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Jejunoileal and common limb length vary widely in gastric bypass patients. To make modifications in the alimentary and/or biliopancreatic limb length, surgeons must consider the variability of the jejunoileal and common limb length.

The results of this study are similar to few other investigations and confirm that RML in open bariatric surgery with RYGBP (Capella) is a common complication. A longer surgical time can be involved in RML pathogenesis, and muscular pain is suggestive of RML occurrence.

The significant increase in mannitol excretion rate from T1 to T6 most likely reflects the occurrence of intestinal adaptation (mucosal hyperplasia), which would tend to minimize the malabsorption of macronutrients. A subgroup of patients who undergo RYGB exhibit pronounced increase in their intestinal permeability (assessed by the lactulose/mannitol ratio and the lactulose excretion rate) at T6.

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