ICU sedation, delirium & recovery
Sedation-related Electroencephalographic Patterns in Acute Hypoxemic Respiratory Failure
Authors' conclusion
Continuous intravenous sedation results in EEG Ups that are not present in natural sleep, correlate with dose of sedation, clinical sedation score, and clinical outcomes.
Study context
- Population
- Mechanically ventilated patients with early acute hypoxemic respiratory failure (AHRF) and PaO2/FiO2 less than 200 mmHg receiving various sedation-opioid regimens1,832 h of EEG analysed
- Participants
- 23 participants
- Outcome
- Relevance of EEG Ups (EEG patterns not seen in natural sleep) and their association with sedation
Methodological detailscontinuous EEG monitoring, Continuous EEG from inclusion until extubation, death, or up to 7 days; mean ± SD 43 ± 25 h/patient
- Continuous EEG monitoring
- Continuous EEG from inclusion until extubation, death, or up to 7 days; mean ± SD 43 ± 25 h/patient
Main finding
As reported in the abstract
EEG Ups prevalence
- EEG Ups share of total recording time overall
- 42%
- Higher EEG Ups prevalence with sedation-opioid combinations
- P ≤ 0.029
- Higher EEG Ups prevalence with high sedation dose
- P ≤ 0.035
- Higher EEG Ups prevalence with deeper clinical sedation score
- P ≤ 0.024
Observational data: associations, not effects.
Further findings
Association of EEG Ups with ICU mortality
- EEG Ups prevalence associated with ICU mortality
- P < 0.001
- ICU mortality
- 22%
Original publication
Sedation-related Electroencephalographic Patterns in Acute Hypoxemic Respiratory Failure. Anesthesiology. Published 5 August 2025. doi:10.
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