New Research Reveals Devastating Brain Risks for Preterm Infants

A new systematic review has examined the risks and outcomes of two serious brain conditions in preterm infants. Published in Pediatric Research, the study focuses on perinatal arterial ischemic stroke (PAIS) and neonatal cerebral sinovenous thrombosis (CSVT). Researchers analysed data from seven countries to better understand these poorly characterised but life-altering events.

The review, led by van Oldenmark and colleagues, gathered findings from 14 studies across the United States, Canada, the United Kingdom, Germany, the Netherlands, Australia, and France. All studies were published since 2004 and involved infants born before 37 weeks of gestation. In total, 132 cases of PAIS and 57 cases of CSVT were identified.

Key risk factors for PAIS in preterm babies include twin-to-twin transfusion syndrome, abnormal fetal heart rates, and low blood sugar after birth. Prolonged mechanical ventilation and the period following surgery also increase the likelihood of ischemic injury. For CSVT, the transverse sinus is the most commonly affected area, while PAIS cases often involve perforator artery strokes.

The study highlights that earlier gestational age raises the risk of both conditions. Extremely premature infants face the highest incidence. Diffusion-weighted imaging (DWI) proved more effective than standard scans in detecting early signs of ischemic damage.

Neurodevelopmental consequences are severe. Infants with PAIS or CSVT often develop motor impairments, cognitive delays, and epilepsy. CSVT carries a particularly high mortality rate, while survivors frequently experience cerebral palsy and other long-term disabilities.

Despite these findings, the review underscores major gaps in current knowledge. Researchers stress the need for large-scale, controlled studies to develop clear guidelines for prevention, diagnosis, and treatment. Without further evidence, preterm infants remain vulnerable to the lasting impacts of these cerebrovascular events.