This article aims at describing the implementation and experimentation of TEDIS, an information system dedicated to patients with Pervasive Developmental Disorder. The experiment included 30 prospective patient records aged from 3.2 to 7.5 with an average of 6.3. Preliminary patient data analysis highlighted the need of improving the data collection process, by making relevant data systematically and accurately documented. Despite a small study ample size, data analysis also showed the interest of such information system in making evident improvements in patient care and resources allocation after medical and clinical expert assessment.