The Evaluation of Visual Evoked Potentials (VEPs) Test in Premature Infants

Authors : Erhan AKSOY

Pages : 410-415

View : 8 | Download : 5

Publication Date : 2019-12-10

Article Type : Conference Paper

Abstract :Objective: Visual functions are under-developed in premature infants, as the visual pathways plexus beginning from optic nerves and extending to the visual cortex are affected in parallel with the incomplete myelinization process. Visual Evoked Potential insert ignore into journalissuearticles values(VEP); is a non-invasive and easily applicable method that provides information about the myelination process. The aim of this paper has been to analyze the evaluation of the VEP results in premature infants, the predictive value and its applicability in clinical practice. Materials and Method: Visual evoked potentials insert ignore into journalissuearticles values(VEPs); refer to the bioelectrical triphasic potentials initiated by flashing light stimulus and recorded by using amplifications and electrodes mounted on the head. It is electrographically based on the measurement of the formation period of the positive wave peak insert ignore into journalissuearticles values(P100 latency); in terms of milliseconds insert ignore into journalissuearticles values(ms);. In the repeated measurements, as P100 latency gradually shorten; the maturation of visual myelization has been increased at that level. The VEPs tests were performed in our hospital within last 3 years, the premature infants were retrospectively analyzed. Results: A total of 197 [102 insert ignore into journalissuearticles values(51,8%); male, 95 insert ignore into journalissuearticles values(48,2%); female] premature infants including 75 very preterm, 54 moderately preterm, and 68 late preterm were included in this study. The mean latency insert ignore into journalissuearticles values(in milliseconds); of P100 wave was 138,94± 21,73; 140,40± 23,85 in the right and left eye respectively. P100 latency was found shorter in the right eye of late preterm as compared to extremely preterm insert ignore into journalissuearticles values(P:0,04);, and in the left eye compared to very preterm and extremely preterm insert ignore into journalissuearticles values(P:0,02; P:0,03, respectively);. P100 latencies of females were found to be shorter as from 18 months of insert ignore into journalissuearticles values(corrected); age insert ignore into journalissuearticles values(p: 0.02);. In addition, it was seen that late preterm infants approached closer to normal values of P100 latency as compared to others insert ignore into journalissuearticles values(P> 0.05); after 12 - 18 months of insert ignore into journalissuearticles values(corrected); age. Conclusion: In our study, it was found that visual maturation was better in females; the most prominent maturation began in the period of 3-6 months of insert ignore into journalissuearticles values(corrected); age, it continued gradually in the following months, and visual maturation generally approached the final adult values by drawing a plateau between 12-18 months of insert ignore into journalissuearticles values(corrected); age.
Keywords : Prematurity, VEP