Related Experiment Videos
Clinical application of evoked electroencephalographic responses in newborn infants. I: Perinatal asphyxia
Insights
Evoked electroencephalographic responses help assess brain development in newborns with perinatal asphyxia. Abnormalities in visual and somatosensory evoked responses correlate with asphyxia severity, aiding prognosis.
Area of Science:
- Neonatal neurology
- Neurophysiology
- Clinical electroencephalography
Background:
- Evoked electroencephalographic responses are crucial for evaluating cerebral maturation in newborns.
- Perinatal asphyxia poses significant risks to neonatal brain development.
- Wider clinical application of evoked responses is needed for asphyxiated infants.
Purpose of the Study:
- To investigate the utility of visual evoked responses (VERs) and somatosensory evoked responses (SSRs) in assessing perinatal asphyxia in newborns.
- To correlate evoked response alterations with the degree of asphyxia.
- To develop a scoring system for quantitative evaluation and prognostic assessment.
Main Methods:
- Examined 57 newborn infants with varying degrees of perinatal asphyxia.
- Performed 154 examinations using photostimulation for VERs.
- Recorded SSRs in 72 examinations.
- Developed a scoring system based on observed alterations in evoked responses.
Main Results:
- VERs were affected in 85% of cases, while SSRs were affected in 65%.
- Abnormal response patterns, increased latency, and poor photic driving were characteristic findings.
- The evoked response risk-score showed a strong correlation with the degree of asphyxia.
- Repeated high risk-scores indicated a serious prognostic sign.
Conclusions:
- Evoked electroencephalographic responses are sensitive indicators of cerebral injury in perinatal asphyxia.
- The developed scoring system provides a quantitative measure of asphyxia severity and aids in prognosis.
- Serial evoked response assessments are vital for monitoring and predicting outcomes in asphyxiated newborns.
Abstract:
Evoked electroencephalographic responses are useful for the study of cerebral maturation in full-term and pre-term newborn infants. In an attempt to achieve wider clinical application, 57 newborn infants with differing degrees of perinatal asphyxia were examined. Altogether 154 examinations were performed. In all of them photostimulation was used, and in 72 investigations somatosensory evoked responses were also recorded. The following results were obtained: (1) Visual evoked responses were affected in 85 per cent of the cases. Somatosensory evoked responses were affected less often - in 65 per cent of the newborn babies examined. The incidence and degree of deviations were related to the degree of asphyxia. (2) The most characteristic features of the evoked responses in asphyxiated infants were abnormal response patterns, increase of latency and poor photic driving. (3) On the basis of all alterations observed, a scoring system was developed which enabled quantitative evaluation. The evoked response risk-score correlated well with the degree of asphyxia. (4) Repeated observations were important: a permanently high risk-score at repeated investigations was a serious prognostic sign.