Eighty-nine children scheduled for elective inguinal hernia repair or hydrocele were randomly assigned to one of the three groups : Group L ( caudal levobupivacaine ) , Group LD1 ( levobupivacaine plus 1gkg ( -1 ) dexmedetomidine ) , or Group LD2 ( levobupivacaine plus 2gkg ( -1 ) dexmedetomidine ) .