Preterm White Matter Injury: A Prospective Cohort Study

Area of Science:

• Neonatal Neurology
• Pediatric Radiology
• Perinatal Medicine

Background:

• White matter injury (WMI) is a significant concern in preterm infants, impacting neurodevelopmental outcomes.
• Understanding the incidence and risk factors for WMI, including periventricular-intraventricular hemorrhage (PIVH) and periventricular leukomalacia (PVL), is crucial for early intervention.

Purpose of the Study:

• To determine the incidence of preterm WMI (PIVH and/or PVL) in a cohort of very preterm neonates.
• To identify risk factors associated with the development of PIVH and PVL in this population.

Main Methods:

• A prospective cohort study was conducted in a Level-3 neonatal intensive care unit.
• Serial cranial ultrasounds were performed on 140 preterm neonates (<32 weeks gestation or <1500 g birthweight) at specified postnatal ages.
• Statistical analysis, including univariate and multivariate, was used to evaluate risk factors for PIVH and PVL.

Main Results:

• The overall incidence of preterm WMI was 37.1% (52/140 neonates).
• PIVH occurred in 17.8% and PVL in 24.3% of neonates; severe forms (grade III PIVH, cystic PVL) were less common.
• Multivariate analysis revealed no significant risk factors for PIVH, but hemodynamically significant patent ductus arteriosus and apnea of prematurity were associated with increased PVL risk.

Conclusions:

• Significant WMI affects approximately one-third of very preterm neonates, a rate comparable to developed countries.
• Specific factors like patent ductus arteriosus and apnea of prematurity are associated with PVL, guiding targeted preventative strategies.