This procedure is performed in the operating room with the patient asleep (general anesthetic).
In young children, the child is allowed to breathe anesthetic gas out of a mask until they fall asleep (this usually takes less than 30 seconds), then an IV catheter is placed and a breathing tube is placed in the throat. Some sedation is sometimes given prior to going to the operating room if the child has a lot of anxiety or will not easily separate from the parents.
In older children, the IV catheter may be placed prior to the child going to sleep at the discretion of the anesthesiologist. A member of the anesthesia department administers all anesthetics, and all of the routine monitoring equipment is used to assure safety.