Ultrasound-guided continuous erector spinae plane block versus thoracic epidural analgesia in open nephrectomy for renal malignancy: a randomized controlled study

Background & objective: Pain during nephrectomy has been reported to be extremely intense and may trigger complex biochemical and physiological stress response if managed inadequately. Erector spinae plane block (ESPB) and thoracic epidural analgesia (TEA) both have been advocated for pain management in adult patients undergoing open nephrectomy under general anesthesia. We compared the efficacy and the dynamics of both of these procedures. Methodology: This was a randomized, double-blinded, controlled trial involving 54 patients were undergoing open nephrectomy for malignant kidney tumors. All patients were ASA class II, had a BMI 20-40 kg/m(2), and were between the ages of 18-65 y. Through random assignment, people were divided into two identical, equivalent groups: Group A (n = 27) received TEA, whereas Group B (n = 27) received US-guided continuous ESPB. Mean arterial pressure (MAP) and intraoperative heart rate (HR) were recorded before and after incision, and at 30 min, 1 h, and 1.5 h. Postoperative HR, MAP were recorded at 6 h and 12 h, both at rest and when moving. Numerical rating scale (NRS) score was used to compare the intensity of postoperative pain. Results: Postoperative HR, MAP, at 6 h and 12 h, at rest and when moving, were substantially reduced in the TEA group than those in the ESPB group. The NRS score of the ESPB group was substantially greater than that of the TEA group. In contrast to the TEA group, much more total amount of morphine was consumed in the ESPB group. The time to first rescue analgesia was substantially shorter in ESPB group than that of the TEA group. Conclusions: The results of our study prove that US guided erector spinae plane block is effective in providing postoperative analgesia, decreasing use of intraoperative and postoperative opioids in patients having open nephrectomy. However, it is still inferior to thoracic epidural analgesia in terms of pain control after 6 h postoperatively. Otherwise, erector spinae plane block has fewer side effects compared to thoracic epidural analgesia. So, it may be used as an alternative to thoracic epidural analgesia