Patients randomly received intravenous dexmedetomidine 0.5 g/kg followed by epidural dexmedetomidine 0.5 g/kg alongwith 5 ml ; 0.25 % ropivacaine or intravenous fentanyl 1 g/kg followed by epiduralfentanyl 1 g/kg alongwith 5 ml ; 0.25 % ropivacaine .