What Is A Gastric Bypass
A gastric bypass is a surgical
procedure carried out on the stomachs of patients who are obese
and need to lose weight urgently.
A gastric bypass is often recommended to
patients who have been unable to lose weight by more
traditional methods such as strict dieting and
intensive exercise programs set by their
In the US, those who tend to be considered by their
physicians as candidates for gastric bypass surgery are those
with a body mass index (BMI) of 40 or more, or, less typically,
patients with a BMI ranking between 35 and 40 who also suffer
from a serious disease like diabetes that could be
significantly relieved by gastric bypass surgery.
The majority of gastric bypass procedures involve
restrictive surgery, which is more commonly known as ‘stomach
stapling’. This form of surgery involves a reduction in the
volume of the patient’s stomach, in order that they begin to
feel full after eating much smaller amounts of food.
The typical result of this gastric bypass is an accordant
decrease in the patient’s calorie intake, causing a reduction
in their weight in the medium or long term. The ‘pouch’ of
stomach left intact by the gastric bypass surgeon at first
holds only one ounce of swallowed food, but in time expands,
eventually able to store between two and three ounces.
Research suggests that roughly 30% of patients undergoing
gastric bypass surgery go on to achieve and sustain an average
weight, and that roughly 80% do experience weight loss of some