Cerebral Hemodynamics During Neonatal Cerebrospinal Fluid Removal

Area of Science:

• Neonatal Neurology
• Pediatric Neurosurgery
• Medical Device Technology

Background:

• Neonatal posthemorrhagic hydrocephalus (PHH) is typically managed with cerebrospinal fluid (CSF) removal.
• Optimizing CSF volume removal is crucial for improving cerebral hemodynamics and oxygenation in infants with PHH.

Purpose of the Study:

• To determine the optimal cerebrospinal fluid (CSF) volume for removal via ventricular reservoir taps to enhance cerebral hemodynamics and oxygenation in neonatal PHH.
• To assess the efficacy of near-infrared spectroscopy (NIRS) in monitoring these changes.

Main Methods:

• Continuous monitoring of cerebral hemodynamics and oxygenation using near-infrared spectroscopy (NIRS) in four newborns undergoing 28 ventricular reservoir taps.
• Removal of 10 mL/kg of CSF at each tap, with analysis of variations in cerebral blood flow, volume, and oxygenation.
• Statistical analysis using repeated measures ANOVA and Pearson's r correlation coefficient to assess changes and associations.

Main Results:

• Significant increases in cerebral blood flow and volume were observed at 50% of the targeted CSF volume removal (P < 0.001).
• While absolute cerebral tissue oxygenation index remained unchanged, variations in cerebral blood flow and oxygenation showed a positive correlation (r = 0.57; P = 0.002).

Conclusions:

• The optimal CSF removal volume for improving cerebral hemodynamics and perfusion in neonatal PHH may be less than the conventional 10 mL/kg.
• Further research is warranted to explore the role of NIRS in personalizing CSF removal strategies for individual patients.