Pharmacokinetics of Ketamine in Infants and Children

Open label pharmacokinetic study to be conducted in infants and children presenting for medical procedures (eg., surgery or cardiac catheterization). After the start of the procedure, a 0.5 cc preload blood sample (T0) will be drawn from an IV line. Then a 2 mg/kg IV bolus of Ketamine will be administered over 5 minutes. Timed 0.5 ml blood samples will be drawn at the following intervals: 5, 10, 15, 20, 30, 45, 60, 120, 180, 240, 300, 360 and 720 minutes after bolus.