Ultrasound Guided IV Access in a Pediatric Emergency Department

The primary objective is to determine whether the use of ultrasound guidance compared to standard IV access improves the proportion of successful IV placement on a first attempt for children in a pediatric emergency department who have predicted difficult access by a validated score. Secondary objectives include determining whether ultrasound-guided IV access lowers the overall number of IV attempts and/or reduces time to IV access. The investigators will also examine the duration of IV access and any complications related to IV access in both the traditional and ultrasound guided IV access group.