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Association between early cerebral oxygenation and neurodevelopmental impairment or death in premature infants
Anup C Katheria1, Jacob Stout2, Ana L Morales2
1Neonatal Research Institute, Sharp Mary Birch Hospital for Women & Newborns, San Diego, CA, USA. anup.katheria@sharp.com.
Insights
Prolonged cerebral hypoxia in premature infants (<32 weeks gestational age) is linked to neurodevelopmental impairment (NDI) or death. Lower cerebral oxygen saturation (StO2) levels predict these adverse outcomes.
Area of Science:
- Neonatalogy
- Neuroscience
- Pediatric Medicine
Background:
- Premature infants (<32 weeks gestational age) are at high risk for neurodevelopmental impairment (NDI).
- Cerebral oxygenation monitoring is crucial for assessing brain health in these vulnerable infants.
- Understanding the link between early cerebral oxygenation and long-term neurodevelopment is essential for improving outcomes.
Purpose of the Study:
- To investigate the association between cerebral oxygenation in the first 72 hours of life and NDI at 2 years corrected age.
- To identify specific thresholds of cerebral hypoxia that predict adverse neurodevelopmental outcomes in extremely premature infants.
Main Methods:
- A prospective observational cohort study involving 127 infants born <32 weeks gestational age.
- Cerebral oxygenation was monitored using near-infrared spectroscopy (NIRS) within the first 72 hours of life.
- Statistical analysis, including generalized estimating equations, was used to assess the relationship between cerebral oxygenation parameters and NDI or death.
Main Results:
- Infants with NDI or death exhibited a significantly increased duration of cerebral hypoxia compared to those without (4% vs 2.3%, p=0.001).
- This effect was more pronounced in the subgroup of infants born between 23-27 weeks gestational age (7.6% vs 3.2%, p<0.001).
- Cerebral oxygen saturation (StO2) below 67% was identified as a predictor of death or NDI (OR 2.75, p=0.049).
Conclusions:
- Increased duration of cerebral hypoxia in the early neonatal period is associated with a higher risk of NDI or death in infants born <32 weeks gestational age.
- Cerebral oxygenation monitoring, particularly identifying periods of hypoxia, can aid in predicting neurodevelopmental outcomes.
- Targeting interventions to maintain adequate cerebral oxygenation may be crucial for improving neurodevelopmental outcomes in extremely premature infants.
Objective:
To assess the relationship between cerebral oxygenation in the first 72 h of life and neurodevelopmental impairment (NDI) at 2 years corrected age in former premature infants.
Study Design:
Prospective observational cohort study of 127 infants <32 weeks GA at birth with cerebral oxygenation monitoring using NIRS in the first 72 h of life.
Results:
Using a threshold cutoff for cerebral hypoxia, infants with NDI or death had increased duration of hypoxia (4 vs 2.3%, p = 0.001), which was more pronounced in the 23-27 week subgroup (7.6 vs 3.2%, p < 0.001). Individual generalized estimating equations to adjust for repeated measures were modeled in this subgroup for the physiologic parameters including StO2. StO2 < 67% was a predictor for death or NDI (OR 2.75, 95% CI 1.006, 7.5132, p = 0.049).
Conclusion:
An increased duration of cerebral hypoxia is associated with NDI or death in infants born <32 weeks GA.
