title: Evidence-based German guidelines for surgery for obesity.
abstract: BACKGROUND
  The young field of obesity surgery (bariatric surgery) in Germany expands as a consequence of the rapid increase of overweight and obesity. New surgical methods, minimal access techniques, and the enormous increase of scientific studies and evidence, all contribute to the success of bariatric surgery, which is the only realistic chance of permanent weight loss and regression of secondary diseases in many cases.
  
  
  METHODS
  A systematic literature review, classification of evidence, graded recommendations, and interdisciplinary consensus.
  
  
  RESULTS
  Obesity surgery is an integral component of the multimodal treatment of obesity, which consists of multidisciplinary evaluation and preparation, conservative and surgical treatment elements, and a life-long follow-up. The guideline confirms the body mass index (BMI)-based spectrum of indications (BMI > 40 kg/m(2) or >35 kg/m(2) with secondary diseases) and extends it through elimination of all age restrictions (>18 years and <60 years) and most of the contraindications. Precondition for surgery is the failure of a structured conservative program of 6-12 months or the expected futility of it. Type II diabetes mellitus becomes an independent indication criterion for BMI < 35 kg/m(2) (metabolic surgery). The standard techniques are gastric balloon, gastric banding, gastric bypass, gastric sleeve, and biliopancreatic diversion. The choice of procedure is based on profound knowledge of results, long-term effects, complications, and patient-specific circumstances. The after-care should be structured and organized long term.
  
  
  CONCLUSIONS
  The S3-guidelines contain evidence-based recommendations for the indication, selection of procedure, technique, and follow-up. Patient care should improve after implementation of these guidelines in clinical practice. Compliance by decision makers and health insurers is warranted.
authors.affiliation: Deutsche Gesellschaft für Allgemein- und Viseralchirurgie, Klinik für Allgemein-, Visceral- und Kinderchirurgie, Vöhrenbacherstr. 15, 78050 Villingen-Schwenningen, Germany. avc@sbk-vs.de
authors.forename: Norbert
authors.initials: N
authors.lastname: Runkel
authors.forename: Mario
authors.initials: M
authors.lastname: Colombo-Benkmann
authors.forename: Thomas P
authors.initials: TP
authors.lastname: Hüttl
authors.forename: Harald
authors.initials: H
authors.lastname: Tigges
authors.forename: Oliver
authors.initials: O
authors.lastname: Mann
authors.forename: Ricarda
authors.initials: R
authors.lastname: Flade-Kuthe
authors.forename: Edvard
authors.initials: E
authors.lastname: Shang
authors.forename: Martin
authors.initials: M
authors.lastname: Susewind
authors.forename: Stefani
authors.initials: S
authors.lastname: Wolff
authors.forename: Ricarda
authors.initials: R
authors.lastname: Wunder
authors.forename: Alfred
authors.initials: A
authors.lastname: Wirth
authors.forename: Klaus
authors.initials: K
authors.lastname: Winckler
authors.forename: Arved
authors.initials: A
authors.lastname: Weimann
authors.forename: Martina
authors.initials: M
authors.lastname: de Zwaan
authors.forename: Stefan
authors.initials: S
authors.lastname: Sauerland
mesh_terms: D050110:Bariatric Surgery; D019317:Evidence-Based Medicine; D005858:Germany; D006801:Humans; D009765:Obesity / Q000601:surgery*; D011182:Postoperative Care; D013997:Time Factors