Thу goal of this study was to learn whether intraoperative analgesia nociception monitoring (ANI) could be beneficial during intraoperative monitoring for patients undergoing living donor liver resections. The main questions it aims to answer are: * Could it impact the average dose of intraoperative fentanyl used? * Could it impact the occurrence of postoperative nausea and vomiting? Patients who were included in this study underwent living liver donor resections with fentanyl infusion and thoracic epidural analgesia. Two groups of patients were analysed - the ANI group (n = 24), in which fentanyl dose was adjusted with ANI monitoring, and the retrospective control group (n = 25) with a standard practice without ANI monitoring.
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Postoperative Nausea and Vomiting
Timeframe: from enrollment to the first 48 hours postoperatively