Eeg bispectrum predicts movement during thiopental/isoflurane anesthesia

摘要: Objective. The objective of our study was to test the efficacy bispectral index (BIS) compared with spectral edge frequency (SEF), relative delta power, median frequency, and a combined univariate power derivative in predicting movement incision during isoflurane/oxygen anesthesia.Methods. A total 42 consenting patients were assigned 3 groups, isoflurane 0.75, 1.0, 1.25 minimal alveolar concentration (MAC). Anesthesia induced thiopental maintained appropriate end-tidal isoflurane. electroencephalogram (EEG) recorded using microcomputer system, data analyzed off-line. EEG 2 min before analyzed. Following skin incision, each patient carefully observed for 60 sec detect occurrence purposeful movement.Results. For all groups combined, there statistically significant difference BIS (p<0.0001) also (p<0.016) between movers non-movers. There nonmovers at MAC (p<0.01). no other differences any variable No showed relationship concentration.Conclusions. When analysis used develop retrospectively determined index, an association movement. Thus, it may be useful predictor whether will move response anesthesia isoflurane/oxygen.