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Sequential use of standard and ambulatory EEG in neonatal seizures
S L Kerr1, D W Shucard, M H Kohrman
1Department of Neurology, State University of New York, Buffalo.
Insights
Predicting continued seizures in neonates is challenging. Combining standard short-term electroencephalography (SEEG) and ambulatory EEG (AEEG) significantly improved seizure prediction accuracy in infants compared to using either test alone.
Area of Science:
- Neonatal neurology
- Clinical neurophysiology
Background:
- Neonatal seizures often lack clear predictors for long-term continuation.
- Accurate prediction of persistent seizures is crucial for timely intervention and management.
Purpose of the Study:
- To evaluate the efficacy of standard short-term electroencephalography (SEEG) and ambulatory electroencephalography (AEEG) in predicting seizure continuation beyond the neonatal period.
- To determine if combining SEEG and AEEG enhances predictive accuracy.
Main Methods:
- Thirteen neonates with seizures after 7 days of age were assessed.
- Standard short-term electroencephalography (SEEG) was performed during initial seizures.
- Ambulatory electroencephalography (AEEG) was conducted between 37-44 weeks corrected age.
- Predictive accuracy for seizures at 3-4 months corrected age was analyzed for each method and their combination.
Main Results:
- Individually, SEEG predicted continued seizures in 8/13 infants, and AEEG in 10/13.
- The combined use of SEEG and AEEG accurately predicted continued seizures in 12/13 infants.
- Combined analysis yielded significantly different and improved results compared to independent analyses (Z = 3.98, p < 0.001).
Conclusions:
- The combination of SEEG and AEEG offers a more robust prediction of ongoing seizure activity in infants with neonatal seizures.
- This combined approach enhances the ability to predict seizure persistence compared to using either EEG method in isolation.
- Further research may validate this combined diagnostic strategy for improved patient outcomes.
Abstract:
Adequate predictors do not exist to indicate whether seizures are likely to continue beyond the neonatal period. Thirteen neonates with seizures occurring after 7 days of age were evaluated with standard short-term electroencephalography (SEEG) during the initial seizures and with ambulatory EEG (AEEG) when each infant was within 37-44 weeks corrected age (i.e., gestational age plus chronologic age). Eight of 13 SEEGs, 10 of 13 AEEGs, and 12 of 13 with the combined use of both SEEGs and AEEGs accurately predicted the occurrence of seizures at 3-4 months corrected age. Results with SEEG and AEEG did not produce significantly different outcomes. Combined analysis of SEEG and AEEG produced significantly different results from those calculated when the two EEG types were analyzed independently (Z = 3.98, p less than 0.001). The findings indicate that the use of both of these tests may improve the ability to predict continued seizure activity in infants with neonatal seizures when compared to the use of each measure separately.