Variables of interest will include level of sedation prior to and during the procedure (using an activity scale and a modified CHEOPS scale) (McGrath 1985), time to adequate sedation, procedure length, length of ED stay, parental, MD, and RN satisfaction using a Likert scale, and complications such as respiratory depression and vomiting as well as measures needs to ameliorate those complications. For adequate power, we anticipate enrolling 180 patients (60 in each treatment group) during the 24-month duration of the study.