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Visual evoked potentials in high-risk infants
Insights
Visual evoked potentials (VEPs) can predict poor outcomes in high-risk infants. Abnormal VEPs, particularly absence or abnormal waveforms, are key indicators for prognosis, suggesting selective, early, and repeated VEP testing.
Area of Science:
- Neuroscience
- Developmental Pediatrics
- Ophthalmology
Background:
- High-risk infants require early neurodevelopmental assessment.
- Visual evoked potentials (VEPs) assess visual pathway integrity.
- Predicting long-term outcomes in infants is crucial for timely intervention.
Purpose of the Study:
- To evaluate the predictive value of flash visual evoked potentials (VEPs) for clinical outcomes in high-risk infants.
- To determine if VEP maturation correlates with neurodevelopmental outcomes at one year of age.
Main Methods:
- Flash VEPs were recorded in 109 high-risk infants.
- VEP results were compared with clinical outcomes at one year of age.
- VEPs were recorded early (within three months) and sometimes repeated for abnormal cases.
Main Results:
- 80% of infants had normal outcomes and normal VEP maturation.
- 18% of infants exhibited abnormal VEPs.
- Abnormal VEPs were significantly more frequent in infants with abnormal outcomes (54%) and poor outcomes (86%) compared to normal outcomes (14%).
Conclusions:
- VEPs are effective in predicting poor neurodevelopmental outcomes in high-risk infants.
- Absence or abnormal waveforms in VEPs are significant prognostic indicators.
- Selective, early (post-birth), and repeat VEP testing (around two months) is recommended, potentially guided by ultrasound findings.
Abstract:
Flash VEPs were recorded in 109 high-risk infants, and the result were compared with the clinical outcome of the infants at the age of one year. 87 of the infants (80%) had a normal outcome and also seemed to have normal VEP maturation. This material was used as a reference for infants with abnormal outcome. Altogether, 20 infants (18%) had abnormal VEPs. In most of these repeated VEPs were recorded. In 70 cases the first VEP was recorded at an age of less than three months. Among these 57 children had normal outcome, with abnormal VEPs in 8 cases (14%). 13 infants who had an abnormal outcome had abnormal VEPs in 7 cases (54%). 7 infants of them had poor outcome, and they had abnormal VEPs in 6 cases (86%). The difference between normal and abnormal outcome was statistically significant. The present results indicate that it is possible to predict the poor outcome but not the moderate abnormality by VEP. The absence of VEP or its abnormal wave form were the most important parameters to predict the prognosis. Our present opinion is that VEPs should be recorded selectively, e.g. according to the findings in ultrasound examination, at least twice, the first time as soon as possible after birth and the second time at the age of two months.