Mechanical Ventilation
August 2, 2024This abstract discusses an investigation into how anesthesia indices respond to changes in alpha-oscillatory activity in electroencephalogram (EEG) signals during anesthesia. The authors analyzed data from two studies and modified the alpha-band activity (8-12 Hz) in the EEG signals to observe the impact on four processed EEG indices: bispectral index (BIS), state entropy (SE), qCON, and patient state index (PSI).
The study found that while alpha-band activity appears to be linked to the quality of anesthesia, the anesthesia indices were not significantly or consistently affected by changes in alpha-band activity. SE showed the most significant change, while PSI and BIS showed the least change. The authors conclude that anesthesiologists should focus on the raw EEG or its spectral representation to assess the strength of alpha-oscillatory activity, rather than relying solely on processed EEG indices.
