Roux-en-Y gastric bypass is a surgery for obesity. It changes the stomach and small intestine to cause weight loss by:
The surgery treats severe obesity. A calculation called body mass index ( BMI) is used to determine how overweight or obese you are. A normal BMI is 18.5-25.
Roux-en-Y gastric bypass is a weight loss option for people with:
The success of gastric bypass surgery depends on your commitment to lifelong health habits. If lifestyle changes are made and maintained, the benefits of bariatric surgery include:
If you are planning to have Roux-en-Y gastric bypass, your doctor will review a list of possible complications, which may include:
Long-term complications include vomiting and gallstones.
Factors that may increase the risk of complications include:
Before the procedure, you will likely have the following:
Leading up to your procedure:
General anesthesia will be used. You will be asleep.
To prepare you for surgery, an IV will be placed in your arm. You will receive fluids and medications through this line during the procedure. A breathing tube will be placed through your mouth and into your throat. This will help you breathe during surgery. You will also have a catheter placed in your bladder to drain urine.
An 8-10 inch incision will be made to open the abdomen. Surgical staples will be used to create a small pouch at the top of your stomach. This pouch, which can hold about one cup of food, will be your new, smaller stomach. A normal stomach can hold 4-6 cups of food.
Next, the small intestine will be cut attached to the new pouch. With the intestinal bypass, food will now move from the new stomach pouch to the middle section of the small intestine. It will skip the lower stomach and the upper section of the small intestine.
Finally, the upper section of the small intestine will be attached to the middle section of the small intestine. This will allow fluid that the lower stomach makes to move down the upper section of the small intestine and into the middle section.
When the bypass is completed, the incisions will be closed with staples or stitches.
You will be taken to the recovery area for monitoring. You will also be given pain medication.
Anesthesia prevents pain during surgery.
You will have pain and/or soreness at the incision sites during recovery. You will be prescribed medication to relieve the pain.
The usual length of stay is 2-5 days. Your doctor may choose to keep you longer if complications arise.
While you are recovering at the hospital, you may receive the following care:
While in the hospital, you may be asked to do the following:
Be sure to follow your doctor’s instructions. You will need to practice lifelong healthy eating and exercising habits. Keep in mind after your surgery:
Your new stomach is the size of a small egg. It is slow to empty, causing you to feel full quickly. Therefore, you need to eat very small amounts and eat very slowly:
After you leave the hospital, call your doctor if any of the following occur:
In case of an emergency, call for medical help right away.
American Society for Metabolic and Bariatric Surgery
Weight Control Information Network
BC Health Guide, British Columbia Ministry of Health
Canadian Laparoscopic Weight Loss Surgery
Gastrointestinal surgery for severe obesity. National Institute of Diabetes and Digestive and Kidney Diseases website. Available at: http://win.niddk.nih.gov/publications/gastric.htm. Updated June 2011. Accessed December 9, 2013.
Obesity risks add to complications of gastric bypass [news release]. Duke University Medical Center website. Available at: http://www.dukemednews.org/news/article.php?id=7217. Accessed December 9, 2013.
Roux-en-Y gastric bypass. Cleveland Clinic website. Available at: http://my.clevelandclinic.org/services/procedure_treatment/gastric_bypass_surgery/roux-en-y.aspx. Accessed December 9, 2013.
Roux-en-Y gastric bypass. Columbia University Medical Center website. Available at: http://obesitymd.org/gastric.html. Accessed December 9, 2013.
Roux-en-Y gastric bypass weight-loss surgery. Johns Hopkins Medicine website. Available at: http://www.hopkinsmedicine.org/healthlibrary/test_procedures/gastroenterology/roux-en-y_gastric_bypass_weight-loss_surgery_135,65/. Accessed December 9, 2013.
9/2/2009 DynaMed Systematic Literature Surveillance http://www.ebscohost.com/dynamed: The Longitudinal Assessment of Bariatric Surgery (LABS) Consortium. Perioperative safety in the longitudinal assessment of bariatric surgery. N Engl J Med. 2009;361:445-454.
6/24/2011 DynaMed's Systematic Literature Surveillance http://www.ebscohost.com/dynamed: Pontiroli AE, Morabito A. Long-term prevention of mortality in morbid obesity through bariatric surgery. a systematic review and meta-analysis of trials performed with gastric banding and gastric bypass. Ann Surg. 2011;253(3):484-487.
Maciejewski ML, Livingston EH, Smith VA, et al. Survival among high-risk patients after bariatric surgery. JAMA. 2011;305(23):2419-2426.
Last reviewed December 2013 by Marcin Chwistek, MD; Michael Woods, MD
Please be aware that this information is provided to supplement the care provided by your physician. It is neither intended nor implied to be a substitute for professional medical advice. CALL YOUR HEALTHCARE PROVIDER IMMEDIATELY IF YOU THINK YOU MAY HAVE A MEDICAL EMERGENCY. Always seek the advice of your physician or other qualified health provider prior to starting any new treatment or with any questions you may have regarding a medical condition.