Comparison of the Efficacy of Ketamine in Pediatric Patients With Idiopathic Scoliosis After Surgery

50 mg/ml, IV (in the vein) during surgery operation, followed by IV ketamine hydrocloride perfusion 2mcg/Kg/min before and until 72 hours after operation Number of Cycles: until progression or unacceptable toxicity develops.

50 mg/ml, IV (in the vein) during surgery operation, followed by IV placebo perfusion 2mcg/Kg/min before and until 72 hours after operation

at doses of 0.3 mcg / kg / min during and until the end of the surgical operation

at the dose of 150 mcg / kg, 60 minutes before the extubation procedure and until 72 hours after operation by intravenous infusion