Database Syst Rev. 2014;8(8): CD003641. doi: 10.1002/ 14651858.CD003641.pub4.2. Schauer PR, Kashyap SR, Wolski K, et al. Bariatric surgery versus intensive medical therapy in obese patients with diabetes. N Engl J Med 2012; 366(17):1567- 76.3. Sjöström L, Lindroos AK, Peltonen M, Torgerson J, Bouchard C, Carlsson B, Dahlgren S, Larsson B, Narbro K, Sjöström CD, Sullivan M, Wedel H, Swedish Obese Subjects Study Scientific Group, Lifestyle, diabetes, and cardiovascular risk factors 10 years after bariatric surgery. N Engl J Med 2004; 351:2683-2693.4. Saeidi N, Meoli L, Nestoridi E, Gupta NK, Kvas S, Kucharczyk J, Bonab AA, Fischman AJ, Yarmush ML, Stylopoulos N. Reprogramming of Intestinal Glucose Metabolism and Glycemic Control in Rats After Gastric Bypass. Science 2013; 341(6144):406-410.5. Tappy L, Lê KA. (2010). Metabolic effects of fructose and the worldwide increase in obesity. Physiological reviews, 1, 23-46.6. Litherland GJ, Hajduch E, Gould GW, Hundal HS. (2004). Fructose transport and metabolism in adipose tissue of Zucker rats: diminished GLUT5 activity during obesity and insulin resistance. Molecular and cellular biochemistry, 1-2, 23-33. A5014 HEART RATE PATTERNS AND PREDICTION OF POSTOPERATIVE COMPLICATIONS DURING THE FIRST 48 HOURS AFTER BARIATRIC SURGERY Carlos Zerrweck 1 ; Miguel Alejandro Solís Vazquez 2 ; Ricardo Berrones 2 ; Eva Ramírez 2 ; Monica Amado 2 ; Lizbeth Guilbert 2 ; Elisa Sepúlveda 2 ; Hernán Maydón 2,3 ; 1 ABC Medical Center, Mexico City; 2 Hospital General Tláhuac, Ciudad de Mexico. DF Ciudad de Mexico, DF; 3 Tlalpan Mexico City Background: Complications after bariatric surgery have been described around 9-19% and mortality rate shouldn't exceed 1%, with an 'acceptable' rate of 0.1-0.5%. Early detection and correct treatment of potentially catastrophic complications continues to be the milestone in these types of surgeries. In patients with obesity, symptoms related to abdominal complications can pass undiagnosed, but variations in vital signs (e.g. heart rate, blood pressure and oxygenation) could be the first manifestation of severe complications. Methods: A prospective study was performed with every patient submitted to bariatric surgery at a single institution from October 2012 to march 2015. A record of their vital signs (heart rate, blood pressure, oxygen saturation and temperature), postoperative fluid balance (urine and drain output) and postoperative pain (Visual Analog Scale) were performed (before surgery, 6-10, 24 and 48 hours after surgery). A record of complications occurring during the first 48 hours was also performed. The primary objective was to determinate early variations in heart rate for those patients presenting further complications within the first 48 hours after surgery. Secondarily an analysis of other vital signs, fluids output and pain was performed to stablished their relation with complications and heart rate. Inclusion criteria were: Patients submitted to Laparoscopic Gastric Bypass and Sleeve gastrectomy with complete data collection sheets. Exclusion criteria were patients with incomplete charts, revisional surgery, open surgery or converted to open, usage of beta-blockers for hypertension, usage of dexmede- tomidine during anesthesia, patients with any arrhythmia and/or taking diltiazem, verapamil or inotropics. Results: In a 29 months period, 291 patients were submitted to bariatric surgery. Nineteen were excluded because incomplete charts or dexmedetomidine use, and 13 because were taking beta-blockers. The final analysis was performed in 259 patients (79.9% female sex with a median age of 39 years) presenting an initial mean BMI of 40.3 kg/m 2 . The rest of the initial demographic characteristics can be observed in Table 1. There were 26 complications (10%) during the first month, but only 10 (3.8%) occurred during the first 48 hours. Seven presented bleeding (5 with gastrointestinal bleeding being evident 24 hours after the procedure and 2 with postoperative surgical bleeding) and 3 atelectasis. Baseline analysis of vital signs for patients Posters of Distinction / Surgery for Obesity and Related Diseases 12 (2016) S56–S75 S65