Cerebral regional oxygen saturation (crSO2): are different sensors comparable?

Area of Science:

• Neonatal physiology
• Medical device technology
• Cerebral oxygenation monitoring

Background:

• Near-infrared spectroscopy (NIRS) is crucial for measuring cerebral regional oxygen saturation (crSO2) in neonates.
• The INVOS 5100 device offers both neonatal and pediatric sensors, but their comparative performance is unstudied.
• Existing data suggest a 10% difference in measurements between adult and pediatric sensors, highlighting the need for sensor-specific validation.

Purpose of the Study:

• To compare the accuracy and reliability of the INVOS 5100 neonatal sensor versus the pediatric sensor.
• To determine if these sensors yield comparable crSO2 values in a mixed neonatal population.
• To inform the interpretation of crSO2 data across studies utilizing different INVOS 5100 sensors.

Main Methods:

• A cohort of 40 neonates underwent simultaneous crSO2 measurements using both neonatal and pediatric INVOS 5100 sensors.
• Measurements were taken in identical positions and under identical conditions to minimize variability.
• Each sensor was applied five times to assess reproducibility through mean values and standard deviations.

Main Results:

• No significant difference was observed in crSO2 measurements between the neonatal sensor (mean, 76.1 ± 7.9) and the pediatric sensor (mean, 76.4 ± 8.1).
• Reproducibility analysis showed similar means of standard deviations for both sensors (neonatal, 3.7 ± 1.6; pediatric, 3.1 ± 1.3), indicating comparable reliability.
• The findings suggest interchangeability of the sensors within this neonatal cohort.

Conclusions:

• INVOS 5100 neonatal and pediatric sensors provide identical crSO2 measurements in a mixed neonatal cohort.
• Studies employing either the neonatal or pediatric INVOS 5100 sensor for crSO2 monitoring in neonates are directly comparable.
• This validates the use of both sensors, enhancing flexibility in neonatal neuroimaging research.