Clinical assessment
PONV, postoperative nausea and vomiting, NRS
SECONDARY
Primary and secondary outcomes have been stated at the end of the Patients,, nurses assessing the NRS, and the statistician were blinded with regard to the anaesthetic technique used. The anaesthetists performing the block were not blinded: they were caring for the patients during the intervention and collected the intraoperative data but were not involved in postoperative PCA data collection and statistical analysis. The surgeons were not blinded but also not involved in postoperative evaluations and statistical analysis.There were some limitations in the clinical informatic system such as the inability to retrieve records about postoperative nausea and vomiting (PONV), the use of ketoprofen rescue doses, and the number of attempted doses of morphine with the PCA.