title: Laparoscopic single-incision gastric bypass: initial experience, technique and short-term outcomes.
abstract: BACKGROUND
  Single incision laparoscopic surgery (SILS) research has been limited. The aim of this study is to describe our technique and to evaluate the short term outcomes and efficacy of SILS Roux-en-Y gastric bypass (RYGB) in a selected group of patients in a single center.
  
  
  METHODS
  From March 2012 to January 2013, a total of fourteen patients underwent SILS RYGB using a single vertical 2.5-3 cm intra-umbilical incision, 3-ports placed trans-fascially, and a liver suspension technique in Cleveland Clinic's Bariatric & Metabolic Institute, in Cleveland, Ohio, USA. Patient selection, short-term outcomes and technical issues were retrospectively viewed in this study.
  
  
  RESULTS
  A total of 14 morbid obese patients (12 women and 2 men; mean age, 46 years). Mean operative time was 196 (range 131-265) min. Mean weight at surgery was 113 (range 91-135) kg. One patient required placement of one additional port (7 %). No conversions to conventional laparoscopic surgery (CLS) or open surgery was needed. The estimated blood loss was 40 (range 20-100) ml. In terms of pain control, the frequency of patient controlled analgesia had a mean use of 21 times in postoperative day 0 (POD), 37 times in POD1 and 13 times in POD2. Pain score (assessed by visual analogue scale) had a median score of 6.9 in POD0, 5.2 In POD1 and 3.8 in POD2. Weight loss was approximately 7.25 lb. (±4.5) after first postoperative visit, 28.9 lb. (±11.86) after 1 month and 45.4 lb. (±15.4) after 4 months. No patients required re-operation or readmission during the 90 days after surgery.
  
  
  CONCLUSIONS
  Single incision is feasible, safe and reproducible technique used as an access to complex surgeries like gastric bypass in carefully selected patients. Results in short-term outcomes are comparable to those observed in literature. Some potential benefits include less postoperative pain, improved cosmesis, and patient satisfaction. Randomized trials involving larger patient series with a longer follow-up and larger cohort studies and/or systematic reviews will be necessary to assess the extent of the benefits and limitations of SILS in bariatric surgery.
authors.affiliation: Hospital de Clinicas de Porto Alegre, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil.
authors.forename: Ivan Alberto
authors.initials: IA
authors.lastname: Zepeda Mejia
authors.affiliation: Cleveland Clinic, Bariatric and Metabolic Institute, 9500 Euclid Ave, M66-06, Cleveland, OH 44118 USA.
authors.forename: Tomasz
authors.initials: T
authors.lastname: Rogula
keywords: Bariatric surgery; Cosmesis; Morbid obesity; Post-operative Pain; Single incision gastric bypass; Single incision laparoscopic surgery