Does the first hour of continuous electroencephalography predict neonatal seizures?

Area of Science:

• Neonatal neurology
• Clinical neurophysiology
• Pediatric critical care

Background:

• Prolonged continuous video-electroencephalography (cEEG) is crucial for neonates at risk of seizures.
• Real-time interpretation of cEEG is often limited by cost and expertise.
• Predicting seizure risk early can optimize resource allocation and patient management.

Purpose of the Study:

• To determine if the first hour of cEEG can predict seizures in neonates.
• To assess the diagnostic accuracy of early cEEG findings in identifying seizure risk.
• To evaluate the utility of early cEEG interpretation in guiding neonatal seizure management.

Main Methods:

• Retrospective multicentre diagnostic accuracy study.
• Analysis of cEEG data from 266 term neonates at risk for or with suspected seizures.
• Expert and novice interpretation of the first hour of cEEG, categorizing background activity as normal, mildly, moderately, or severely abnormal.

Main Results:

• 51% of neonates who developed seizures had their first seizure within the initial hour of monitoring.
• An abnormal cEEG background in the first hour was associated with a significantly increased risk of subsequent seizures (up to sevenfold for severely abnormal backgrounds).
• Inter-rater agreement for background grading was very good (weighted kappa=0.81).

Conclusions:

• The first hour of cEEG is a valuable tool for predicting seizure occurrence in at-risk neonates.
• Early identification of abnormal cEEG patterns can identify neonates requiring intensified monitoring.
• This approach can improve the efficiency and effectiveness of seizure management in neonatal intensive care units.