Quantification electroencephalography response to procedural pain during heel puncture in preterm infants

Area of Science:

• Neuroscience
• Neonatal Medicine
• Biomedical Engineering

Background:

• Current pain assessment in preterm infants relies on subjective methods, lacking objectivity and being labor-intensive.
• Non-invasive electroencephalography (EEG) offers a potential objective tool for pain assessment in neonates.
• Specific EEG markers for pain detection in preterm infants remain unidentified.

Purpose of the Study:

• To quantify electroencephalography (EEG) responses to procedural pain in preterm infants.
• To identify specific EEG parameters, frequency bands, and brain regions indicative of pain.

Main Methods:

• Analyzed 57 EEG datasets from 42 preterm infants across eight EEG channels.
• Quantified amplitude-integrated EEG (aEEG) upper and lower margins (UM-LM).
• Assessed frequency power and time-frequency power across five bands (low delta, high delta, theta, alpha, beta) during pre-puncture, during-puncture, and post-puncture periods.

Main Results:

• Significant differences in UM-LM aEEG were observed at frontal channels (Fp1, Fp2) across puncture periods.
• Central channels (C3, C4) showed significant pain responses in frequency and time-frequency power.
• The low delta frequency band's time-frequency power demonstrated the most significant changes related to pain.

Conclusions:

• The central brain region, particularly the low delta frequency band in time-frequency analysis, is a significant indicator of procedural pain in preterm infants.
• EEG provides an objective, non-invasive method for pain detection in nonverbal preterm infants.
• Focusing on specific EEG channels and frequency bands can enhance pain assessment accuracy.