting can take place if
food is not properly chewed or food is eaten too fast or too
large a volume. Dumping syndrome is also takes place when consuming
high sugar containing food.

Image courtesy of ETHICON
Vertical Banded Gastroplasty: (VBG)
VBG) is another restrictive procedure that only limits the
amount of food. The stomach is portioned off with staples
and then a stilastic ring is put into the gastric tissue
to simulate the pyloric valve and to restrict the amount
of food eaten at a given time. This procedure has had a
high failure rate with regaining of weight and staple line
disruption.

Image courtesy of ETHICON
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