Effect of addition of different additives: Magnesium sulfate and dexamethasone versus plain bupivacaine in ultrasound-guided erector spinae plane block in pediatrics undergoing repair of inguinal hernia

Background Erector spinae plane (ESP) block has been evaluated in many studies in pediatric surgeries by the use of postoperative rescue analgesia which is the objective parameter assessing the efficacy of the technique in controlling postoperative pain. Adjuvants were used with ESP block to densify its postoperative analgesia. Magnesium sulfate was used for suppressing somatic, endocrine and autonomic reflexes induced by noxious stimuli during surgery. Dexamethasone is a highly potent glucocorticoid that has been used in different regional anesthesia to prolong the anesthetic effect of the local anesthesia by inducing local vasoconstriction.