Ferreira, Ana Isabel LeitãoMendes, Joaquim GabrielNunes, Catarina SofiaAmorim, Pedro2020-08-242020-08-242019Ferreira AL, Mendes JG, Nunes CS, Amorim P. Avaliação do tempo de atraso do índice bispectral na resposta à indução da anestesia: estudo observacional [Evaluation of Bispectral Index time delay in response to anesthesia induction: an observational study]. Rev Bras Anestesiol. 2019;69(4):377-382. doi:10.1016/j.bjan.2019.03.0080034-7094http://hdl.handle.net/10400.16/2441Background and objectives: According to the manufacturer, the Bispectral Index (BIS) has a processing time delay of 5-10s. Studies addressing this have suggested longer delays. We evaluated the time delay in the Bispectral Index response. Methods: Based on clinical data from 45 patients, using the difference between the predicted and the real BIS, calculated during a fixed 3minutes period after the moment the Bispectral Index dropped below 80 during the induction of general anesthesia with propofol and remifentanil. Results: The difference between the predicted and the real BIS was in average 30.09±18.73s. Conclusion: Our results may be another indication that the delay in BIS processing may be much longer than stated by the manufacture, a fact with clinical implications.porMonitor do índice bispectralBispectral index monitorProfundidade da anestesiaDepth of anesthesiaConsciênciaAwarenessTempo de atrasoTime delayjournal article10.1016/j.bjan.2019.03.008