• Knut J Olanders, Gerd A E Lundgren, and Anders M G Johansson.
• Department of Intensive- and Perioperative Care, Lund University Hospital, S-221 85 Lund, Sweden. Electronic address: knut.olanders@skane.se.
• J Clin Anesth. 2014 Sep 1;26(6):461-5.

Study ObjectiveTo investigate whether betamethasone decreases the incidence of postoperative nausea/vomiting (PONV) and reduces postoperative pain following partial mastectomy.DesignProspective randomized, double-blinded study.SettingOperating room and Postanesthesia Care Unit of a university hospital.Patients80 ASA physical status 1 and 2 women scheduled for elective breast cancer surgery.InterventionsPatients were randomly allocated to two groups in double-blinded fashion: Group B (betamethasone; 37 pts) and Group C (control; 38 pts). Group B received 8 mg of betamethasone intravenously before the start of surgery.MeasurementsThe rate of PONV and pain were recorded using a numeric rating scale (NRS; 0-10), as well as rescue doses of antiemetics (ondansetron) and analgesics (ketobemidone).Main ResultsThere was a significant lower incidence of postoperative nausea (PON) scoring NRS ≥ 1 in Group B in the 4 to 12-hour period compared with Group C (P = 0.02). The cumulative incidence of PON was 57% in Group B versus 68% in Group C (P = 0.27). The overall incidence of postoperative vomiting (POV) was 18% and 20% in Groups B and C, respectively. Postoperative pain was reduced by 40% in Group B in the 4 to 12-hour period, but the mean dose of postoperative rescue analgesic did not differ between the groups.ConclusionsPreoperative betamethasone reduces the severity of PONV and pain in patients undergoing elective breast surgery.Copyright © 2014 Elsevier Inc. All rights reserved.

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