Evaluation of Bispectral Index time delay in response to anesthesia induction: an observational study

BACKGROUND AND OBJECTIVES: According to the manufacturer, the Bispectral Index (BIS) has a processing time delay of 5–10 s. 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...

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Detalles Bibliográficos
Autores principales: Ferreira, Ana Leitão, Mendes, Joaquim Gabriel, Nunes, Catarina Sofia, Amorim, Pedro
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Elsevier 2019
Materias:
Scientific Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9391904/
https://www.ncbi.nlm.nih.gov/pubmed/31371175
http://dx.doi.org/10.1016/j.bjane.2019.04.006
Descripción
Sumario:BACKGROUND AND OBJECTIVES: According to the manufacturer, the Bispectral Index (BIS) has a processing time delay of 5–10 s. 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 3 minutes 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 ± 18.73 s. 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.

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