Effects of a Dexmedetomidine on Quality of Recovery 40 and Postoperative Nausea and Vomiting in Breast Cancer Surgery

This study was approved by the Institutional Review Board of Severance Hospital, Yonsei University Health System. After written informed consent was obtained from all patients, aged 20-75 years with ASA physical status class I-II who were scheduled breast cancer surgery under general anaesthesia were enrolled in this study All the patients were randomly assigned to receive dexmedetomidine or placebo during surgery. The primary outcome was quality of recovery determined by QOR-40 in the first 24h after surgery.The secondary outcome measure was PONV assessed by visual analogue scale every 6 hours within 48 postoperative hours.