Vertical Sleeve Gastrectomy—Open



Vertical sleeve gastrectomy (VSG) is an open surgery to decrease the structure and size of the stomach. This restricts the amount of calories your body absorbs.

The Stomach
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This surgery involves re-shaping the stomach to reduce the amount of food it can hold.
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Possible Complications

Problems from the procedure are rare, but all procedures have some risk. Your doctor will review potential problems, like:

  • Stitches or staples may loosen
  • Pouch stretches or leaks
  • Bleeding
  • Infection
  • Reaction to anesthesia
  • Heart attack
  • Blood clots
  • Nausea, vomiting

Long-term complications include vomiting and gallstones .

Before your procedure, talk to your doctor about ways to manage factors that may increase your risk of complications, such as:

  • Smoking
  • Drinking
  • Chronic diseases, such as diabetes



This content is reviewed regularly and is updated when new and relevant evidence is made available. This information is neither intended nor implied to be a substitute for professional medical advice. Always seek the advice of your physician or other qualified health provider prior to starting any new treatment or with questions regarding a medical condition.

Edits to original content made by Denver Health.

a (Sleeve Gastrectomy—Open; VSG—Open)


American Society for Metabolic and Bariatric Surgery 

Weight Control Information Network 


Canadian Obesity Network 

Weight Loss Surgery 


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Bariatric surgery for severe obesity. National Institute of Diabetes and Digestive and Kidney Diseases website. Available at: Updated June 2011. Accessed December 18, 2015.

Gastric sleeve. University of California, San Diego Health System website. Available at: Accessed December 18, 2015.

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3/23/2015 DynaMed's Systematic Literature Surveillance Short V, Herbert G, et al. Chewing gum for postoperative recovery of gastrointestinal function. Cochrane Database Syst Rev. 2015 Feb 20;2.