Studies have demonstrated a wide range in the accuracy of ultrasound for appendicitis. Sensitivities and specificities vary and no standardized diagnostic criterion exist. Additionally, little has been published directly studying EP point of care ultrasound in the evaluation for acute appendicitis. One study has shown that EP-performed ultrasounds had a relatively low sensitivity, but a high specificity. However, this study was performed by a wide range of users with varying skill levels and older ultrasound machines. The surgical literature suggests that the ability of the clinician to integrate the history, the physical exam and the ultrasound findings in real time improves the diagnostic accuracy of ultrasound for appendicitis.