Granisetron and incidence of shivering in children after spinal anesthesia

INTERVENTION: Effect of Premedication with Granisetron on incidence of shivering during spinal anesthesia in children intravenous 10 mcg/Kg granisetron diluted in 10 ml saline 0.9% to be given over 5 minutes just before spinal puncture. Spinal block was done by intrathecal hyperbaric bupivacine 0.5% (0.5 mg/Kg). CONDITION: shivering during spinal anesthesia in children PRIMARY OUTCOME: Incidence of shivering ; Shivering was assessed using scale of Tsai and Chu. ; 0 no shivering ; 1 Mild fasciculations of face or neck ; 2 Visible tremor involving more than one muscle group ; 3 Gross muscular activity involving the entire body SECONDARY OUTCOME: Motor block was assessed using the Bromage scale recording the ability to flex hip, knee and ankle. Sensory block was assessed by bilateral pin prick at each dermatome to elicit grimace or acknowledgement of pain. INCLUSION CRITERIA: 80 children ASA 1 and 2 scheduled for lower limb surgery under spinal anaesthesia were entered into study