Abstract
To evaluate the sensitivity, specificity, negative predictive value (NPV), and positive predictive value (PPV) of ultrasonography (US) findings for the diagnosis of pediatric appendicitis, we retrospectively reviewed data obtained in 261 consecutive patients with suspected appendicitis. US examinations were performed in 222 patients (85%): 131 patients underwent examinations performed by abdominal US technicians (TE group), and 91 patients underwent examinations performed by emergency room residents (ER group). The sensitivity and NPV of the TE group were higher than those of the ER group (sensitivity, 91% versus 68%; NPV, 86% versus 35%). The ER group, however, had a higher specificity and PPV than the TE group (specificity, 87% versus 56%; PPV, 96% versus 69%). We concluded that US is a valuable tool for the diagnosis of appendicitis, but that clinical examinations remain essential for an accurate diagnosis. Furthermore, the level of technical experience of the operator influences the interpretation of US findings and the diagnostic accuracy in patients with appendicitis.
