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Updated: Nov 25, 2025

A Protocol for Roux-en-Y Gastric Bypass in Rats using Linear Staplers
Published on: August 21, 2021
[Weight gain after bariatric surgery]
M M Romeijn1,2, M Uittenbogaart1, L Janssen1
1Máxima Medisch Centrum, afd. Chirurgie, Eindhoven/Veldhoven.
Abstract:
Despite the frequent success of bariatric surgery, 20-30% of patients do not respond well. These patients may experience insufficient weight loss, defined as primary non-response, or may regain an excessive amount of weight after sufficient weight loss, defined as secondary non-response. The aetiology and subsequent treatment of these two types of non-response may differ. This is illustrated by three cases: a patient with primary non-response after gastric bypass (total weight loss 18%) treated conservatively; a patient with secondary non-response after gastric bypass (total weight loss 27%) treated conservatively and lost 7kg as a result of this therapy; a patient with secondary non-response after gastric bypass (total weight loss 27%) treated surgically though experienced malabsorptive complaints as result of distalisation. These cases can be used to demonstrate the challenges that are faced by professionals in the current treatment of post-bariatric surgery patients.
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