Acute appendicitis is one of the most frequent surgical emergencies in children. The diagnosis of this condition is still a challenge for small pre-school children, and, generally, for children, as the wrong diagnosis is 28-57% for children between 2-12 years old. Therefore, the ultrasonographic exam for suspected acute appendicitis at patient’s bed (POCUS) is a necessary and useful paraclinic exam for supporting the diagnosis. The procedure has established: the quality of use in the emergency department (ED) of POCUS by the pediatric emergency doctors; the performance of ultrasonografic exam (US) in acute appendicitis (AA); reduces associated costs for imaging studies by standardization diagnosis of acute appendicitis through ultrasonographic examination. The ultrasonographic exam can be useful in evaluating children with suspected acute appendicitis and should be first choice for imaging examination. Also, it can reduce the use of CT scan and exposure to radiation, and the annual cost for imaging exams