Neonatal Seizures in Preterm Infants

Park, Joo Hyung; Jung, In Ah; Han, Ji Yoon; Sung, In Kyung; Lee, Ju Young; Youn, Young Ah; Lee, In Goo

Abstract

PURPOSE
Neonatal seizures are the most prominent feature of neonatal neurologic dysfunction, and the lifespan risk for seizures is highest in the neonatal period, especially in preterm infants. This study was aimed to find and analyze the risk factors and clinical profiles of seizures in preterm infants.
METHODS
Sixteen cases of preterms with seizures were retrospectively reviewed between Mar. 2009 and Feb. 2012.
RESULTS
The average gestational age was 30.3+/-4.1 weeks and 11 patients (68.7%) experienced seizures within 1 week after the birth. Eight cases (50%) had a perinatal asphyxia during the delivery and 7 cases (43.8%) had a history of perinatal maternal illness. Various types of seizures were observed of which subtle seizures were the most common (50%). Electroecephalographies were performed in 12 cases, which showed abnormal findings in 9 cases (75%). Neuroimaging studies were performed in 16 cases and showed abnormal findings in 10 cases (62.5%). Thirteen patients were discharged in the improved state and 3 patients expired. Eight cases had normal outcome, while 3 cases showed developmental delay. Prognosis was unknown in 2 cases due to follow up loss.
CONCLUSION
Neonatal asphyxia is the most important risk factor. Furthermore, infants with a history of perinatal maternal illness appear to be at risk for neonatal seizures. EEG is a sensitive method for assessing seizure activity and prognosis. Monitoring high risk infants with asphyxia and a history of perinatal maternal illness, and early postnatal tracing with EEG is required to detect and manage high risk preterms.