Archives of Disease in Childhood - Fetal and Neonatal Edition | VOL. 99
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8.7\u2005Continuous EEG derived carbon dioxide monitor for newborn preterm babies \u2013 levels of agreement with partial pressure of arterial blood carbon dioxide

Publication Date Jun 1, 2014

Abstract

BackgroundContinuous monitoring of partial pressure of arterial blood carbon dioxide (PaCO2) is important in preterm babies during the first 36 h after birth to avoid episodes of hypo/hypercarbia. There is a need to develop a reliable technique for the continuous monitoring of PaCO2. The purpose of this study was to determine if continuous monitoring of PaCO2 can be performed through the automatic analysis of preterm electroencephalography (EEG).AimWe aimed to determine the levels of agreement between PaCO2 measured by blood gas analysis and the partial pressure of carbon dioxide (PeegCO2) predicted by automatic analysis of EEG.MethodsThirty-six hour EEG recordings using 7 hydrogel leads were performed in 12 babies born before 30 weeks’ gestation from soon after birth. Babies with abnormal cranial ultrasound scans were excluded from analysis. Routine arterial blood gases were performed using ABL 835 Flex (Radiometer). EEG was automatically analysed in real-time for changes in amplitude, frequency and interburst intervals in the EEG waveforms. PeegCO2 was continuously predicted using an algorithm. Impedance was measured hourly and accepted if below 5 kOhms. Artefactual EEG was managed automatically by the software and through qualitative reporting.ResultsA strong correlation (R2 = 0.71; n = 49; p < 0.001) between PaCO2 and PeegCO2 was demonstrated. The overall bias (mean difference: PaCO2–PeegCO2) was 0.05 kPa and the precision (standard deviation of differences) was 0.56 kPa.ConclusionPeegCO2 monitoring is a new development ...

Concepts

Partial Pressure Of Carbon Dioxide Pressure Of Carbon Dioxide Pressure Of Arterial Carbon Dioxide Standard Deviation Of Differences Arterial Carbon Dioxide Interburst Intervals EEG Waveforms Neonatal Intensive Care Carbon Dioxide Precision Data

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