You are a nursing student rotating in the ED. This is the first day of your rotation. The first case is a 34-year-old male complaining of lower abdominal pain, nausea and vomiting. The team suspects appendicitis and asks you as the new student which is the better diagnostic tool – a scan or an ultrasound? You are overcome with a feeling of uncertainty and a strong urge to review the literature and find some impressive evidence to bring back to your preceptor.