A mini gastric bypass is a procedure done on the stomach and intestines to help people lose weight. It is a type of bariatric surgery.
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A mini-gastric bypass is a treatment for obesity. The procedure will help limit overeating and decrease how many calories you absorb.
A mini gastric bypass may be recommended for people with a:
This procedure may be done after a person has failed to lose weight through other methods such as healthful eating and exercise.
Benefits of bariatric surgery will depend on lifestyle changes that are also adopted. Benefits may include:
Problems from the procedure are rare, but all procedures have some risk. Your doctor will review potential problems, like:
Conditions that may develop after surgery may include:
Problems are more common in older adults. Factors that may increase the risk of problems include:
Talk to your doctor about these risks before the procedure.
Each bariatric surgery program has specific requirements. Your program will likely include:
Before your procedure:
General anesthesia will be used to. You will be asleep during the surgery.
An IV line will be placed in your arm. Fluids and medication will be delivered through this line during the procedure. A breathing tube will be placed through your mouth and into your throat. It will help you breathe during surgery.
Small incisions will be made in the abdominal wall. A camera and surgical instruments will be passed through these incisions. The stomach will be divided into 2 parts. One part will be reconstructed to resemble a tube. The first part of the small intestine will then be bypassed by connecting the stomach tube to a section of the small intestine further down than previous attachment point.
The small incisions will be closed. Bandages may be placed over the incision sites.
After the operation, you will be taken to the recovery room for observation.
About 1 ½ to 2 ½ hours
Anesthesia prevents pain during surgery. As you recover, you may have some pain. You will be given pain medication.
Eating too much will cause discomfort. Work with a dietitian to create a meal plan that will provide enough nutrition without causing discomfort.
This is done in a hospital. The usual length of stay is 2 days. If you have any problems, you may need to stay longer.
While you are recovering at the hospital, you may receive the following care:
Your stomach will not only be smaller, but will also be swollen after surgery. This will limit the types and amount of food you can eat. You will be started on liquids only. Medications or vitamins may also need to be crushed up or taken as liquid.
While in the hospital, you may be asked to do the following:
For best success, you will need to practice lifelong healthy eating and exercising habits. Walk as soon as possible. Make a goal to exercise daily.
You will meet regularly with your healthcare team for monitoring and support.
You may have emotional ups and downs after this surgery. Ask your doctor about support groups or counseling that may help.
Your new stomach is small and slow to empty, causing you to feel full quickly. Therefore, you need to eat very small amounts and eat every slowly. Some basic steps may include:
Call your doctor if any of these occur:
If you think you have an emergency, call for emergency medical services right away.
American College of Gastroenterology
American Society for Metabolic and Bariatric Surgery
Canadian Association of Gastroenterology
Weight Loss Surgery
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Maciejewski ML, Livingston EH, Smith VA, et al. Survival among high-risk patients after bariatric surgery. JAMA. 2011;305(23):2419-2426.
Obesity surgery: Weight loss surgery. Cleveland Clinic website. Available at: https://my.clevelandclinic.org/health/treatments/17285-obesity-surgery/weight-loss-surgery. Accessed January 15, 2013.
Weight loss surgery (bariatric surgery). Boston Medical Center website. Available at: https://www.bmc.org/weight-loss-surgery/options. Accessed January 10, 2018.
Your bariatric surgery experience. Allegheny Health Network website. Available at: https://www.ahn.org/specialties/bariatric-and-metabolic-institute/your-bariatric-surgery-experience. Accessed January 10, 2018.
Last reviewed November 2018 by EBSCO Medical Review Board Daus Mahnke, MD