ArticleBMJ open2026
Sources, impacts and mechanisms of non-pharmacological artefacts in processed electroencephalography monitoring during anaesthesia and intensive care: a scoping review protocol.
Article in BMJ open, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.
What it found
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
1 citing paper in PubMed.
- Review
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
3 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
introductionProcessed electroencephalography (pEEG) monitoring is commonly employed to assess the level of hypnosis under anaesthesia, although it is susceptible to various non-brain-related artefacts. Several sources of artefacts have been published, but how these sources affect the pEEG and their related hypnotic indices have not been summarised before. This scoping review will summarise the published literature on how non-pharmacological artefacts affect pEEG monitoring during anaesthesia andintensive care, including their influence on the hypnotic index and the underlying mechanisms of interference. METHODS AND ANALYSIS: Non-pharmacological, non-brain-related sources of artefacts affecting human patients under anaesthesia or intensive care will be included. The covered concepts include the sources of interference affecting pEEG in which the artefact causes the hypnotic index to no longer be reflective of the depth of hypnosis, how they affect the hypnotic index, and the suspected mechanism by which they affect the pEEG monitor. Databases to be searched will include PubMed, Ovid MEDLINE, Embase, Cochrane Library, CINAHL and the Web of Science. Grey literature will include sources from Google Scholar, the Web of Science, preprint repositories and reference lists of included studies and review papers. The search will be conducted on 19 June 2025, followed by a later repeat search for new articles once the data from the initial search have been extracted. The search will be limited to English articles. Search results will be imported into Covidence for screening. Data extraction will be conducted by two extractors independently, and the data will be summarised in tables. ETHICS AND DISSEMINATION: There are no ethical or safety concerns associated with this study. Ethics approval was not obtained as this scoping review will summarise data from previously published sources, and the findings will be published in a peer-reviewed journal.
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Registered trials
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