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5.5 Excess Weight Loss

Weight reduction outcomes are not generally different from open gastric bypass surgery, which are known to be excellent. Between 72% and 82% of the excess weight, (excess weight: actual weight minus ideal weight), are lost in the first year after LRYGBP (diagram 1).

Suter et al. (2002) evaluated their results on the basis of success parameters and found the results to be very good (diagram 2).

The BMI drops parallel to the loss in body weight (diagram 3). This diagram shows the change in body mass index in patients with a BMI of less or more than 50kg/m2.

Diagram 1:
Excess weight loss (EWL) after laparoscopic gastric bypass surgery. More than 90% of morbid obesity patients (BMI 40-50) report a definite success after 18 months.

Diagram 2:
Success rate after laparoscopic gastric bypass surgery according to the criteria specified by Reinhold. (Excess weight loss <25%, 25-30%, 50-75% and >75%).

Diagram 3:
Body mass index after laparoscopic gastric bypass surgery. Different curves are obtained for the populations of super-obese (BMI > 50) and morbidly obese (BMI 40-50) patients.

Copyright 2005 Professor Rudolf Weiner, MD
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