title: Common Limb Length Does Not Influence Weight Loss After Standard Laparoscopic Roux-En-Y Gastric Bypass.
abstract: Although Roux-en-Y gastric bypass (RYGBP) has proven its reliability over time in terms of weight loss and resolution of comorbidities, there continues to be a significant controversy in terms of used limb lengths. In the classical RYGBP, most surgeons have reported an alimentary limb length (ALL) of 100 to 150 cm and a bilio-pancreatic limb length (BPLL) of 50 to 75 cm. On the other hand, the common limb length (CLL) remains unknown in all the patients. As it is theoretically related to the level of malabsorption, CLL could influence weight loss after RYGBP.
  
  
  
  We performed a laparoscopic RYGBP in 90 patients with a mean preoperative body mass index (BMI) of 44.8. ALL and BPLL were respectively fixed at 150 and 75 cm. A systematic intraoperative measurement of CLL was performed.
  
  
  
  As expected, we found a great variation of the jejuno-ileal length and also of the CLL. We created three subgroups of patients: one with the entire population, one excluding the super-obese patients (BMI > 50) and the third one excluding the revisions. There was no statistically significant correlation between CLL and excess BMI loss (EBMIL) at 1, 3, 6 and 12 months of follow-up in each group. We also found a linear correlation between the jejuno-ileal length and the height of individuals.
  
  
  
  With a fixed 150-cm ALL and a 75-cm BPLL, there is no evidence that the anatomical variations of CLL could influence weight loss after classical RYGBP.
authors.affiliation: Oesogastroduodenal and Bariatric Unit, Department of Abdominal Surgery and Transplantation, Cliniques Universitaires Saint-Luc, 10 Avenue Hippocrate, 1200, Brussels, Belgium. benoit.navez@uclouvain.be.
authors.forename: Benoit
authors.initials: B
authors.lastname: Navez
authors.affiliation: Oesogastroduodenal and Bariatric Unit, Department of Abdominal Surgery and Transplantation, Cliniques Universitaires Saint-Luc, 10 Avenue Hippocrate, 1200, Brussels, Belgium.
authors.forename: Theodoros
authors.initials: T
authors.lastname: Thomopoulos
authors.affiliation: Oesogastroduodenal and Bariatric Unit, Department of Abdominal Surgery and Transplantation, Cliniques Universitaires Saint-Luc, 10 Avenue Hippocrate, 1200, Brussels, Belgium.
authors.forename: Irina
authors.initials: I
authors.lastname: Stefanescu
authors.affiliation: Oesogastroduodenal and Bariatric Unit, Department of Abdominal Surgery and Transplantation, Cliniques Universitaires Saint-Luc, 10 Avenue Hippocrate, 1200, Brussels, Belgium.
authors.forename: Laurent
authors.initials: L
authors.lastname: Coubeau
mesh_terms: D000713:Anastomosis, Roux-en-Y; D005260:Female; D015390:Gastric Bypass / Q000379:methods; D006801:Humans; D010535:Laparoscopy / Q000379:methods; D008297:Male; D008875:Middle Aged; D009767:Obesity, Morbid / Q000601:surgery*; D011184:Postoperative Period; D015203:Reproducibility of Results; D016896:Treatment Outcome; D015431:Weight Loss
keywords: Alimentary limb length; Biliopancreatic limb length; Common limb length; Excess weight loss; Malabsorption; Roux-en-Y laparoscopic gastric bypass