How Is Sleeve Gastrectomy Performed?
We perform the sleeve gastrectomy as a laparoscopic procedure. This involves making five or six small incisions in the abdomen and performing the procedure using a video camera (laparoscope) and long instruments that are placed through these small incisions.
During the laparoscopic sleeve gastrectomy (LSG), about 75% of the stomach is removed leaving a narrow gastric “tube” or “sleeve”. No intestines are removed or bypassed during the sleeve gastrectomy. The LSG takes one to two hours to complete.
How Does Sleeve Gastrectomy Cause Weight Loss?
Sleeve gastrectomy is a restrictive procedure. It greatly reduces the size of your stomach and limits the amount of food that can be eaten at one time. It does not cause decreased absorption of nutrients or bypass your intestines. After eating a small amount of food, you will feel full very quickly and continue to feel full for several hours.
Sleeve gastrectomy may also cause a decrease in appetite. In addition to reducing the size of the stomach, sleeve gastrectomy may reduce the amount of "hunger hormone" produced by the stomach which may contribute to weight loss after this procedure.
Who Do We Offer Laparoscopic Sleeve Gastrectomy?
This procedure is primarily used as part of a staged approach to surgical weight loss. Patients who have a very high body mass index (BMI) or who are at risk for undergoing anesthesia or a longer procedure due to heart or lung problems may benefit from this staged approach. Sometimes the decision to proceed with a two-stage approach is made before surgery due to these known risk factors. In other patients, the decision to perform sleeve gastrectomy (instead of gastric bypass) is made during the operation. Reasons for making this decision intraoperatively include an excessively large liver or extensive scar tissue that would make the gastric bypass procedure too long or unsafe.
In patients who undergo LSG as a first stage procedure, the second stage (gastric bypass) is performed 12 to 18 months later after significant weight loss has occurred and the risk of anesthesia is much lower (and the liver has decreased in size). Though this approach involves two procedures, we believe it is safe and effective for selected patients.
Laparoscopic sleeve gastrectomy can also be used as a primary procedure. There is relatively little data regarding the use of LSG as a stand-alone procedure in patients with lower BMI’s and it should be considered an investigational procedure in this patient group.
What Are The Risks Of Laparoscopic Sleeve Gastrectomy?
There are risks that are common to any laparoscopic procedure such as bleeding, infection, injury to other organs, or the need to convert to an open procedure. There is also a small risk of a leak from the staple line used to divide the stomach. These problems are rare and major complications occur less than 1% of the time.
Overall, the operative risks associated with LSG are slightly higher than those seen with the laparoscopic adjustable band but lower than the risks associated with gastric bypass.
What Are The Benefits Of Laparoscopic Sleeve Gastrectomy?
Depending on their pre-operative weight, patients can expect to lose between 40% to 70% of their excess body weight in the first year after surgery.
Many obesity-related comorbidities improve or resolve after bariatric surgery. Diabetes, hypertension, obstructive sleep apnea and abnormal cholesterol levels are improved or cured in more than 75% of patients undergoing LSG. Though long-term studies are not yet available, the weight loss that occurs after LSG results in dramatic improvement in these medical conditions in the first year after surgery.
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