The AAI TM index, the BIS index and end‐tidal concentration during wash in and wash out of sevoflurane
2003; Wiley; Volume: 58; Issue: 6 Linguagem: Inglês
10.1046/j.1365-2044.2003.03182.x
ISSN1365-2044
AutoresR. E. Anderson, Gordon A. Barr, Hamid Assareh, Jan Jakobsson,
Tópico(s)EEG and Brain-Computer Interfaces
ResumoSummary The bispectral index (BIS), auditory evoked potential index (AAI TM ) and the end‐tidal sevoflurane concentration were studied during induction and emergence in 10 ASA I‐II patients. Both during ‘wash‐in’ and ‘wash‐out’ of sevoflurane, the AAI TM and BIS indices show huge variability and an overlap of indices between awake and not responding to command. This was the most pronounced during induction and the range of values was larger for the AAI TM index as compared with the BIS index. Mean (range) BIS was 85 (73–98) and 48 (10–83) awake and unconscious, respectively, and mean AAI TM index was 71 (43–99) and 21 (4–85), respectively. This study demonstrates the difficulties of using processed EEG variables in real time in a clinical situation of non‐steady state pharmacodynamics.
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