الفهرس 
Comparing the analgesic efficacy of two different doses of dexmedetomidine as adjuvant to bupivacaine for pediatric patients undergoing supra-umbilical abdominal surgeries using caudal block randomized control trial
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Abstract
Local anesthetics are commonly used for caudal analgesia, but the major problem is the relatively short duration of action, thus early analgesic intervention is needed in the postoperative period. A number of adjuvants, such as clonidine and dexmedetomidine, and others have been studied to prolong the effect of caudal analgesia [1, 2]. Dexmedetomidine, a centrally acting Ü2-adrenergic agonist, has similar physiologic properties to clonidine. In this study, we compared the effectiveness between two different doses of dexmedetomedine and bupivacain versus bupivacain alone in supra-umbilical pediastric surgeries. Thirty-six patients aged from 1year till 6 years old will be randomly allocated into three groups: group A: will receive caudal bupivacaine 0.25%, 2 mg/kg (1ml/kg) and dexmedetomidine 0.5 og/kg