What is the "Goldilocks" length in Bariatric Surgery? By Edmund B. Chen on April 27, 2023

Sadi-s surgery for more weight lossIn a SADI-S surgery, a loop of small intestine is brought up and connected to the end of the sleeve stomach.  This loop of small intestine is typically 300 cm from the end of the small intestine.  In this configuration, approximately 50-60% of the small intestine is bypassed, leaving 300 cm available to absorb calories. 

Why is it 300 cm?  Studies have shown that this the “Goldilocks” length of small intestine.  If we make this loop of small intestine too short, for example only 100 cm, there may be slightly more weight loss, but there will not be enough small intestinal length available to absorb necessary vitamins, resulting in higher chances of malnutrition.  In contrast, if we make this loop too long, for example 600 cm, there will be too much small intestine available to absorb calories, and therefore, there will not be enough weight loss.  

Studies have shown that 300 cm seems to be the right amount of small bowel length.  300 cm is enough small intestine to absorb vitamins and therefore, rates of malnutrition or chronic diarrhea are low.  300 cm is also short enough that there is excellent weight loss after surgery, with average excess weight loss between 70-90%.  The SADI-S therefore offers more average weight loss than the sleeve or gastric bypass.  The SADI-S is an excellent primary / initial bariatric surgery and is also a great option for revisional surgery after a sleeve gastrectomy.


Related to This

dr joe cribbins and dr edmund chen DAVINCI robotic bariatric surgeons voted best doctors of Dallas, TX

Texas Center for
Bariatrics & Advanced Surgery

Our highly skilled and experienced board-certified surgeons specialize in ultra-minimally invasive general and bariatric surgery. They are affiliated with a number of national associations, including the:

  • American Board of Surgery
  • American Society for Metabolic and Bariatric Surgery (ASMBS)
  • American College of Surgeons (ACS)
  • Fellow American Society for Metabolic and Bariatric Surgery (FASMBS)

To request a consultation, contact us online or call (214) 501-1333 today.

Contact Us Today

This contact form is for appointments only.
For more information or medical concerns, you can reach our office at (214) 501-1333.
If this is a medical emergency, please call 911.

Rate, Review & Explore

Social Accounts Sprite