There is both long and short limb gastric bypass surgeries (along with several other variations on intestinal bypass procedures). How much of the jejunum is bypassed with a long-limb and short-limb gastric bypass?


One of the most used surgical technique is Roux en-Y where the small intestine is divided approximately 40-50 cm below the lower stomach outlet and is re-arranged into a Y-configuration.

The portion of intestine (jejunum) from the upper stomach is called the "Roux limb". It has a total length of 80 - 150 cm.

So the Roux en-Y technique "bypasses" only the duodenum and a small portion of jejunum - no more than 50 cm, that's about 7-10% of total length of small intestine.

Total gastrectomy with Roux-en-Y.png
"Total gastrectomy with Roux-en-Y" by ignis - Own work. licensed CC BY-SA 3.0 via Wikimedia Commons.

Reference: Wikipedia contributors, "Gastric bypass surgery," Wikipedia, The Free Encyclopedia, http://en.wikipedia.org/w/index.php?title=Gastric_bypass_surgery&oldid=606081291 (accessed June 27, 2014).

| improve this answer | |

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.