title: Weight Loss Analysis According to Different Formulas after Sleeve Gastrectomy With or Without Antral Preservation: a Randomised Study.
abstract: The measurement of weight loss after bariatric surgery is under constant review in order to obtain the ideal standard for reporting weight loss. Several formulas have been proposed for this purpose. Our goal is to analyse weight loss after sleeve gastrectomy, with or without antrum preservation through different measurement formulas.
  
  
  
  A prospective randomised study of 60 patients (30 patients with initial section at 3 cm from pylorus and 30 patients at 8 cm from the pylorus). We calculate the following variables at 3, 6 and 12 months from surgery: BMI, excess weight loss (%EWL), percentage of excess of BMI loss (%PEBMIL), expected BMI, % PEBMIL corrected by EBMI and percentage of total weight loss (%TWL).
  
  
  
  Weight evolution is similar in both groups, reaching a mean BMI of 33.62 ± 4.35 and 34.48 ± 4.23 kg/m2respectively 12 months after surgery, closer to expected BMI. TWL follows the same trend, with losses exceeding 30%, although 3 cm group is above the tables of percentiles made with our series. Regarding PEBMIL, the 3 cm group reaches 67.8% classified as excellent, while 8 cm group reaches 62.8% classified as a good result. EWL situates the best results for 3 cm group.
  
  
  
  Group 3 cm obtained a lower percentage of suboptimal results using EWL. %TWL places the 3 cm group in higher percentile than 8 cm group. Through EBMI, both groups are equally effective. It is necessary to have standardised dynamic tables for each surgical technique, becoming essential elements to measure weight loss after surgery.
authors.affiliation: Surgery Service of Sant Joan University Hospital, Faculty of Medicine and Health Sciences, IISPV, Rovira i Virgili University, Reus, Tarragona, Spain.
authors.forename: Fàtima
authors.initials: F
authors.lastname: Sabench Pereferrer
authors.affiliation: Surgery Service of Sant Joan University Hospital, Faculty of Medicine and Health Sciences, IISPV, Rovira i Virgili University, Reus, Tarragona, Spain.
authors.forename: Alicia
authors.initials: A
authors.lastname: Molina López
authors.affiliation: Surgery Service of Sant Joan University Hospital, Faculty of Medicine and Health Sciences, IISPV, Rovira i Virgili University, Reus, Tarragona, Spain.
authors.forename: Margarida
authors.initials: M
authors.lastname: Vives Espelta
authors.affiliation: Surgery Service of Sant Joan University Hospital, Faculty of Medicine and Health Sciences, IISPV, Rovira i Virgili University, Reus, Tarragona, Spain.
authors.forename: Esther
authors.initials: E
authors.lastname: Raga Carceller
authors.affiliation: Surgery Service of Sant Joan University Hospital, Faculty of Medicine and Health Sciences, IISPV, Rovira i Virgili University, Reus, Tarragona, Spain.
authors.forename: Santiago
authors.initials: S
authors.lastname: Blanco Blasco
authors.affiliation: Surgery Service of Sant Joan University Hospital, Faculty of Medicine and Health Sciences, IISPV, Rovira i Virgili University, Reus, Tarragona, Spain.
authors.forename: Francisco
authors.initials: F
authors.lastname: Buils Vilalta
authors.affiliation: Surgery Service of Sant Joan University Hospital, Faculty of Medicine and Health Sciences, IISPV, Rovira i Virgili University, Reus, Tarragona, Spain.
authors.forename: Marta
authors.initials: M
authors.lastname: París Sans
authors.affiliation: Surgery Service of Sant Joan University Hospital, Faculty of Medicine and Health Sciences, IISPV, Rovira i Virgili University, Reus, Tarragona, Spain.
authors.forename: Maria Luisa
authors.initials: ML
authors.lastname: Piñana Campón
authors.affiliation: Surgery Service of Sant Joan University Hospital, Faculty of Medicine and Health Sciences, IISPV, Rovira i Virgili University, Reus, Tarragona, Spain.
authors.forename: Mercè
authors.initials: M
authors.lastname: Hernández González
authors.affiliation: Surgery Service of Sant Joan University Hospital, Faculty of Medicine and Health Sciences, IISPV, Rovira i Virgili University, Reus, Tarragona, Spain.
authors.forename: Antonio
authors.initials: A
authors.lastname: Sánchez Marín
authors.affiliation: Surgery Service of Sant Joan University Hospital, Faculty of Medicine and Health Sciences, IISPV, Rovira i Virgili University, Reus, Tarragona, Spain. ddelcastillo@grupsagessa.com.
authors.forename: Daniel
authors.initials: D
authors.lastname: Del Castillo Déjardin
mesh_terms: D000328:Adult; D015992:Body Mass Index; D005260:Female; D005743:Gastrectomy / Q000379:methods*; D006801:Humans; D010535:Laparoscopy; D008297:Male; D008875:Middle Aged; D009767:Obesity, Morbid / Q000601:surgery*; D011446:Prospective Studies; D011706:Pyloric Antrum / Q000601:surgery*; D015431:Weight Loss
keywords: Pylorus; Sleeve gastrectomy; Weight results