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Published on: November 20, 2015
Cystic Periventricular Leukomalacia in Preterm Infants: Clinical Risks, Heart Rate, and Oxygenation Patterns
Movicque King1, Ashlee Commeree2, Karen Fairchild1
1University of Virginia, Department of Pediatrics, Virginia, United States, Charlottesville.
Insights
Cystic periventricular leukomalacia (cPVL) in preterm infants is linked to hypotension and significant oxygen saturation (SpO₂) variability, indicating potential oxidative stress. Further research is needed to understand SpO₂
Area of Science:
- Neonatal Neurology
- Perinatal Medicine
- Developmental Pediatrics
Background:
- Cystic periventricular leukomalacia (cPVL) is a leading cause of neurodevelopmental deficits in preterm infants.
- Clinical and physiological factors contributing to cPVL are not fully understood.
- Early identification of cPVL-associated variables is crucial for timely intervention.
Purpose of the Study:
- To compare maternal and infant clinical characteristics between preterm infants with and without cPVL.
- To analyze heart rate (HR) and oxygen saturation (SpO₂) patterns in the first six weeks of life for infants with cPVL versus controls.
- To identify physiological markers associated with cPVL development.
Main Methods:
- Retrospective analysis of infants admitted to a level IV NICU from 2012-2022.
- 1:1 matching of infants with cPVL to controls based on sex, gestational age, and birth year.
- Calculation and comparison of hourly HR and SpO₂ metrics (mean, SD, skewness, kurtosis) from birth to day 42.
Main Results:
- Infants with cPVL required more vasopressor support and hydrocortisone therapy.
- No significant differences in HR metrics were observed between groups.
- Infants with cPVL exhibited higher mean SpO₂, but also increased SpO₂ desaturations (negative skewness) and outlier values (higher kurtosis).
Conclusions:
- cPVL is associated with hypotension requiring treatment and distinct SpO₂ dynamics post-birth, suggesting increased oxidative stress.
- SpO₂ variability may serve as a potential indicator or contributor to cPVL.
- Further investigation into SpO₂ patterns is warranted to elucidate their role in cPVL pathogenesis.
Objective:
Cystic periventricular leukomalacia (cPVL) is a major cause of neurodevelopmental impairment in preterm infants, yet associated clinical and physiologic variables remain incompletely defined. We sought to identify differences in maternal and infant clinical variables, including patterns of heart rate (HR) and oxygen saturation (SpO2) in the first 6 weeks after birth, in infants with cPVL compared with matched controls.
Study Design:
We conducted a single-center, retrospective study of infants admitted to a level IV neonatal intensive care unit (NICU) from 2012 to 2022. Infants with cPVL were matched 1:1 with controls by sex, gestational age, and birth year. Clinical variables were extracted from institutional databases. Hourly averages of HR and SpO2 mean, standard deviation, skewness, and kurtosis were calculated from 0.5 Hz data from standard NICU monitors from birth to day 42, and compared for infants with and without cPVL. Continuous variables were compared with t-tests, categorical variables with χ2 tests, and time series HR and SpO2 metrics with t-tests using Bonferroni correction for multiple comparisons.
Results:
Nineteen infants with cPVL and 19 matched controls were identified. Maternal characteristics were similar between groups. A higher percentage of infants with cPVL received vasopressor support and were more likely to receive hydrocortisone therapy, while other morbidities and blood gas values were comparable between groups. In the cPVL group, General Movement Assessment was abnormal in all infants who had it performed, and cerebral palsy occurred more frequently. There were no consistent differences in HR metrics in the 42-day period. Infants with cPVL had consistently higher mean SpO2 but also more negative skewness (more desaturations) and higher kurtosis (more outlier values), implying more swings from low to high SpO2.
Conclusion:
In this cohort, cPVL was associated with treatment for hypotension and sustained differences in SpO2 after birth, suggesting more oxidative stress. Further work is needed to determine how SpO2 dynamics reflect, predict, or perhaps contribute to cPVL.
Key Points:
· cPVL was associated with treatment for hypotension with pressors or steroids.. · cPVL was associated with sustained differences in SpO2 after birth.. · There were no consistent differences in HR metrics between the cPVL and control cohorts..
