1. AWMF (2009) S3-Leitlinie Behandlung akuter perioperativer und posttraumatischer Schmerzen. http://www.leitlinien.net
2. Jorgensen H, Wetterslev J, Moiniche S, Dahl JB (2000) Epidural local anaesthetics versus opioid-based analgesic regimens on postoperative gastrointestinal paralysis, PONV and pain after abdominal surgery. Cochrane Database Syst Rev 4:CD001893
3. Rigg JRA, Jamrozik K, Myles PS et al (2002) Epidural anaesthesia and analgesia and outcome of major surgery: a randomised trial. Lancet 359:1276–1282
4. AWMF (2007) Rückenmarknahe Regionalanästhesien und thromboembolieprophylaxe/antithrombotische Medikation. Anästh Intensivmedizin 48:109–124, http://www.leitlinien.net
5. Capdevila X, Barthelet Y, Biboulet P et al (1999) Effects of perioperative analgesic technique on the surgical outcome and duration of rehabilitation after major knee surgery. Anesthesiology 91:8–15