ObjectiveTo estimate whether a continuous infusion of intraperitoneal local anaesthetic for 48hours following laparoscopic hysterectomy reduced the need for opioids delivered with a patient-controlled analgesia pump.DesignDouble-blind randomised placebo-controlled trial.SettingDistrict general hospital in the UK.PopulationWomen undergoing a laparoscopic hysterectomy for a benign indication.MethodsWomen were randomised to receive either 0.5% levobupivicaine or 0.9% normal saline via an ON-Q elastomeric pump for 48hours postoperatively. The amount of opioids used via the patient-controlled analgesia pump was recorded and pain was measured using an 11-point Box Scale.Main outcome measuresThe primary outcome was the amount of patient-administered morphine used over the first 48 postoperative hours. Secondary outcomes were length of hospital stay, oral analgesia use and level of patient-reported pain.ResultsSixty women participated and completed the trial. There was no difference (P=0.59) in the median amount of patient-administered morphine used between the levobupivicaine (23mg) and placebo (18.5mg) groups; median group difference 3.0 (95% CI -7.0 to 14.0). There was also no difference in the length of hospital stay with 40% of the treatment group remaining in hospital >48hours compared with 30% of the placebo group (P=0.08). Pain scores at all postoperative time points remained similar, with a median group difference in pain scores of 1.0 (95% CI -1.0 to 2.0) at the end of the first postoperative day.ConclusionsContinuous infusion of 0.5% levobupivicaine into the peritoneal cavity following laparoscopic hysterectomy does not have any opioid-sparing effects.