It is very well established the importance of early diagnostic of hearing loss. Everybody speaks about neonatal screening, but just a few people comment about the children who not passed on screening. The auditory brainstem response (ABR) is the next step of the diagnostic. The aim of this paper is evaluate the ABRs from children who not passed on screening, looking for the threshold and the latency of the five wave. STUDY DESIGN: Clinical prospective. MATERIAL AND METHOD: 75 ABR were analyzed. RESULTS: A great number of exams was normal. The most frequently alteration was the increase of the latency of the wave V that can be explained for the incomplete mielinization from the auditory pathway, otitis media or retrococlear alterations. CONCLUSIONS: We concluded that the increase of the latency of the V wave is the mainly alteration on ABRs.
neonatal screening; brain auditory; V wave
