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Neonatal posthemorrhagic ventricular dilatation: Monitoring and medical intervention

Ceyda Acun1, Ibrahim Qattea2, Hany Aly1

  • 1Division of Neonatology, Cleveland Clinic Children's, Cleveland, OH, USA.

Seminars in Fetal & Neonatal Medicine
|March 24, 2026
PubMed

Insights

Posthemorrhagic hydrocephalus (PHH) and ventricular dilatation (PHVD) in preterm infants stem from complex cerebrospinal fluid issues. Early, individualized intervention guided by quantitative ultrasonography is key to preventing brain injury and improving outcomes.

Area of Science:

  • Neonatal Neurology
  • Pediatric Neurosurgery
  • Developmental Neuroscience

Background:

  • Posthemorrhagic ventricular dilatation (PHVD) and posthemorrhagic hydrocephalus (PHH) are significant complications following intraventricular hemorrhage in extremely preterm infants.
  • These conditions arise from multifactorial cerebrospinal fluid dynamic disturbances, including impaired resorption, flow obstruction, and inflammation.
  • Despite advances in neuroimaging and early intervention, treatment timing and thresholds vary significantly across institutions.

Purpose of the Study:

  • To review the current understanding of PHVD/PHH pathophysiology.
  • To discuss the effects on brain maturation.
  • To summarize evidence-based monitoring and medical management strategies, focusing on randomized controlled trials and meta-analyses.

Main Methods:

  • Comprehensive literature review focusing on randomized controlled trials and meta-analyses.
  • Analysis of current understanding of cerebrospinal fluid dynamics in PHVD/PHH.
  • Emphasis on quantitative cranial ultrasonography and early, individualized intervention strategies.

Main Results:

  • PHVD and PHH are complex conditions with multifactorial causes affecting cerebrospinal fluid dynamics.
  • Quantitative cranial ultrasonography plays a pivotal role in monitoring.
  • Early and individualized intervention is crucial for mitigating brain injury.

Conclusions:

  • Optimizing management of PHVD/PHH requires a thorough understanding of pathophysiology and brain maturation effects.
  • Standardized, evidence-based monitoring and intervention protocols are needed.
  • Quantitative cranial ultrasonography and timely, individualized treatment are essential for improving neurodevelopmental outcomes in affected infants.

Keywords:
Intraventricular hemorrhageNeurodevelopmental outcomeNeuromonitoringNeuroprotectionPosthemorrhagic hydrocephalusPreterm infantVentricular dilatation

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