Bispectral Index Values During Sevoflurane-Nitrous Oxide General Anesthesia in Women Undergoing Cesarean Delivery: A Comparison Between Women With and Without Prior Labor

Abstract

BACKGROUND:An end-tidal concentration of 1% sevoflurane (1% ETSEVO) in 50% nitrous oxide (N2O) during elective cesarean delivery has been associated with bispectral index (BIS) values >60, which are associated with an increased risk of awareness. We hypothesized that BIS values during sevoflurane-N2