EASY Algorithm Trial (Elbow Trauma Assessment Using Sonography in Children and Youth) Diagnostic Accuracy and Safety of Point-of-care Ultrasound as a Screening Tool for Suspected Elbow Fractures in Children Aged 5 to 15 Years: a Multicenter Prospective Cohort Study

The goal of this observational study is to learn about the safety and accuracy of ultrasound as a screening tool to detect broken bones (fractures) in the elbow area in children and youth aged 5 to 15 years. The main question it aims to answer is: \- Can ultrasound reliably show that there is a fracture in the elbow area after an accident? Participants will: * Have an ultrasound of their elbow to look for fluid in the joint. * Have standard X-rays of their elbow to check if there is a fracture. * Have their medical records checked and answer a phone call 6 weeks later to see how their elbow has healed (only if no fracture was found during the first visit).