Pain control following open renal surgeries are of utmost importance in order to reduce the chance of chronic pain development, and facilitate early rehabilitation. The erector spinae plane block (ESPB) is a recently developed regional anaesthesia procedure successfully used for different types of surgical procedures including open renal surgeries. A Comparative cross-sectional study design will be used and patients fulfilling the inclusion criteria will be included that are admitted through the Outpatient department. Patients will be optimized for surgery. A detailed history will be taken regarding the mode of injury, any preexisting disease and previous surgery and finally thorough examination of the patient will be done to rule out any systemic disease. Informed consent will be taken. These patients will be divided into 2 groups by simple lottery method in group A and B.All the data collected will be entered and analyzed by SPSS version 25.0. Age, surgery d.uration, intraoperative heart rate, intraoperative MAP, total postoperative opioid consumption, total intraoperative opiod and isoflurane consumption, time to first required analgesic, and VAS during the first postoperative 24 h will be summarized, according to normality, into mean (± standard deviation \[SD\]) or median (range). According to data normality, the hypothesis of significant differences between the two studied groups will be challenged using the one-way analysis of variance (with least significant difference correction) or Kruskal-Wallis tests (VAS). Moreover, a p value of \< 0.05 will be regarded to be statistically significant
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Post Op Analgesia
Timeframe: From performance of block to first rescue analgesia in 24 hours post operatively.