Based on the calculation above, 63 children are needed in each group to have an 80% chance of detecting a clinically meaningful difference in total sedation time of 10 minutes between the groups, assuming an alpha of 0.05, and a standard deviation of 20 minutes. We have added an additional 7 patients (10%) to each group to account for potential drop-outs. Written, informed consent will be obtained from a parent/guardian for all children that meet the study inclusion criteria. Additionally, all children over the age of eight will also be asked for their assent.