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Published on: September 6, 2017
Carbon dioxide and glucose affect electrocortical background in extremely preterm infants
Sverre Wikström1, Fredrik Lundin, David Ley
1Department of Women's and Children's Health, Uppsala University, Uppsala, Sweden. sverre.wikstrom@liv.se
Pediatrics
|March 30, 2011
Summary
Carbon dioxide and plasma glucose levels significantly impact electrocortical activity in extremely preterm infants. Normal physiologic ranges for these factors were linked to optimal electroencephalogram (EEG) background activity.
Area of Science:
- Neonatal Neurology
- Neurophysiology
- Pediatric Critical Care
Background:
- Electrocortical activity monitoring is crucial for assessing brain function in preterm infants.
- Understanding the influence of physiological parameters like carbon dioxide and glucose is vital for optimizing care.
Purpose of the Study:
- To investigate the effects of partial pressure of carbon dioxide (Paco2) and plasma glucose levels on electrocortical activity in extremely preterm infants.
- To determine the relationship between these physiological markers and electroencephalogram (EEG) parameters.
Main Methods:
- Observational study involving 32 infants (gestational age 22-27 weeks).
- Simultaneous electroencephalogram (EEG) recordings and blood gas/plasma glucose analyses were performed.
- Interburst intervals (IBIs) and EEG power were analyzed in relation to Paco2 and glucose levels.
Main Results:
- Increasing Paco2 was associated with longer IBIs, indicating altered EEG patterns.
- EEG power showed an optimal range around 5.1 kPa Paco2, with attenuation at higher or lower levels.
- Plasma glucose levels exhibited a U-shaped relationship with EEG discontinuity, with deviations from 4.0 mmol/L associated with increased discontinuity.
Conclusions:
- Both Paco2 and plasma glucose levels significantly influence EEG activity in extremely preterm infants.
- Physiologic ranges of Paco2 and glucose were associated with the most favorable EEG background.
- Changes in Paco2 and glucose, even within commonly applied therapeutic ranges, can lead to measurable EEG alterations.
