When it is time for the procedure, you will head to the procedure room. Adults will receive an IV catheter while awake, and medication placed in this IV will allow you to drift off to sleep. (Children will breathe gas through a mask until they are asleep, and then the IV catheter will be placed. Please do not tell your child about the IV in advance, as this causes undue fear and stress.) The anesthesiologist will remain with you and monitor your heart rate and rhythm, blood pressure, oxygenation, and other parameters to ensure adequate sedation and safety.