Sedation of children prior to the surgery using nebulization of two doses of a same drug called dexmedetomidine to reduce parental separation anxiety.

Intervention1: Group B - 39 patients, 3 microgram/kg dexmedetomidine mixed in normal saline to make a total volume of 3 ml.: Group B will receive nebulisation with dexmedetomidine at a dose 3mcg/kg diluted with 0.9% normal saline to a total volume of 3 ml with a nebuliser face mask and a continuous flow of 100% oxygen at 6 L/min for 10 min once before induction of anaesthesia in sitting position. Control Intervention1: Group A - 39 patients, 2 microgram/kg of dexmedetomidine mixed in normal saline to a total volume of 3 ml.: Group A will receive nebulisation with dexmedetomidine at a dose 3mcg/kg diluted with 0.9% normal saline to a total volume of 3 ml with a nebuliser face mask and a continuous flow of 100% oxygen at 6 L/min for 10 min once before induction of anaesthesia in sitting position. Primary outcome(s): Parental seperation anxiety score and mask acceptance scoreTimepoint: 30 mins after beginning of nebulisation. Study Design: Randomized, Parallel Group Trial Method of generating randomization sequence:Computer generated randomization Method of allocation concealment:Sequentially numbered, sealed, opaque envelopes Blinding and masking:Participant Blinded