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Updated: Dec 11, 2025
Non-invasive Optical Measurement of Cerebral Metabolism and Hemodynamics in Infants
Published on: March 14, 2013
Changes in cerebral tissue oxygenation and fractional oxygen extraction with gestational age and postnatal maturation
Mohamed A Mohamed1, Michael J Frasketi2, Safwat Aly3
1Department of Neonatology, Cleveland Clinic Children's Hospital, Cleveland, OH, USA. mohamem2@ccf.org.
Insights
Cerebral tissue oxygenation (SctO2) decreases with age in preterm infants, while cerebral tissue oxygen extraction (cFTOE) increases. This study tracked these changes over 28 days using NIRS.
Area of Science:
- Neonatal physiology
- Neuroscience
- Medical imaging
Background:
- Preterm infants face unique physiological challenges.
- Monitoring cerebral oxygenation is crucial for neonatal care.
- Near-infrared spectroscopy (NIRS) is a non-invasive tool for assessing brain oxygenation.
Purpose of the Study:
- To investigate the relationship between cerebral tissue oxygen saturation (SctO2) and cerebral tissue fractional oxygen extraction (cFTOE) and gestational age (GA).
- To analyze these correlations over the first 28 days of postnatal life.
- To understand the developmental trajectory of cerebral oxygen metabolism in preterm infants.
Main Methods:
- Near-infrared spectroscopy (NIRS) was used to monitor SctO2 and cFTOE in preterm infants.
- Data were collected for the first 28 days of life.
- Linear mixed models were employed for data analysis.
Main Results:
- A total of 70 preterm infants were studied.
- Mean SctO2 showed an inverse correlation with both gestational age and postnatal age.
- cFTOE demonstrated a direct relationship with both gestational age and postnatal age.
Conclusions:
- Cerebral tissue oxygen saturation (SctO2) inversely correlates with gestational age and postnatal age in preterm infants.
- Cerebral tissue fractional oxygen extraction (cFTOE) directly correlates with gestational age and postnatal age.
- These findings provide insights into the maturation of cerebral oxygen metabolism during early life.
Objective:
This study examined the correlation of cerebral tissue oxygen saturation (SctO2) and cerebral tissue fractional oxygen extraction (cFTOE) with gestational age (GA) and postnatal age over the first 28 days of life.
Study Design:
Preterm infants with birth weight (BW) <1500 g were monitored with near-infrared spectroscopy (NIRS) during the first 28 days of life. SctO2 and cFTOE measurements were analyzed using a linear mixed model.
Results:
A total of 70 preterm infants were included. Mean SctO2 decreased with increasing GA; SctO2 was 76.4% and 74.6% in the first 24 h for infants 24 and 28-week GA, respectively. For infants born at 24 and 28 it decreased to 52.9% and 58.4% at 28 days of life, respectively. cFTOE increased with increasing GA and postnatal age.
Conclusions:
There is an inverse relationship between SctO2 and gestational age and postnatal age but a direct relationship between cFTOE with GA and postnatal age.
