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Updated: May 27, 2026
The Hypoxic Ischemic Encephalopathy Model of Perinatal Ischemia
Published on: November 19, 2008
Reduced Magnetic Resonance Imaging-Visible Perivascular Spaces in Neonatal Hypoxic-Ischemic Encephalopathy: A
Xiao Dong1, Yi He2, Junwei Li1
1Department of Radiology, The Affiliated Children's Hospital of Xiangya School of Medicine, Central South University (Hunan Children's Hospital), Changsha, China.
Background:
To evaluate magnetic resonance imaging (MRI)-visible perivascular spaces (PVSs) as an imaging marker of glymphatic function in neonatal hypoxic-ischemic encephalopathy (HIE) and to assess the diagnostic utility of a combined clinical-PVS model.
Methods:
This retrospective study included 266 neonates with HIE, categorized as mild (n = 50) or moderate-to-severe (n = 216). PVS burden in the basal ganglia (BG) and white matter was assessed on T2-weighted imaging using visual grading and volumetric quantification. Logistic regression models (clinical vs combined clinical-PVS vs traditional MRI injury pattern model) were constructed, with performance evaluated by the area under the receiver operating characteristic (ROC) curve (AUC) and decision curve analysis.
Results:
A significant severity-dependent reduction in PVS metrics was observed in the BG. Neonates in the moderate-to-severe group exhibited significantly lower BG PVS fractions compared to the mild group (P < 0.001). Multivariate analysis identified BG PVS fraction and clinical indicators as independent predictors of severity. The combined clinical-PVS model achieved an AUC of 0.82, which was significantly higher than the AUC of 0.69 yielded by the traditional MRI injury pattern model (P < 0.05).
Conclusions:
HIE severity is characterized by a progressive reduction in BG PVS, suggesting a structural collapse of the glymphatic network in severe injury. The combined application of clinical markers and quantitative PVS metrics provides superior diagnostic accuracy compared to conventional MRI injury patterns. This objective approach complements clinical assessment and enhances risk stratification for neonates with HIE.
