Paediatric anaesthesia
September 7, 2026 · via Europe PMC
EEG-Derived Wavelet Index for Assessment of Procedural Sedation in Children Undergoing Magnetic Resonance Examination: A Diagnostic Study.
Zhou S, Dan Y, Jiang J, Ni S, Huang Y, Zheng J, Zhang K.
AI summary — for doctors, generated from the abstract only
An EEG wavelet index outperformed the Ramsay score in predicting pediatric MRI sedation failure.
What was studied
A prospective single-blind diagnostic study of 74 children sedated with chloral hydrate and dexmedetomidine for MRI.
Key findings
- Nine children failed sedation
- WLI AUC 0.902 vs Ramsay 0.734 (ΔAUC 0.162, p = 0.038)
- WLI model had lower Brier score and greater net benefit
Clinical relevance
WLI may help risk-stratify sedation, but few failures and a single center limit conclusions.
Who should care
Limitations
Small sample with only nine failures.
An EEG-based index predicted which children would fail MRI sedation better than clinical scoring.
This is an AI-generated summary of the published abstract, not a clinical recommendation. It may not reflect the full text or subsequent updates — verify against the original source before acting on it.
Abstract
Background
Procedural sedation is often essential for children undergoing imaging examinations. Whether the wavelet index (WLI) could outperform Ramsay Sedation Score (RS) in assessing sedation depth and identifying children at risk of MRI sedation failure was unknown.
Methods
This prospective, single-blind study was performed at a tertiary care hospital. WLI and RS were measured in 74 pediatric patients who underwent MRI scanning after procedural sedation with chloral hydrate and dexmedetomidine. Once the patient reached RS scores 5 or 6, the MRI examination was initiated. Successful MRI sedation was defined as completion of the planned MRI examination at the first attempt with no clinically significant motion artifact and no need for additional rescue sedation or conversion to general anesthesia.
Results
Sixty-five children successfully completed the MRI examination, and nine failed due to insufficient sedation. The AUC for WLI was 0.902 (95% CI, 0.814-0.990) versus 0.734 (95% CI, 0.603-0.876) for RS, with a significant paired difference between the two ROC curves (ΔAUC, 0.162; 95% CI, 0.004-0.329; p = 0.038). The WLI-based model showed better overall predictive performance than the RS-based model, with a lower Brier score (0.0704 vs. 0.0908). On decision curve analysis, the WLI-based model provided greater net benefit throughout the clinically relevant threshold range (0.05-0.40).
Conclusions
WLI may provide an adjunctive, non-stimulating measure for risk stratification in pediatric MRI sedation, although the clinical utility of WLI-guided management should be confirmed in prospective studies.
Trial registration
Clinical Trial Registry of China: ChiCTR2500103661.
DOI
10.1002/pan.70305
PMID
42703870
Research metadata (titles, abstracts, authors, publication dates) is sourced from Europe PMC, which aggregates content from PubMed/MEDLINE, PubMed Central, and other providers under the U.S. National Library of Medicine (NLM/NCBI). NLM does not claim copyright on abstracts; the original journal publishers or authors may hold rights to the full articles. AI-generated summaries are derived only from the abstract, never the full text, and are always labeled as AI-generated.
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