Related Experiment Video
Updated: Jul 30, 2026

Roux-en-Y Gastric Bypass Operation in Rats
Published on: June 11, 2012
[Kinetics of loss of body weight after intestinal by-pass]
Abstract:
Changes in body weight (absolute and percent), overweight index, and body surface area were examined in 27 grossly obese subjects after jejunal-ileal by-pass. Curves were steeper and linear for 3-4 months and then flattened out for the remainder of the twelve-month period of observation. They were parallel to each other even when a division was made between patients weighing more and less than twice their ideal weight. This shows that if a person weighs more than 120 Kg his weight loss curve will depend on the time that has elapsed since surgery. It is virtually independent of the start value.
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