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Bao, Rui; Zhang, Wei-shi; Zha, Yi-feng; Zhao, Zhen-zhen; Huang, Jie; Li, Jia-lin; Wang, Tong; Guo, Yu; Bian, Jin-jun; Wang, Jia-feng
BMJ open, 03/2024, Volume: 14, Issue: 3Journal Article
ObjectivesOpioid-free anaesthesia (OFA) has emerged as a promising approach for mitigating the adverse effects associated with opioids. The objective of this study was to evaluate the impact of OFA on postoperative nausea and vomiting (PONV) following video-assisted thoracic surgery.DesignSingle-centre randomised controlled trial.SettingTertiary hospital in Shanghai, China.ParticipantsPatients undergoing video-assisted thoracic surgery were recruited from September 2021 to June 2022.InterventionPatients were randomly allocated to OFA or traditional general anaesthesia with a 1:1 allocation ratio.Primary and secondary outcome measuresThe primary outcome measure was the incidence of PONV within 48 hours post-surgery, and the secondary outcomes included PONV severity, postoperative pain, haemodynamic changes during anaesthesia, and length of stay (LOS) in the recovery ward and hospital.ResultsA total of 86 and 88 patients were included in the OFA and control groups, respectively. Two patients were excluded because of severe adverse events including extreme bradycardia and epilepsy-like convulsion. The incidence and severity of PONV did not significantly differ between the two groups (29 patients (33.0%) in the control group and 22 patients (25.6%) in the OFA group; relative risk 0.78, 95% CI 0.49 to 1.23; p=0.285). Notably, the OFA approach used was associated with an increase in heart rate (89±17 vs 77±15 beats/min, t-test: p<0.001; U test: p<0.001) and diastolic blood pressure (87±17 vs 80±13 mm Hg, t-test: p=0.003; U test: p=0.004) after trachea intubation. Conversely, the control group exhibited more median hypotensive events per patient (mean 0.5±0.8 vs 1.0±2.0, t-test: p=0.02; median 0 (0–4) vs 0 (0–15), U test: p=0.02) during surgery. Postoperative pain scores, and LOS in the recovery ward and hospital did not significantly differ between the two groups.ConclusionsOur study findings suggest that the implementation of OFA does not effectively reduce the incidence of PONV following thoracic surgery when compared with traditional total intravenous anaesthesia. The opioid-free strategy used in our study may be associated with severe adverse cardiovascular events.Trial registration numberChiCTR2100050738.
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