European journal of anaesthesiology
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Randomized Controlled Trial Multicenter Study
Alerting thresholds for the prevention of intraoperative awareness with explicit recall: A secondary analysis of the Michigan Awareness Control Study.
Intraoperative awareness with explicit recall is a potentially devastating complication of surgery that has been attributed to low anaesthetic concentrations in the vast majority of cases. Past studies have proposed the determination of an adequate dose for general anaesthetics that could be used to alert providers of potentially insufficient anaesthesia. However, there have been no systematic analyses of appropriate thresholds to develop population-based alerting algorithms for preventing intraoperative awareness. ⋯ We could not derive a single population-based alerting threshold for the prevention of intraoperative awareness using either anaesthetic concentration or bispectral index values. These data indicate a need to move towards individualised alerting strategies in the prevention of intraoperative awareness.
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Randomized Controlled Trial
Are postoperative behavioural changes after adenotonsillectomy in children influenced by the type of anaesthesia?: A prospective, randomised clinical study.
Negative postoperative behavioural changes (NPOBCs) are very frequent in children after surgery and general anaesthesia. If they persist, emotional and cognitive development may be affected significantly. ⋯ The prevalence of NPOBC after elective adenotonsillectomy in 6 to 12-year-old children was very high (80%). The choice of anaesthetic technique for adenotonsillectomy in children influenced the incidence and type of NPOBC. Sevoflurane/nitrous oxide anaesthesia was associated with more frequent and prolonged NPOBCs than TIVA, especially in the separation anxiety, general anxiety and withdrawal/apathy subscales.
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Randomized Controlled Trial Comparative Study
Differences between state entropy and bispectral index during analysis of identical electroencephalogram signals: A randomised comparison of two anaesthetic techniques.
It is claimed that bispectral index (BIS) and state entropy reflect an identical clinical spectrum, the hypnotic component of anaesthesia. So far, it is not known to what extent different devices display similar index values while processing identical electroencephalogram (EEG) signals. ⋯ High-frequency signals and eye blinks may account for index values that falsely indicate consciousness. Compared with BIS, state entropy showed more false classifications of the clinical state at transition between consciousness and unconsciousness.