Weight Loss Surgery or Bariatric Surgery
(Gastric Bypass, Lap Band, Stomach Stapling)
IntroductionThe way people burn
fat
is that they
take in fewer calories than they use.
Weight loss surgery changes the anatomy of your stomach and intestines
so that you are forced to eat less, or it causes your gastrointestinal
tract to absorb less of the food you eat. These surgeries are major
interventions and are generally a last resort after all other efforts
of weight loss have failed. There are two main types of weight loss surgeries: restrictive and malabsorptive.
The restrictive types of surgeries basically make it so that your
stomach cannot hold as much food. This would cause you to eat less. The
malabsorptive types of surgeries cause food to bypass part of your
intestines. This causes less of the calories you eat to be absorbed by
your body.

Before Weight Loss Surgery
Restrictive Surgeries
Stomach
stapling (or gastroplasty) is where the surgeon will staple off part of
your stomach, leaving a smaller space for food to go after you swallow
it and before it reaches your intestines. This stomach stapling surgery
generally causes a person to lose 60% of his/her excess weight, but
much of that weight is regained in the next 5-10 years.

Stomach Stapling
In the lap band weight
loss surgery, an inflatable band is place around part of the stomach.
This creates a pouch with a narrow opening. The pouch holds a smaller
amount of food than a normal stomach, and the narrow opening slows down
the rate at which food leaves the pouch and goes to the rest of your
stomach. This is a
laparoscopic
weight loss surgery, which means only small incisions are made.
Therefore, it leaves you with smaller scars. The stomach band can also
be adjustable by injecting or removing saline water through a port
under the skin. This gives the pouch an opening that can be changed
without have to do more surgery. The
lap band procedure gives about a 35-50% loss of excess weight in the
short term. The components can fail over time and there is a high rate
of repeat surgeries needed to fix them. Also, of the people who have
this procedure done a large percentages of them see improvements in or
cures of some major diseases: 80% for diabetes, 70% for high blood
pressure, and 60% for cholesterol levels. The lap band has the lowest risk of death with the procedure. 
Lap Band
Malabsorptive Surgeries These
procedures change the connections of the intestines so the food only
passes through some of your bowels. Intestines are not removed. They
are still there. They are just bypassed by your food. This means not as
many of the calories and nutrients that you eat can be absorbed by your
body.

Gastric Bypass
Combination Restrictive and Malabsorptive Surgery The technical name for this type of weight loss surgery is called proximal Roux-en-Y gastric bypass.
That is quite a mouthful! The main point of this operation is that it
causes you to eat less by causing you to have less room in your stomach
and then causes your body to absorb fewer calories and nutrients
because food bypasses a large part of your intestines. This
surgery may have to be performed in two separate stages with the
restrictive part being performed first to cause some initial weight
loss and the malabsorptive part being done later. Initially,
people lose about 65-75% of their excess weight. After 5 years, people
end up with about a 50-60% excess weight reduction. In addition to
weight loss, 90% of people see improvement in their diabetes and high
blood pressure. 95% of people see improvement in their cholesterol
levels.

Roux-en-Y Gastric Bypass
A Quick Word about Liposuction The way
liposuction
works is a surgeon uses a probe to inject fat with saline and then
sucks the fat out of a person’s body. This can help give a person a
slimmer appearance. However, after undergoing this procedure, your risk
for heart disease does not go down and people with diabetes do not
improve their bodies’ ability to use insulin. These benefits are seen
with other weight loss methods. Therefore, liposuction is a cosmetic
procedure and not a way to improve your health. In order to achieve
these benefits, you need to shift the balance of your daily calories in
the direction of weight loss.
...Continue to Page 2 of Weight Loss Surgery
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It is important you discuss any weigh loss or exercise plan with your
doctor. Only you and your physician can decide what is best for you.
Some people have certain conditions that prevent them from doing all
exercises, and goal body weights may be different for different people.
You need to discuss all these things with your physician before
starting any weight loss or exercise program. Dr. Vickery is not a
surgeon. For more specifics on surgical procedures, contact a board
certified bariatric surgeon. This article was written by John Vickery, MD.
References New England Journal of Medicine 2007;356:2176-2183 New England Journal of Medicine 2007;357:753-761 Ann Intern Med 2005;142:525-531 Treatment Guidelines from the Medical Letter 2003;1:101-106 “Overview of therapy for obesity in adults” Up To Date version 15.3 Treatment Guidelines from the Medical Letter 2008;6:23-28
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