Dexmedetomidine vs. Ketorolac/ Midazolam for Retinal Surgery

Patients received 1ug/kg dexmedetomidine in 50 ml saline over 10 min i.v 30 min before induction then 0.4 ug/kg/h dexmedetomidine (4ug/ml) and normal saline 0.1 ml/kg till end of surgery, using two syringe pumps one for dexmedetomidine and the other for saline

Patients received 0.5mg/kg ketolac in 50 ml saline over 10 min before induction and 25ug/kg midazolam in 50 ml saline over 10 min i.v 30 min before induction then 50ug/kg/h of ketolac and 40ug/kg/h midazolam till end of surgery in two separate syringe pumps.

Patients received normal saline in two sets